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Old 03-23-2004, 01:36 PM   #1
tEkkGOD
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Default My WRX is misfiring all 4 cylinders, gurgling, backfiring, and smoking...

this saturday i took my car out to run it a little and it felt like it had dirty gas. it would kinda gurgle a little and almost turn off.
then it will go back to normal. at a stop light, i tried taking off and the car barely went because it was misfiring. i pushed the pedal all the way WOT and still the same... couple of seconds and its back to normal. going home it turns off on me at a light. i start it back up and it smokes for a bit and then its normal. sunday it ran a bit better as i calibrated the TPS on the UTEC. but it still misfired. i got the CEL's checked and they were only misfires 1-4. nothing else. i went home and it acted fine. monday, i took the wrx to work and it felt great. my cousin called me to pick him up about 20 miles away and it felt great getting over there. then, as we left, the car started gurgling/misfiring again. this time more than ever. it was smoking white and barely moving and it wiould turn off if i got off the pedal.it wouldnt go back to normal, the only way to keep it alive was to give it gas. i was in the ghetto so i tried taking it as is. it smoked the whole way and barely had any power. it turned off at every stop. i stopped at Burger KIng to eat lunch so maybe the car would magically go back to normal. NOPE. still the same, so i cruised the feeder smoking like crazy and backfiring bombs. while it was going slow, i decided to give it more gas and as it got into the higher rpms, it got kinda back to normal so i drove in the freeway at high rpms but still kinda misfiring, and not smoking tthat much anymore. well the car went through 5 gallons of gas this way on a 20 mile trip!!! it finally got back to normal after i had to refuel. i just changed the spark plugs about a month ago and also the fuel filter. the only thing that i can think of that are bad are the plugs or the coil packs.
it wasnt burning any oil, and i checked the oil level-normal.
ive got about 81k miles on the car and have never had a problem.
what can it be?
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Old 03-23-2004, 01:41 PM   #2
PaulRex
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Well if the plugs werent bad before, they are probably fouled now anyway..
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Old 03-23-2004, 02:21 PM   #3
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Umm maybe the plugs. I would start checking outerh things. Was it cold out?? Did you compensate for the extra fuel the ECU is now dumping in the engine? Sounds like your engine is flooding out. First check your oil to see if you smell / see gas in it. If not you still have a chance. Did you get the tuning done somewhere or did you do it yourself? Do you have a wideband?
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Old 03-23-2004, 03:05 PM   #4
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Our 2000 2.5 RS was doing this exact same thing. turns out the coil pack was bad and one of the Spark plug wires was corroded. I would check these out if I where you it is the wierdest feeling. you have to floor it to keep it alive and then it bucks and chugs then fine then happens again right? if so this is exactly what happened to ours.
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Old 03-23-2004, 05:13 PM   #5
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Quote:
Originally posted by DirtDevil
Our 2000 2.5 RS was doing this exact same thing. turns out the coil pack was bad and one of the Spark plug wires was corroded. I would check these out if I where you it is the wierdest feeling. you have to floor it to keep it alive and then it bucks and chugs then fine then happens again right? if so this is exactly what happened to ours.
well im going to check these out as im replacing my spark plugs

i have a bad feeling its the coil packs


how expensive are they or how can you test them?
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Old 03-23-2004, 05:15 PM   #6
tEkkGOD
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Quote:
Originally posted by F22-Raptor
Umm maybe the plugs. I would start checking outerh things. Was it cold out?? Did you compensate for the extra fuel the ECU is now dumping in the engine? Sounds like your engine is flooding out. First check your oil to see if you smell / see gas in it. If not you still have a chance. Did you get the tuning done somewhere or did you do it yourself? Do you have a wideband?
not cold out
ive checked my oil and its full
i smell gas in the exhaust

i got tuned by a reputable tuner

i dont have a wideband;(
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Old 03-23-2004, 07:01 PM   #7
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Ok then it I would say your internals are proly good. Check your coils.
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Old 03-23-2004, 07:35 PM   #8
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yeah check your ignition parts like they said,

if you have your stock ecm laying around anywhere that may be helpful to try and see if it works without those symptoms. if not then surely your engine has a big problem
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Old 03-23-2004, 08:41 PM   #9
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So your car is back to normal after a new tank of gas, am I reading that right?

