Changed the spark plugs, but the engine still idles rough while in drive and stopped. It's fine in park or neutral. P0303 popped back on today while warming up the car. Changing plugs significantly improved the idle...but it still is rough.
View 7 RepliesThe dealership did my oil change. Afterward, the engine idled rough. I drove home 50 miles and called and they said they may have overfilled the engine oil. The dipstick level is about 3 inches over the fill mark. What damage could result and how to approach the dealer about it?
View 3 RepliesLately I have been having some trouble with 2002 Oldsmobile Alero v6. When the car is sitting in park I have noticed that the engine idles roughly, And when I try to drive it, the car hesitates on the acceleration every now and then. Also the emissions light (the orange one) will come on for awhile and then dissapear. At first I though it was dirty fuel injectors so I added some Fuel injector cleaner, but that has not fixed the problem. I was thinking the park plugs may need replacing?
View 1 RepliesI have a 1999 F150 4x4 5.4, I pulled the heads due to blown head gasket. Prior to pulling heads truck started and run fine other than miss on #1 cylinder. I timed the engine according to Haynes manual and posts on this site. Truck is now hard to start and idles very rough. I does seem to smooth out when reving the engine and seems to have plenty of power. Cant find any vacuum leaks or unplugged wires.
View 1 RepliesI have searched but with no solid answer..
What I got - 04 Camry, 231K, never had issues, do all my maintenance myself, brakes, plugs, oil etc..
#3 Cyl misfire..
Possible causes
Plugs, - Has been about 2 years since I replaced
Coil - Bought car new in 04, never replaced
Cat - never gave it a second thought
fuel injector - put techron by Chevron just about every oil change, I know I missed one here and there..
burned exhaust valve - say it aint so...
poor compression - I have to rent a tool...
defective computer - I don't think so..
I have a 2000 VW Jetta 2.0l AEG engine with 190,000 miles and check engine code P0303 for the 2nd time in 3 months. I had this same code 3 months and 3000 miles ago and found the spark plug #3 to be fouled up. All other plugs and wires seemed to be okay so I replaced plug #3 and the problem went away. I suppose after I take off the upper intake manifold I am going to find the same plug #3 to be fouled up again. The engine is a typical AEG that I have to add 1 quart of oil every 1000 miles as it has been burning the same amount of oil since I acquired the car at 135,000 miles. I have read that the wrong piston rings were installed from the factory on a large number of these engines and VW says that if less than 1 quart of oil is burned after 7500 miles it is normal. I really don't feel like spending 2 hours every 3000 miles to replace plug #3 ? It might be time to part ways with my 2nd VW. As a side note, this car has been averaging 35.5 mpg over the last 55,000 miles that includes 50% city/ 50% highway driving. I coast to red lights and don't accelerate quickly with the 5 speed manual transmission to achieve hybrid like fuel efficiency.
View 1 RepliesMy wife's 2010 RX350 with 75K miles on it , the check Engine Light came up with code P0303 (cylinder misfire). Since the warranty is out already so I went to my mechanic and had the spark plugs and the back ignition coils replaced. After a week, the light came back on. So I went to the dealership and they said the engine needs to be taken apart because of low compression and valves could have carbon build up already.
View 11 RepliesWe got our latest Santa Fe computer email and it warned of an engine fault. The car itself was not flashing any warnings though. Took it to the dealer and they said OBD was throwing a P0303 cylinder 3 misfire code. They shifted the ignition coil, and replaced the injector and seal before resetting the code. They had the car for 3 days though. Car was not running rough or anything else you would expect from this type of issue. Still trying to figure out why we got the email with no indication of trouble from the car itself.
View 3 RepliesI have an 05 Accent with about 115,000 miles. It is a GLS automatic.
This morning as I was pulling from a stop light about 30 seconds from my office the car was extremely sluggish. I noticed the CEL light blinking and could hear a knocking sound from the engine. I pulled over and found code P0303, cylinder #3 misfire.
