Chevrolet - Silverado :: Random Sputter And Backfire
2000 Silverado 5.3So I recently replaced my head gaskets. And I think I'm finally done working on this truck when I took it for a long drive and it did a little sputter and then backfired. I thought it was nothing since after the backfire it went right back to running perfect. Then again another day it did it again. Sputter. A loss of power and the BANG backfire and it was back to running like new. At first it was very rare. Maybe once every other day. Now its doing it 2-3 times on a normal drive to work. And it will idle rough during one of these spells as well now. When it starts to sputter and lose power I can throw it in neutral and rev it a few times. Once it backfires it's back to running like new. Only codes I'm getting are o2 sensors but I have no cats. Just straight pipes from headers to a turn down exhaust. I was thinking maybe a fuel regulator but I had replaced that just a few months ago. Could it have already gone bad? I changed my fuel filter not long ago and cleaned injectors and rails when replaced head gasket.
View 4 RepliesCamry :: 2003 - Transmission Doesn't Shift Out Of Second Gear When Start Driving In Cold Morning
My camry has been great up until the last week. The weather has gotten extremely cold here and when I start driving in the morning or from any cold starts the transmission doesn't shift out of second gear. After I drive it a mile or so and slow almost to a stop it will shift normally until I park it.
It has 125000 miles on it and I hope this isn't a serious problem because it is a great car and has been well taken care of. Looks brand new on the inside and out and I've never had any problems until now.
Lexus IS 2014+ :: Random Exhaust Backfire / Pop After Braking And Coming To A Complete Stop
I have a 2016 is350. I just took off my is250 exhaust and installed it onto the 350. It is an invidia axle back paired with a tsudo midpipe. Since I have made the switch I have noticed several times after braking and coming to a complete stop within a couple seconds the exhaust "pops" usually 1 time and it is fairly loud. This did not happen on the 250. What is concerning to me is that it doesn't sound like normal exhaust popping/gurgling when slowing down or downshifting it is more of a sudden loud single pop after coming to a stop.
View 6 RepliesEscort :: 1990 - Random No Start Condition When Cold Outside
A friend of a friend has a 1990 Escort 1.9L automatic with a TBI setup. It has a random no-start condition that only seems to act up when its cold outside (below 20 F). I've only seen it act up once with minimal testing equipment, so I'm digging for answers.
The injector fires normally and flooring the pedal goes into clear-flood mode as it should. It has spark, but sounds out of time. It will attempt to fire unless the pedal is floored long enough to take fuel away. Starting fluid in addition to the fuel makes minimal difference, but results in intake backfires when you stop cranking. After a random amount of cranking, it will eventually fire and then the issue goes away completely.
Once it fired, I was able to shut it down and restart it indefinitely with no hesitation. While running, it shown no signs of being out of time, vacuum leaks, etc. I have very little experience with the EEC system, but friends suggest a TFI module. A weak or mistimed spark seems to be the cause, but I'd like a second opinion. I shook and moved every wire I could find and checked the TFI pins for corrosion - no change.
Random Start Was Little Sluggish - Won't Idle In Gear
190,000 miles and idle has never been a problem. I noticed a few weeks ago that one random start was a little sluggish. Went to start it yesterday and it was dead, no cranking. A minute later it fired right up but now it won't idle if it's in gear. Runs in neutral or park but I have to keep taking it out of gear at stops or it starts stumbling, the idle drops and it dies. The check engine light never came on. The most recent work is a new AC compressor, two new O2 sensors in front of the cat, and a new power steering high pressure hose. At the dash gauges - oil pressure, engine temp, and voltage look good and it runs smooth at speed.
View 1 RepliesGolf IV R32 :: Random Long Crank Usually Happens When It Is Really Cold
I was going to post this in the technical forum, but going by the amount of replies, this forum seems to have much more traffic. Anyway, my car has random long crank issues. It usually happens when it is really cold or if the car has sat for a day or more. I will have to hold the key over for 5+ seconds, but as soon as I turn the key back and crank again, it fires right up.
I have replaced the battery and tested it and the alternator, replaced the CTS (green top), not that it's relevant, but I just replaced the thermostat, housing and all seals, no CEL. Any other things I can check?
