Lumina :: 1990 3.1 L Engine Misfire When Cold - Running Rough
I have a 1990 3.1L, multiport fuel injection (NOT sequential FI), which runs very well most of the time. However, when I cold start it runs rough (misfire) for about 1 minute (no throttle) or until acclerated. The is no misfire when running normal, but it might be running a little rough when stopped at a traffic light (in Drive, foot on brake).
I put new plugs and wires on, but it did not affect this problem.
I am not using coolant, or oil, the plugs that were removed were somewhat worn, enough that I expected to notice a difference after they were changed.
I have not yet (1) cleaned the MAF, (2) checked carefully for vacuum leaks, (3) checked for leaking injectors.
Since this is a 1990, OBDI, I can't say which cylinder is misfiring or how the fuel trims look etc.
Pontiac - Bonneville :: 1990 LE 3.8 Liter V6 Runs Rough After Engine Warms Up / Looses Power If Give More Gas
Car has 252k miles runs ruff after engine warms up, looses power, if I give more gas, car will sputter, but rev up to 5k engine smoothes out. This situation constantly comes and goes.
View 3 RepliesFord Fuel System :: 1990 Aerostar - Gas Dripping Onto Exhaust At Y-joint And Evaporating
I have a 1990 Aerostar 4WD, 4L, with about 120k miles. About 6 months ago I started my van and noticed under it that gas was dripping onto the exhaust at the Y-joint and evaporating. I shut off the van and drove another car to work. That evening with fire extinguisher at hand I drove my car up on ramps and quickly got under it looking for the leak. NOTHING. 6 months later...yesterday. I drove for a few blocks from home and notice heavy gas fumes etc. Stopped the van and again gas was dripping onto the Y-pipe joint.
This was an explosive situation... I pulled off the doghouse cover and saw, smelled and touched gas friom on the right top of the engine near the back. My questions are: What could randomly be leaking at this location and is it fixable without pulling the engine. I pushed the van to a secure location and am afraid to turn it on. Maybe I will drain the gas tank before then. I am just now trying to find the schematics for the fuel line delivery stuff. Where to go for a manual.
Mazda - Protege - Smells - Sparkplugs :: 1990 - Rough Idle Stutter While Accelerating?
1990 Mazda Protege with a 1.8L DOHC, manual 5-spd transmission, ~173K miles on it. On my way home the other day, the car ABRUPTLY started to run very rough - with what I would call repetitive and incessant stuttering when accelerating (though I am by no means technical with respect to cars). I shut the car down, hoped the problem would go away, but when I started it up later that day, the problem was still there - the car BOTH idles rough and doesn't accelerate very smoothy. When I come to a stop, the car feels as if it's going to stall but stays running. This afternoon, I took it out on the road for ~3 mile drive (up to ~ 50 mph) and the problem is the same - but I did also notice, when driving, that the car gave off a smell reminiscent of firecrackers - perhaps a sulfur-ish smell. I googled the issues I was having and I got a whole array of problems - ranging from simply bad spark plug wires (which have been replaced in the past 1.5 years) to a stuck EGR valve .
Here's some additional info on my car: -Was just in the shop 2wks ago for overheating - found the thermostat to be bad - they replaced it and I no longer have the overheating issue. While there, they also replaced the belts for the alternator and water pump (Which had been squealing for quite some time) -Spark plug wires and distributor cap were both replaced in the last 1.5 years -Last oil change was > 6 months (but less than 3000 miles) ago - all the fluid levels seem to be fine -Though I think it is unrelated, the car is also making a high pitched squeaking noise emanating from the R front of the car while driving - I suspect this is the suspension-related as the shop informed me that I have one front stablizer link broken while the other is loose (and when I push down on the R-front side of car while it is not running it yields a similar squeaking noise.
Ford Exhaust System :: 2003 V10 - Running Little Bit Rough / Exhaust Leak?
I just purchased a 2003 V10 with 270 000kms. The truck had had regular maintenance. It has an exhaust leak and runs a little bit rough. Could the exhaust leak cause the truck to run a little rough or am I dealing with another issue?
View 2 RepliesFord Aerostar :: Rough Idle And Obvious Misfire - Head Gasket Blown
Well I was afraid this was going to happen. About a two years ago, several months after I replaced the heads on the van that at the time was my brothers, the ignored a squeaking pulley. One day that pulley seized and broke the belt. My brother was not watching the gauges closely, and didn't realize anything was wrong other than the clunk noise that happened when the belt was thrown. That was until he went to turn, and the power steering was gone. He looked at the gauges at that point, and the heat was pegged out on the gauge. So he pulled it over and shut it down. I came and towed him to a shop where it could be fixed.
But I fully understand that when an engine gets overheated, especially if the heat build up was rapid, the heads warp. I also understand that the head gasket will usually seal anyway, so the failure does not often happen at the time of the overheat.
Well, it finally let go the other day. Started noticing a rough idle and an obvious misfire. Removed the cap and there is a steady stream of small bubbles when the engine is running. There is also more corrosion than should be in the cooling system for how recently the coolant was replaced.