I checked the spark plug cable on the coil side it looks ok. I have not been able to check anything else yet as I am at work.
I own the 2014 Santa fe turbo 2.0 litre limited which has 4000 km on it. Within 210 km the engine light came on 3 times. I took it into the shop and they ran a code of P0303 which is a misfire, they changed the coils #2 and #3 and cleared the code. The second time it showed the same code but the shop said it was in the history so that is why the same code came up again. They ran an update ECM? and all was good. Now the 3rd time they tell me no code has come up and can't do anything about the engine (they cleared it) but it was like chasing ghosts. My vehicle runs great so not sure why I am constantly having this issue.
View 68 Replies1999 ranger 2.5. 135k!So I started with a tune up all motorcraft, fuel filter and air filter. Did nothing! So I did compression check all cyc 150psi and above. So I did leakdown, had air leak at dip stick and valve cover, So I asumed head gasket. Pulled head and found 3 head bolts on passenger side had carbon deposit bluid up really bad, So replaced head gasket all surfaces clean and flat. Still didn't fix it!! My symptoms are better than before hd but still have a engine shake and flashing cel at 55 plus mph and p0303 pending! Coils tested good but going change them any way tonight!I'm stuck on this one checked everything 3 times and then again...
View 7 RepliesGot a 1996 Ford Ranger with the 4.0L in it that has a misfire on the #3 cylinder and giving check engine code: P303. Have tried new plugs, wires, distributor, switching out the coil pack with a known good, checked injectors for pulse, checked injectors, moved injectors and still the misfire remains on #3. Removed the valve covers and all appears to be well.
View 14 RepliesI own a 2010 Seat Leon 1.4 TSI 125hp 6 speed manual with 20000km (same engine, transmission, electronics as a Golf - 1.4TSI 123hp or Audi A3 - 1.4TSI 125hp, in North America you can consider it a poor mans VW or Audi, i prefer Audi LOL).
Ever so often maybe once a month when the engine is cold (usually during cold weather and in the morning) the following happens:
I crank the engine and get a really rough idle that's about 300-500rpm... the engine struggles and then shuts off after about 5-10 seconds and while this is happening the CEL an EPC light are on. after the engine turns off by its self, the next time I start the engine it works perfectly.
I have taken the car to a certified VW workshop since its under warranty (4 years) several times and they have found no fault codes. The second time I took the car they flashed the ECU to the newest software. The other day (Fourth time) after the above happened again.. they hooked up the car to the diagnostics tool in front of me to prove there are no fault codes stored. I left the car for testing and they came up with nothing.
My wife started our '99 Explorer last week and she said that the engine was rattling. I started it up when I got home and it sounded like something had let loose in the engine. We took it a local mechanic and he basically said that the motor was shot. I pulled the codes and it doesn't look good to me but I'm not a mechanic. Codes are:
P0301
P0302
P0303
P0173
I recently purchased a 1996 Ford Ranger with the 4 cyl. engine. The first 10 days I owned it it ran just fine. I then took a an hour drive to another city. After the first few stops there, as the temperature outside reached about 90, It started to sputter and idle very badly. After I got rolling it would would run fine. I decided to try to make it home. It ran fine at freeway speeds of about 70 mph. I had to stop once; it stalled out and would not start again. After waiting about ten minutes I tried again. It was still running rough, but I was able to get rolling and drove the rest of the way home without any problems until I was in town and had difficulty keeping it running at idle.
The next morning it ran fine again. A local mechanic changed the fuel filter, but the problem came back as soon as the temp neared 90 degrees. A mechanic friend who witnessed the problem said that it definitely sounded like a lack of fuel and not an electrical problem. Is there a way to troubleshoot without swapping parts? If the fuel pump is failing in warm weather, how is it possible that it runs fine at 70 mph, but not at idle? Engine temp gauge looks good. I did get one code after it died the first time (lean mixture, I think he said).