Lexus GX 2004-09 :: Random Cold Start Knock In Reverse
First: 2007 GX470 with 63k miles
On some 'cold' starts (and I use that term very loosely, because it never really drops below 40 degrees here), when the engine has sat overnight, and when I shift into reverse (never Drive, just Reverse) and stand on the brake I get a knock. I don't hear it in Park. Not valve clatter like on my german cars while the oil gets routed to the lifters, but instead a loud, startling deep-down knock that sounds like BAMBAMBAMBAMBAM. Then it goes away. Put it in neutral and the revs rise and it's gone. Put it in Drive and nothing there. Just lasts for maybe 5-10 seconds, but is it loud. BAMBAMBAMBAM! Like someone hitting a 2x4 on the block or tranny housing.
Once I'm past that 5-10 seconds it won't do it again all day. Just after a "cold soak". And perhaps 5-10% of the time.
There is a lot of examples with this motor of what some call "piston slap". Don't know if I have it - and I suppose it might get worse (to the point where I hear it) when the engine is cold and under load (in gear), but I don't get it in Drive. Just Reverse.
Tiguan :: Running Rough During A Cold Start / Random Cylinder Misfires
I've got a 2009 Tiguan with 65k miles on it. A few weeks ago I noticed some issues with running rough during a cold start. I only noticed because the engine would vibrate considerably more than usually for the first few minutes of operation, and would idle at around 1050-1100rpm instead of the usual 750rpm. After warm up, things were fine. Suddenly the issue got bad real fast - wife was out and the MIL light came on, EPC light came on, and the car was running extremely rough. We managed to drive it home (2 miles) doing under 20 the whole time on side streets. Once I hooked it up to my OBD reader, I was seeing cylinder misfire codes on all four cylinders.. P0300, P0301..P0304, all five codes simultaneously.
Since the car was due for an oil change and hit 65k miles recently, I decided to throw new plugs in there to see if that would work. It did, at first.. A day or two it ran completely fine, no rough starts, no misfires, I thought I had solved the problem. The old plugs had some deposits on them and were original, so I thought I was in the clear. Two days later, same thing happened again.. EPC light, barely running and misfires on all four cylinders..
I read up some online and decided to order new ignition coils. Took a few days, but I got four new coils and threw them in. Again, problem solved it seemed. No more EPC light, misfire codes didn't come back and no more rough starts. I drove a good 40 miles with no problems at various speeds, but started noticing some misfires during acceleration (slightly rough acceleration, almost feels like a back and forth rocking motion, very slight). Sure enough, after a cold start I'm seeing the engine run a bit rough again with misfires. This time, only P0304 (misfire on cylinder 4) is thrown, and it only shows up as a "pending code" (engine light flashes for a few moments during start, but does not stay on).
I checked my connections, swapped the plugs and coils in what I thought were cylinders 3 and 4 (closer to the driver side), nothing. I swapped what I think are cylinder 1 and 2 (passenger side) just to be sure, but still nothing. At this point I'm pretty lost. I know enough to be dangerous with a carbureted engine, but am lacking in knowledge when it comes to a fuel injected turbo charged VW engine. It seems to be cylinder 4 misfiring consistently at this point according to the OBD reader.
Also of note.. I had some misfire problems last year, and had my intake manifold replaced as part of a recall (also had carbon deposits removed at the same time). Can a carbon build up occur this fast? Can it be the injectors?
Ford F-150 - 1997-2003 :: Random Delayed Start When Truck Is Cold
Not all the time, but I've noticed it after the truck has been driven - shut off - then started again within a few min period. When truck is cold or has been sitting for an extended it starts no problem. By "delayed" I mean once I try to start the truck it takes a sec or two longer than normal before it cranks. Then when it does start it will idle very low for a sec or two then pick up and act normal.
So far I've done this to remedy it:
- new fuel filter
- new air filter
- cleaned MAF sensor
- cleaned throttle body
- seafoam thru vac hose
Only thing else I suspect is weak fuel pump but looks like it was act up all the time not just when the truck is started back to back. Truck has good power when running, I did a couple short blasts up to 80mph and everything was fine.
Golf IV R32 :: Random Throttle Hesitation In First Gear
I finally decided to take my car in to the dealership for this random split second hesitation that mostly happens in first gear. I have 8600 miles on the car and it has done it since the day I bought it. I thought it might have been compressor related from running the AC. I have tried driving with no AC and ESP off and it still does it.