It is not overheating right now, but isn't this a lovely time for a major problem to occur. Anyway, I took it in, and hopefully they will have it finished before I need it again. My van performs truck roles, including towing and all of my fathers trucks are either too small or on deaths door. I'm sure it would drive most of you nuts anyway, but do not ignore squeaking pulleys.
Ford Aerostar :: 1991 - Running Rough / Very Low Vacuum
1991 aerostar 4.0 ... My van was running well til last week.it allegedly has 77000 miles on it. It started running really rough within a 50 mile period. I've quit driving it til I am sure. I am not harming it. I put a vacuum gauge on it. It wildly fluctuates between 3 and 7 pounds at idle. I've tried plugging the four vacuum lines one at a time to eliminate the accessories as the problem.the check engine light is off and my scan tool shows no codes.i unhooked the exhaust at the manifolds to make sure the cats aren't clogged.it doesn't have egr. There's no water in the oil or bubbles in the radiator.i have a compression tester but id like to avoid trying to get to the plugs unless necessary.
View 5 RepliesFord Ranger / B-Series :: 1990 - Rough Start - Running Lean?
]I recently bought a 1990 ford ranger with a 2.9 @187,000 miles. That being said I went through and changed a few vacuum lines, the oil, air filter, pcv/grommet, and fuel filter.
The problem is it hates to start. I could crank on it for 10 seconds and not a single thing. Sometimes if i turn the key to the off position, wait a second, and try again, Ill get the truck to fire. When it does fire up it just reeks of the lean exhaust. It also gives me some hesitation when I rev it. I did a fuel pressure test (KOEO) last night and it gave me 32 psi and within a minute the needle fell to about 25 psi. I hear the fuel pump run for only 2-3 seconds too.
I've already pulled the MAF off and cleaned it, replaced the TPS, and did a fuel pressure test. The fuel filter is brand new
Sierra :: 1990 GMC 4.3L - When Warms Up It Starts Running Rough Then Stalls And Won't Start
My fathers 1990 GMC Sierra 1500 Pickup Truck 4.3L runs fine when it is cold but as soon as it warms up it starts running rough then stalls and won't start. There is no spark when it dies. As soon as it cools off it starts back up and runs fine till it warms back up.
View 2 RepliesFord Excursion :: 2000 V10 Running Rough - Tug Or Misfire At Low RPM
I have a 2000 excursion 4x4 v10 with 90k. The past few months I've noticed a tug or miss fire at low RPM (2000 AN UNDER) the past week its gotten worse, some occasional rough idol and the missing is getting worse. Whats wrong?? I don't want to take it to ford yet! No Check Engine Light yet...
View 14 RepliesFord F-150 - 1997-2003 :: Misfire / Rough Idle With Sulfur Smell - White Exhaust?
My 2003 F150, 5.4L has been having some rough idle/misfires issues both at idle and under load.
I have fixed one big vacuum leak, replaced the PCV valve, new sparkplugs, seafoam and heet in the gas, replaced fuel filter, tested the fuel injector resistance. Coolant levels have not changed. The truck burns about a quart of oil every 1000 miles or so. The white exhaust is heavier than condensation, but it comes and goes. The rough idling comes and goes as well, and it usually happens under load and the CEL flashes.
The codes I get are random cylinders, po303, po308, po171, po174 were the most recent but there have been other cylinders as well. I clear the codes after each attempt to fix it and they come back different.
I notice that there is a small exhaust leak that drips water just behind the engine, and when I shut down the truck a lot of water will pour out of an area just behind the cab on the passenger side as well as out of the bottom of the muffler (small hole, looks drilled).
Usually the rough idle occurs after filling up the tank, but from different stations so I do not think it would be watery gas. I use Heet every fill up as well. Also, there is a sulfur smell after the rough idling occurs (catalytic converter?).
Chevrolet - 1500 :: 1990 - Running Rough / Hesitating / Lurching And Not Accelerating Smoothly
My 1990 Chevy Silverado with 5.0 liter, 45k miles has started a problem that the guys in my diesel repair shop don't know what to do. Last week it started to run rough, hesitating and lurching and not accelerating smoothly. It idles fine, or pretty well, but just doesn't run smoothly with any kind of acceleration. I drive it back and forth to work just 1.5 miles during the week. I took it on vacation a week before, so it's not from lack of long trips, it ran fine.
A guy at my diesel repair shop put it on his Genesis scope and all it would code is the O2 sensor showed lean, but we could see it switching from rich to lean and so on. I thought vacuum leak, but couldn't find one. PCV valve is good. EGR valve is ok. I changed the fuel filter yesterday and thought it ran a little better, but now has gone back to the rough running. What I can do myself to diagnose this? I do have all the tools and shop.
Ford - Mountaineer :: 1998 - Running Rough / Engine Shaking Like A Misfire
98 5.0 last week i was driving around for a few hours and everything was fine. Did some work in the garage for a few hours and had to run to the hardware store. Started the truck up and she ran like crap. Engine shaking like a misfire. First thought plugs and wires. Well by then it was late and Easter was the next day didn't get to it till Monday. Well after the change still crappy running.