I own a 2000 Ford Escort ZX2 with an automatic transmission. I also own a 1991 Fleetwood Cadillac with an automatic transmission. Each car has its own situation.
The ZX2 idles high (about 1000 RPM) and rumbles pretty roughly while idling. I was curious as to what the cause might be.
The Cadillac has a blown head gasket and I was wondering how expensive and what would go into fixing this myself or just how much it would run going through a dealer.
It's a 05 Kia Rio. I've recently put a bit of work into it due to a few issues which were fuel related, namely replacing the fuel filter/pump. It also has brand new spark plugs. That solved the issue that originally put it on blocks for a few months and it ran fine for the past few weeks.
Today I went outside to drive to work and got the symptoms in the title. I know it's not a spark issue because it does start, and I used it on accessory to air up my tires this morning.
I'm just not sure where to go next. I've done a bit of searching and have found recommendations for checking the grounds and the distributor cap.
While running at rough idle, depressing the accelerator makes it die faster, rather than keeping it running. It rained last night and this morning. It's about 70 outside instead of the 80-90 it's been the last few weeks. No check engine light, but I've only tried to start it about 10 times.
I bought a 1987 Chevy Celebrity for $700.00. Initially it ran fine after just a slight hesitation when the accelerator was first pressed. With a little more gas applied it smoothed out and ran well. Yesterday I took a drive to the library. On the way the engine stalled. After a minute or so I was able to restart the engine and proceeded to the library. On the way home the engine again stalled. I was able to restart the engine but it idled roughly and stalled as soon as the accelerator was pressed even slightly. I tried varying the amount of gas applied from very little to pressing the pedal to the floor to rocking the gas pedal to no avail. So; idles roughly, stalls when gas is applied.
View 8 RepliesI have had this problem since day one. The idle seems to be very rough once you give it some gas and drive the car it runs smooth as silk. The dealer told me that is the wayit should be due to the narrow V6 with one head cylinder. I have had an 02 Passat V6 and I dont remember it having a rough idle.
My other issue is again since day one when I am moving very slow like when I am backing out of my drive way there is what I would describe as a grinding sound. It does it all the time forwards and back, all day not just the first thing in the morning. Again the dealer says it is normal.
I just had my first oil change about 2 weeks ago and was hoping these were just thing that would be addressed then but they dont seem to be better or worse always the same.
1993 Buick Regal 3.1l V6 Multiport injection
Problem: The care currently has a hard start, and a fluctuating idle. I bought the car a year and a half ago it still has low miles about 94,000. The care used to start fine but had a fluctuating idle in the range of 750 to 2500 rpm. My brother who is a mechanic and doesn’t live near, do all the gaskets when he visited. Then the idle fluctuation dropped to 750 to 1000rpm, when the car rpms fluctuate there is a whirring sound I can hear from the cab, like a pump or pull system. On occasion there is a vibration as well but it is inconstant and irregular. Fuel pressure seems to fluctuate as well. If the car will not start I give it a little gas and it will run fine after a minute or two, but then the idle starts to fluctuate.
No fuse issues I can tell and relays seem to be fine.Checked for lose wiring connections found, none. I have replaced:
- Hoses and gaskets
- Starter motor
- Battery
- Fuel Pressure regulator
- Fuel Filter
- Spark plugs and wires
- TPS
- Idle Air control Valve
- Crank shaft sensor
- PCV.
Right now I’m thinking it could be the fuel pump (a nightmare to change on this car), a fuel injector failing, and the ignition switch.
I've read a lot on hear but can't seem to find what I need. I just replaced one of the battery cells. Now when I drive for about 20 min the engine idles high and the energy read out stops charging the hybrid battery. The AC recirculation turns off on its own. I have a few codes. the O2 sensor and cat code. The p3006. I had one cell that i didn't replace that was reading 6.9 volts. I thought that it would charge back up on its own. We went of vacation for 2 weeks and the car didn't get driven. I found out that's not good for an older prius.
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