So I take it in and they decided to let the new guy work on my car. I take him on a ride (AC and ESP off) and sure enough it does it nice and strong for him to feel it. I was happy so we went back to the dealership and they gave me a 2.slow rental and I was on my way. 24 hours later they call and tell me, "Ron we believe it might be your throttle body so we're waiting on the regional master tech to get his opinion before we put a $750 part on your car".
I'm like "ok, whatever you say, just call me tomorrow with an update because I don't want it back till it's fixed". They call me the next day to inform me that my brake light switch was faulty ($10.25), they replaced my wiper blades, adjusted my wiper arms and the car was ready to be picked up.
Now that I have it back I can say driving it now that it's acting normal is an adjustment. My mind expect that hiccup but it doesn't happen, at least not most of the time. I'm not completely convinced that this hesitation is gone because I think I felt it happen once yesterday. Time will tell... In the mean time it is 95% cured.
Passat (B5) :: Random No Start - Shut Off While Driving
I have a audi a4 1.8t engine code atw and for awhile i would have random no starts then about two weeks ago it shut off while i was driving home from school and hasn't started since. it turns over fine but i am getting no spark and im getting the error codes p1517, p1433, and p0321 so far i have changed the crank position sensor, the cam position sensor, and the ecm main power supply relay. Still I am getting no start i cant figure this out...
View 7 RepliesTouareg :: 2006 - Backfire / Exhaust Ping When Cold?
Since new, I've noticed that my truck makes a ticking/pinging/tiny backfires when cold. I can't really hear it unless I open my window(s) as it comes out the back end and isn't anything in the front end (...its an exhaust issue). Is the truck just running rich when cold?
View 6 RepliesAustin - Healey :: 1965 - Popping / Backfire Noise When Engine Is Cold
I have a newly rebuilt engine on my 1965 Austin Healey 3000. When the engine is cold it makes a popping/backfire noise. After the engine has warmed up for 10-15 minutes, it doesn't make the noise anymore. See this video [URL] .....
View 7 Replies3000GT/Stealth :: Sluggish And Backfire When Driving
Need to locate and resolve the backfiring problem When I drive the car. I changed the lifters and smoother out the throttle body and install a new fuel filter and lines. the car ran fins until is missed shift and stalled the car. I then read on one of the forums that the coils could be bad so I changed all of them plus the O2 sensors. and the car idles fine but as i put it into gear it sluggish and backfire. I have change all that I know to except the spark plugs and wires. I'm thinking something maybe wrong with the computer. I don't have any diagnostics equipment. Is my engine ready to die?
View 2 RepliesGolf IV / Jetta IV :: Power Loss At Random Times While Driving Or Idling / Headlights Flickering
I've been experiencing power loss at random times while driving, idling, With almost always flickering headlights on my mkiv 1.8t gti. Also on what always seems like the exact same spot on the freeway I'm losing all power to the wheels and it feels as if my plugs aren't firing for about 10 seconds Which causes me to bog down. At which point I down shift and play the throttle until my motor then begins running normally again.
I've semi recently replaced my battery and terminals, due to corroded terminals and worn out battery. Is is possible a ecu reset could solve this problem?
Also when the power surges during driving my traction control and hand-brake lights on the tachometer will flash and the car will beep three or four times (same as when the hand-brake on beep).
Golf IV / Jetta IV :: 2007 - Display Seems To Be Fading - Showing Random Icons - Radio Dies While Driving
While I drove to and from the dog park yesterday - a total of 25 minutes - several alarming things happened to my 2007 Jetta (2.5L, 4 Dr, single owner = me). On the way there, a yellow icon popped up on the instrument display, and since I'd never seen it before, I looked it up in the manual after we parked and went into the park. It was the power steering icon - not low fluid, but your power steering may stop working, better get it checked. (!) Yellow is the warning, and red with noises is the serious problem level. But it also said sometimes that symbol shows up and then goes away. After 90 minutes in the park, I started the car and it wasn't there. And I didn't feel any problem with the steering. Then, after 3 minutes of very low speed driving, the radio display started to flicker, and the radio popped and then shut off by itself. Then the instrument display that shows the mileage, the tank mileage, the temperature and the time in red numbers started to fade, I noticed the A/C was blowing warm air, and three more icons showed up: the power steering one, the ABS brakes, and another one I didn't recognize. I kept driving because I was in traffic, and then after about 2 - 3 minutes, the A/C got cool, the radio came back on, and the icons went away. I haven't started the car yet today, but it drove all the way home last night with no weird episodes.I was in an accident in June that required both drivers side doors to be replaced and a lot of cosmetic work on the back bumper, but no impact to the engine area or front of the car. Any thoughts on what's causing this? I have a long freeway commute and I am worried about driving with things just cutting out like that.
