Santa FE SM (2001-06) :: Erratic Idle - Revs Up And Down From 1200 To 2600 RPM
Daughter's 2001 Santa Fe Delta V-6 2.5 engine, needed lower ball joints. Replaced the entire lower arms as more cost effective & actually a bit less work, for me anyway.
So While under it, see oil dripping down back of engine. Decided to replace valve cover gaskets. So I start to disconnect all the involved connectors, brackets etc to pull the Upper air intake to get to the rear cover.
While moving around, find most of the hoses & vac lines baked brittle and dried out and loose even tho clamped, so I replace all of those, plus the PCV valve., & the upper & lower radiator hoses as well. I only removed the upper 1/2 of the intake. I change out the cover gaskets, reassemble every thing, reconnect all the connectors. I noticed that some of the connectors could apparently be switched to other sensors, but since all the lines seemed so backed solid, they actually retained their positions to go back onto the proper sensors.(at least I hoped so & it seemed that way).
Anyway, every thing back together & tightened up, so I start it up & the idle is at about 3000 to 3400 RPMs. WTF? So I pop the throttle a couple of times by hand and finally it drops down to normal, then just as suddenly, it begins SEARCHING for lack of a better word, and starts racing upto 2600 rpm then drops to 1200 then up again then down again.
No check engine light or other idiot lights on. So I shut it down & check all the connections and hoses, nothing disconnected or left off or loose. I start it again, and it immediately begins running high & low searching for the idle again.
I shut it down again, and put the MacPro scanner on it and NO codes either set or pending. I next check the Haynes Manual I have for it, & the closest thing I can find to my problem says: Engine Lopes while idling or idles erratically 1) Vac leak 2) Leaking EGR 3)Air filt clogged 4) Fuel pump not delivering enough fuel 5) Leaking head gasket 6) Timing belt/sprockets worn 7) Camshaft lobes worn
By process of elimination, not #'s 2) According to service manual, there is no EGR valve on the 2.7, and I couldn't find one either, #3) Air Filter is new & clean, #4) ran fine before I worked on it & with the engine revving up to 34 or 3600 rpms, getting plenty of fuel, #5) Have had many head gasket problems over the years on many vehicles, never anything like this, and again, it ran fine until I worked on it #6 & 7) Doesn't seem to me to be a belt sprocket or cam shaft problem, as none of that was touched & again, it ran fine until I worked on it. This kind of narrows it down to #1, for me, but this is not like any vacuum leak I have ever come across in 45 years of auto repair. I have found & fixed many stumbling idles due to minor leaks but never had anything like this.
I next called a friend who owned an automotive machine shop & who I used to do work for, and now runs a highway dept garage for a municipality who has been a certified mechanic for many years, told him all the above & the only thing he could come up with was a MAJOR vacuum leak, like possibly the upper plenum gasket rolled up or got torn some how when I replaced the plenum and he suggested that I try a smoke test.
Scratching my head, I go back to the car, & break out my home made smoke machine that I use to successfully pinpoint leaks in emissions systems. I ran it for quite awhile, and found some light smoke leaking from somewhere down around the head, but due to the construction of the engine & no way to get the light to shine under the plenum, could only guess that he may have been right & that there may be a large leak down at the lower intake manifold to head gasket. Needless to say, I removed the upper plenum again, & this time also the manifold to heads, and the gaskets looked like they may possibly have leaked slightly between the ports, & quite possibly somewhere around the number 6 cylinder. So I cleaned the surfaces & am putting on the new gaskets that came in the set with the upper plenum to manifold gasket set.
My questions after relating all of this:
1) The 2 gaskets between the manifold & the cylinder heads have a blue stripe around all 3 cylinder port holes (appears to be some kind of sealant or factory applied silicone bead) & there are no markings of any kind anywhere on the gaskets, so do the blue stripes face DOWN to the heads or UP to the bottom of the intake manifold ?
2) Regardless of which way these stripes face, should I use any kind of high temp sealant around the port holes in addition to the gaskets, or just install them dry ?
3) Can the Idle Air Control on the Throttle Body Fail & affect the idle like the problem I am having, but NOT set a computer code ?
4) Can the Throttle Position Sensor affect the idle like this and NOT set a computer code?