So I changed the fuel filter and cleaned the mass air. No change. Checked for spark on the coil packs all have spark. Checked the PCV all good there. Checked for vac leaks none found. During that I noticed a small hole in the EGR tube I repaired that but still running like crap backfiring out the exhaust, engine shaking badly at times. I also changed out the FPR on the fuel rail. No change of course.
As of today I changed the coil packs. Again no change. Only code it throws is a EGR high flow after I fixed the hole but was having problems before that.
Ford Ranger / B-Series :: 2003 - Misfire And Rough Running / Flashing CEL
2003 Ranger FX4 Flareside
4.0
Automatic
145,000 Miles
Here's my issue: My Ranger has been running like a dream until yesterday.
I took off on a parts run for my sons Ranger. I got to a stop sign and as I stopped, it started missing and barely running. I nursed it back home and checked the flashing CEL. It was giving me a misfire on #3.
Since I had been planning on changing the plugs and wires, I dove in and got it done hoping that was the cause of the misfire.
Started it up, same thing. I went to the next obvious item: coil. Replace it, still running like crap. Gave up for the night.
Today, I thought I would dig in using the tips here on the forum. Did the spray down...no errant spark anywhere. Tested fuel pressure: 65psi no drop in pressure on acceleration.
Started pulling wires off the coil one by one. Four of the wires resulted in running worse. 2 had no effect. #3 and #6. The coil was producing plenty of spark on all 6 ports.
At this point I was sure it had to be 2 bad injectors. Since I couldn't get injectors tonight, I moved them around after cleaning them a bit and tried my wire test again. The problem stayed on the back 2 cylinders!?!
I tested for voltage on the back injector plugs and I am getting voltage. I also used a stethoscope to listen to all of the injectors. The back 2 seem to remain silent. I have also unhooked the battery for 20 minutes to reset the PCM. Still missing and running rough....
Here's a list of what I have done:
Autolite Double Platinum APP5144 plugs. .062 gap
Autolite Pro Series wires #97051
BDW E97P Coil
New air filter
What should I do next? I really don't know where to go next.......
Ford F-150 (2004-2008) :: Misfire / Running Rough And Knocks Like A Diesel
I just bought a 2007 F150 XLT with a Triton 5.4 with 80,000 miles on it. My problem is this, the engine seems to run ok ( a bit rough) until it gets up to running temp and I have driven about 10- 20 miles then most of the time, it starts to act up.
When I am driving it is fine, but when I slow down and come to an idle about 500rpms, it sometimes runs very rough, sounds like a diesel and shakes violently. It feels like it is doing damage. Sometimes it stalls. If I rev it back up immediately it will smooth out.
In speaking to some friends they've suggested things from plugged oil channels, (affecting the cam phasers? All the way to it needing new chains, phasers and guides. I don't want to spend a ton of money doing an improper service repair only to have the issue show up later . But there seems to be a lot of different answers to the same problem. Is the dealer going to be able to diagnose something like this fairly well? Or should I try to narrow it down a bit first?
Ford Ranger / B-Series :: 1987 - Running Extremely Rough / Exhaust Smell
I have a 87 ford ranger pickup, it is running extremely ruff. You can smell the exhaust and it smells super rich and is even spitting fuel out of he exhaust. when I bought the truck the wires were cut on he oxygen sensor, so I put a new oxygen sensor in it hoping that it would lean out the fuel. The truck has duel tanks on it, but the back one is off and it is draining fuel out of the line when it is running. I don't know if the catalytic converters are plugged too, the truck only has 65,000 miles in it. or maybe its a vacuum line leak?
View 4 RepliesFord - Taurus :: 2005 Started Running Rough - CEL Came On / Cylinder 5 Misfire Detected
My wife's car suddenly started running rough. 2005 Taurus, 6 cyl, 3L, OHV, 83K miles. CEL came on and code came back as "P305 - cylinder 5 misfire detected". As a side comment, her tachometer has been fluctuating big of late as well.
View 2 RepliesFord - Explorer :: 2003 - Misfire On Cylinder 8 / Running Rough At Idle And Under Load
126000kms on 03 explorer 4.6 truck started. Running rough at idle and under load.... Code came up for cyl 8 injector. Replaced injector... problem still there. Switched cop and plug with another cyl and plug.... same code and cycl 8 is definitely not working. Would a generic problem always affect i cylinder. I even checked wire clip on for injector... it appears ok. There is power to injector wire clip.
View 5 RepliesFord Exhaust System :: 1987 Ranger - Engine Is Running Very Rough And Seems To Miss At Low RPMs
How many O2 sensors does a 2.3 fi 4 cyl. have. I think just one on the manifold, but I'm not completely sure. Engine is running very rough and seems to miss at low RPMs, has no power and drinks gas like crazy!!! Emissions light is on on the dash. I'm thinking O2 sensor......tried replacing, but couldn't get enough torque on the sensor socket wrench to loosen, may be rusted.
View 6 Replies