View 5 RepliesGolf IV / Jetta IV :: No Start - Random Misfire / Stalling And Bad MPG
Well first the exact car I have. 99.5 Jetta 2.0 AEG. It all started with one loud backfire with a stall at a stop light while in neutral. After that it was random stalling and jerking while driving. So I checked my everything and all seemed well. I replaced spark plugs because they where fouled and nasty. Cables are good. They're near new and tested them with a multimeter. Next I checked my injectors and they are surprisingly very clean.
I had also ran seafoam prior to these problems a few weeks before it all started. Next step was new fuel filter. Old one was nasty and black stuff dripped out. That didn't work. So I checked for vacuum leaks with throttle body cleaner. Nothing. Visually threre is nothing wrong under the hood. So today I changed the fuel pump. Went for a test drive all seemed well. Can out of the bank. Then it won't start. So I wait like normally. And it normally gets me home. Nothing. Will sometimes start but if I'm not holding the gas it dies. I don't know what to do. My only other thing I can think of is the coil pack.
Golf IV / Jetta IV :: Random Hard Start After Car Is Warm / No CEL
I have a 99.5 golf gls with an 02' engine in it. 5 Speed, neuspeed supercharged with a bunch of other stuff done to it.
I've had this issue as long as I've owned the car (3-4 years). Starting the car cold, it usually fires right up and can drive it e, no problem. However, when I get the car up to operating temp and turn the car off, if I immediately try and restart the car it either :
A.) chokes but will fire or
B.) will have a long crank and usually starts hard.
Another thing I noticed is that at low RPM right after the clutch has been engaged, the car seems to almost hesitate like something is holding it back, even if I give it more gas. I have checked my codes with Vag com and the only CEL I have it for not having a post cat o2 sensor (picks up that the heater circuit is unplugged). I also have run some diagnostics on my fuel trim and both long and short term fuel trim are within spec. I tested two different mafs and both were around 2.5g/s at idle. Checked for vac leaks and didn't have any.
I have read that a dead/dying crank sensor can give me the symptoms I have, but I seem to be lacking a symptom where the CEL is on for the sensor, and my car doesn't randomly die when driving. So my question is, have any of you had the same symptoms but no CEL?
Golf IV / Jetta IV :: Random EPC And CEL - Can't Communicate With ECU - Doesn't Start When Warm
So, the very first time it happened was the weekend after I installed my new motor mounts I am not sure if it is a coincidence or if there was something that I touched while installing that is causing the car to act this way. So I notice that it's more common on the wet days even though I have started to doubt this recently as well. The instrument cluster illuminates CEL and EPC for a brief second and the car feels like it looses all power and sometimes even stalls when at idle but then after that goes away it runs like a champ. Also ever since this started happening the car is really hard to start after it sits off for few minutes when at normal running temperature. Right, when it happened I tried to scan it and I thought it was the scanner that was not able to communicate with it but that wasn't it since I have tried over 10 different kinds now( that includes the ones that have scanned my car with no problem before). I did have the CEL to stay on once but I still couldn't scan it and it went away by itself or I have reset it by disconnecting the battery. Its really driving me crazy and I am stuck but not giving up on this car, I love it too much and it's been very faithful to me so far! I mean there was literally two days recently when the weather was dry when I drove the thing without the random occurrence of EPC and CEL but it still didn't want to start when warm. In fact, one time after work after it has been sunny all day it didn't want to start when the engine was still cold as well.
The things I have replaced or tried so far that have not repaired it are:
*New Camshaft Sensor
*New Crankshaft Position Sensor
*New Purge Valve
*New Coil Pack
*Took off and cleaned my Throttle Body
*Checked with and OHM meter as many grounds as i could find between battery and they all checked good(the main engine ground looks good)
*Cleaned MAF sensor
*New Coolant Temperature Sensor
*Checked that all fuses were good and seated
*Verified that the k-line is good.
*Able to scan the ABS module and radio through vag com so i know its something with the ECU communication
That's all that I can remember as of now. the car went through many stages but here is how it looks as of now.
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