5) I also found an electronic valve between the Air Intake & firewall, it is labeled PCV and has an OEM part number after that, I believe this to be the Purge Control Valve, which connects the TB to a plastic line which I believe runs down to the emissions canister under the vehicles front seats. Am I correct in thinking that even if this part had failed, it would have NOTHING to do with my erratic Idle problem, but would throw an emissions computer code?
Accent LC (2000-05) :: 2002 - When Restart Car Won't Get Past About 1200 Revs
My 2002 1.5td accent starts from cold every time but if drive about half a mile then stop when i restart it wont get past about 1200 revs. i leave it for 5 mins then runs fine...
View 1 RepliesGolf IV R32 :: RPMs Rise To About 1300 Then Drops To About 300 And Back Up To 1200 Steady On Cold Start
It started snowing going down to 10-15 degrees during school hours. and whenever i go to turn my car on it starts but immediately the RPMs rise to about 1300 and then immediately drops to about 300 then immediately back up to 1200 but stays steady until it warms up then drops to normal about 700. i understand the cold start when it idles high until it warms up but why does it drop then come back up?
View 3 RepliesFord - Taurus :: Clutch Stay Engaged When AC Is Switched On Even In Cooler Weather?
I bought a 2005 Ford Taurus last month with a bad A/C clutch. I had a friend, who says he knows about such things, replace just the clutch. He says he lost no refrigerant, which should be right. The A/C blows cold OK regardless of the ambient temperature, but the new clutch clicks in and out. I was of the opinion that this was caused by a low charge.
My (not always right) friend thinks it's normal, due to the cooler weather. I THINK the compressor should run all the time, and the car's interior temp is regulated by the flapper doors. I have no way to capture the present charge and weigh in the exact amount needed. I have accurately weighed in an additional 8 ozs, with a good digital scale, and it still clicks in and out. I have readings of 125/25, but the outside temp is only 50F this morning.
What readings should I see at 50F? Do I still need more R134a?
Golf IV / Jetta IV :: 2005 - Oil Cooler Randomly Start Leaking?
I've got 149,xxx miles on my Golf TDI. Took it by a local shop for a routine oil change and since then, it's just been puking oil from the oil cooler. I took it back to the shop and the mechanic even pointed that out. Some red flags here; Timing is too shady. This happened literally the day after the oil change. He also told me that he won't use customer-supplied parts for liability reasons. Seems believable enough, but why would this part just choose to go wrong now?
This is my first time at this shop too and I've never really dealt with "bad mechanics" before but something about this isn't sitting right with me, and I'm not sure how to handle my next step properly. So what would cause an engine oil cooler to leak profusely just after an oil change?
Ford - Crownvictoria :: Shifting Becomes Rough / Car Revs And Jerks In Warm Weather
I have a 94 Ford Crown Victoria with 180,000 miles. I got it from my grandmother in 2008. It's a great car a runs like a dream most of the time. Here's the problem though...for the past three summers, when the temperature outside gets above about 70 degrees, it starts giving me transmission problems. The shifting becomes rough, and it revs and jerks. It does this all summer and then when the weather cools off again it runs beautifully. Do I need a new transmission or is there something less expensive that I can do to fix this? Why does the transmission act up only in warm weather?
View 5 RepliesGolf IV R32 :: After Jump Start Car Now Revs At Idle - ESP And MIL On
My mechanic and friend noticed my axle was starting to fail about a few weeks ago and Ive just been waiting to get it taken care of when I have time. Last night my battery died and I got a jump start. After the jump I get in and drive down the street a little ways and notice the ESP light came on. She was also running a little rough at idle and I started getting nervous. So instead of getting my Micky Dees I turned around and went home. Of coarse this happens at 3am the night before I have to open up at work at 11.. This mourning I get in the car and warm her up to see how shes acting. I decided to still drive her because I had no other option. The MIL light popped on now too and I think its related to my axle failing. So im wondering I guess how much longer I have til this thing completely goes and what would happen if it went while I was driving? Ive never had to replace an axle before or and an issue with one so this is a subject I know very little about. Also is it worth it to get RAXLES for stock?
So after my battery died like I said I got a jump start from my buddy and after I jumped it the car seems to rev at idle now. Freaked me out! Would all the sudden start revving to 2k rpm and then stop. When I drove it to work almost every time I stopped it would rev a little bit but when I gas it it would stop. After doing research there are a few conclusions I have reached. First I read it could be a throttle body sticking? Then I read the jump start could have fried my ecu or it could be a simple as a loose wire to the motor from a bypass valve?
Im not sure if the jump start did anything bad. Its possible its a coincidence still but my car was fine before the jump. Also on a side note my ecu was already flashed when I purchased the car. The flash is from EIP I believe because there is a eip sticker on the battery case. Personally I think the MIL light is related to the axle but the weird idling is what scares me.
Golf V R32 :: Start Then Going To Stall - Revs Don't Climb Very High At All
I posted awhile back about my R not wanting to start. It will start, just not turn over right away, but it will start the first time. However, it feels like it's going to stall out because the revs don't climb very high at all (1k at best) when it usually goes just over 1k to start, then drops down to 5-600rpms.
Yesterday, after it sat in the hot sun for nearly 3 hours, it cranked but didn't start right away. It had started right up when I left my house to go to the gym, and I drove it 5 miles to the gym.
Then again, this morning, after it had been sitting outside all night, I went to start it and it just didn't sound right when it started, like maybe fuel wasn't getting to the engine.
The car has 31,500 miles on it, has had all recalls done, and the battery checked out last month. The battery was fine, so it's not the problem. I have been doing some research on this issue, and have come up with the following things to have the dealer check:
-fuel pump
-fuel pump relay
-coil packs
-crank position sensor
-fuel pump fuse
-fuel filter
-injectors
-alternator
-starter motor
-crank angle sensor
-cam sensor
-check all grounds
-check fuses
And to top it off, I just drove it down the road and the sunroof randomly opened on its own. I have never had that happen before! Do you think the two are related at all? I'm just wanting to make sure what to tell the dealer when I drop it off later this afternoon. I ran a vag-com scan last night and there were no electrical or engine fault codes found, so I don't know what is up with it.
Golf IV / Jetta IV :: Revs High Between Shifts And Randomly Doesn't Start
I bought this car and I've changed out the Clutch Position Sensor, the black one on the clutch mount. Started to work and start but now it's doing the same symptoms as before. So here is what is going on.
1. Randomly doesn't start, full power comes on, and fuel system turns on, immobilizer works just fine as far as I can tell (key light turns off)
2. Cruise control doesn't work (which lead me to the CPS)
3. High revs between shift, once I push the clutch to shift it revs up high, I noticed that if I stay under 3k it doesn't do it as much, but if I go HAM on it it revs up about 1k rpm more than at shift point. But if I shift nice it revs about 2-400 rpm.
It's been tuned by C2 Motorsports, done by a certified mechanic, that's the only mod on the car, besides suspension. I bought the car and dropped 1100 to fix it to drive right, newish throttle body, and a major vacuum hose, and the tune within a month of getting the car and the tune was to mainly flash the ecu so it wouldn't pull two codes for a leak that wasn't there anymore.
Golf IV / Jetta IV :: 1998 - Won't Start In Humid Weather
My daughter bought BIL's jetta and loves it. Already had to replace the seal on the oil cooler which wasn't too bad to do. But now she's out of town with the car and it won't start. Said it did start and run for a bit, long enough to get half way down the driveway and then die. Won't start again for her. Called BIL and he said it had done that to his daughter also during high humidity times. Well we have been foggy all day, guess that counts for high humidity .Could this malady be from condensation under the cap or is it something more sinister?
View 4 RepliesGolf IV R32 :: Vibration On And Off During Commute From 600 - 1200 RPM
Driving home from work yesterday I noticed my car started having the vibration on and off during my commute. Traffic most of the time so I could feel it just reving the car up a bit. It happens going up from 600-1200 and back down I can feel it too.
View 2 RepliesLexus RX 2010-15 :: 2012 Idles After Start Up On A Warm Day At 1200 RPM
My 2012 idles after start up on a warm day at 1200rpm which seems high to me. Should it be lower?
View 1 RepliesGolf IV / Jetta IV :: EPC Light Came On, Idle Went Up To 1200 Rpm's
After about a 45 minute drive yesterday the EPC light came on, idle went up to 1200 rpm's and when I turned off the car it wouldn't turn on, just leaving the ignition for about 5-7 seconds is when the car finally started.
Today, again after a 45 minute drive the EPC light came on again, same symptoms, except that the car stalled and I had to turn the ignition again about 5-7 seconds for it to start. No other light is on, and the car would start fine after about half an hour rest with no EPC light.
Lexus RC F 2015+ :: High-Pitched Whine Below 1200 Rpm After Cold Start?
I posted a related video in the fuel pump thread here where the high whine noise is apparent several seconds after a cold start. Now from inside the cabin, looking at the revs, the "sewing-machine-like" whine disappears above 1200 rpm.
High-pitch noise below 1200 rpm - YouTube
Sonata NF (2006-10) :: High Idle Speed About 1200 RPM On Cold Start
Bought my 2006, V6, about 2 months ago. This morning was the first really cold once since I bought the care. When I started it today, the idle speed was about 1200 RPM. It took a few minutes to warm up and then the idle speed dropped to normal. Quick question. Is this normal?
View 1 RepliesGolf IV / Jetta IV :: EPC Light Has Come On - Car Will Idle At 1200 RPMs Up From 800
Recently I believe i got a tank of bad gas. Was having problems starting. Finished it off filled up used injector cleaner and dry gas to clean it out a bit more. Now as I was driving the car would basically stall out but kick back in as I was driving and the EPC light would come on. I've been reading up and most answers are a bad coil pack. I pulled them all out and checked them they all look pretty good. No codes are popping up for it a coil pack. Unless I need a specific VW model computer to check. I'm gonna check the volts on the coil packs today to see as well.
The EPC light does go off after the car sits a while. It comes back after a few miles driving. After the EPC light comes on my car will idle at 1200 RPMs up from 800 when its normal.
Golf IV / Jetta IV :: Vibration At 1200 Rpm When Idling And Rev The Engine
When I'm idling and I rev the engine to exactly 1200 rpm i can feel an extra vibration coming from the engine. If i hold it at this rpm it will continue on. now this is not a violent vibration but more so of a buzz i can feel that travels to my steering wheel as well. what could it be ?
Another question is when i travel up my driveway and i hit the sloped curb at a angle i can hear a specific "clunk" sound coming from around the drivers foot well area what could this be? perhaps my axle going bad? I also heard it when I was reversing out of my parking space while turning.
I am new to this car and trying to make sure I'm doing everything i can to put it into good shape.
Golf IV / Jetta IV :: 2006 - Misfire Between 1200 - 1800 Rpm
Vehicle: 2006 Mk IV Golf 2.0 GLS With 82766 mi
Back story: I purchased the vehicle from my dad who did regular maintenance except that somehow spark plugs and wires slipped through the cracks until now. A few months ago (while I was in training) it apparently started showing CEL but the few times it came on, my wife said it just disappeared. Two weeks ago, it came on again and I had the code read which came back as P0420. I took it in and they replaced the rear cat after which it ran well for a few days. Then the CEL came on again but went off before I could get out in the shop. This weekend I went ahead and changed the oil and may have over filled it slightly. The next day I went to change the spark plugs and after changing 4, 1, 3 it started to miss fire in 4 and 1. I reset both spark plugs and got 4 firing again, but 1 remained bad. With a friend I determined there was a weak spark in 1 and changed the wire but no change.
Current situation: As it stands now, it's still miss firing. The worst seems to be between 1200- 1800 rpm and if I keep it above there the light will stop flashing and even turn off on some cases. I've read that heart mixed with moisture(I just moved from AZ to WA) can lead to a cracked coil pack or that the injectors can go bad. Should I just take it to vw specialist?
Golf IV / Jetta IV :: Idle At 1200 RPM Way Down To 800 When Starting And Engine Is Cold
I have a 1.8t jetta that has a weird idle issue when starting and engine is cold it like to idle at 1200 rpm then will eventually work its way down to 800 rpm
I have no cel codes and have looked for vacuum leaks (but may have missed one) ,but if i start the car and it idles at 1200 rpm then i shut it down and start it right after it will idle at 800 rpm as normal.
Its a 1.8t unitronic stage 1 stock everything except e type coils with plugs at .032, Also does not have much pull after 4000 rpm, not to worried but just may be part of the issue....