You'll find out when you pull the plugs if any damage happened, but if your car cleaned up on a fresh tank, it's probably just that you got a crummy tank of gas.. or somehow, someone poured some foulness into your tank when you weren't watching??

Might want to put a new fuel filter on.. then cut open the old one to see if any gunk is in there. If so, I would think an injector cleaning would be in order.

Hope it works out, keep us posted.

-James
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Old 03-24-2004, 09:21 AM   #10
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run with the stock ecu for awhile if you can
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Old 03-24-2004, 09:40 AM   #11
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Your pug is stuck in the intake.
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Old 03-24-2004, 09:59 AM   #12
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Try the front O2 sensor? Maybe she's going bad. See if someone local will swap with you- it might be the problem.
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Old 03-24-2004, 11:18 AM   #13
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If you're not using larger injectors then first pull your UTEC out and run the stock ecu (at stock boost levels). If everything works as it should then the MAF circuit could be bad on the UTEC (or you just placed a wrong value somewhere).

If you still have a problem then check the resistance on the coil packs.

Good luck.
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Old 03-24-2004, 11:18 AM   #14
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I had the *EXACT* same problem last week, after switching plugs/coils/coil position, double checking compression and doing a million other things, all i can say is if you're on stock injectors liek i am RUN THE STOCK ECU FOR 150 MILES, IF THE PROBLEM GOES AWAY CALL TURBOXS.
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Old 03-24-2004, 12:59 PM   #15
tEkkGOD
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the car is not back to normal after a fresh tank
if it was bad gas at first, it wouldnt have consumed 5 gallons in 20 miles!
the fuel filter and spark plugs were replaced about a month ago prior to getting tuned on a dyno.
the injectors are sti 550's
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Old 03-24-2004, 01:00 PM   #16
tEkkGOD
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Quote:
Originally posted by Element Tuning
If you're not using larger injectors then first pull your UTEC out and run the stock ecu (at stock boost levels). If everything works as it should then the MAF circuit could be bad on the UTEC (or you just placed a wrong value somewhere).

If you still have a problem then check the resistance on the coil packs.

Good luck.
Phil (motoxphil)
www.elementtuning.com
what is the resistance supposed to be on a coil? and how do i check it?
thanks.
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Old 03-24-2004, 01:35 PM   #17
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Pull the IC off and look for large amounts of oil..... I had a customer with alot of the same problems you are listing and it turned out that a seal in his turbo (aftermarket) had let go and sent a ton of oil through the system.

Replaced the turbo and hasn't had the problem since.

Snowman
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Old 03-24-2004, 02:08 PM   #18
tEkkGOD
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Quote:
Originally posted by Snowman
Pull the IC off and look for large amounts of oil..... I had a customer with alot of the same problems you are listing and it turned out that a seal in his turbo (aftermarket) had let go and sent a ton of oil through the system.

Replaced the turbo and hasn't had the problem since.

Snowman
Bad spellers of the world, UNTIE!!!
rofl @ bad spellers comment.

i doubt thats the problem because as i had mentioned earlier in my huge paragraph, the car consumed 5 gallons of fuel in 20 miles. the oil lever was still full. i will still check though, just in case.
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Old 03-24-2004, 05:31 PM   #19
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I've been having this problem for the past few days. I just pulled the car out of storage from the winter. Gone threw 2 tanks of gas and car is still acting funny, check everything listed above and still nothing out of the ordinary. I have noticed that it on;y seems to happen in the morning after the car has sat for the night, but when I leave to go home from work, the car feels fine but yet it sat all day. Makes no sense, the other thing I've noticed is that at cruising speeds the car is running hotter then normal too, I'm going to pull the plugs again and give them a good cleaning and make sure there isn't any corrotion (sp) in the coil packs.
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Old 03-24-2004, 06:14 PM   #20
Snowman
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Quote:
Originally posted by tEkkGOD
rofl @ bad spellers comment.

i doubt thats the problem because as i had mentioned earlier in my huge paragraph, the car consumed 5 gallons of fuel in 20 miles. the oil lever was still full. i will still check though, just in case.
This guy had the same problem. He was getting about 90 miles per tank.

Snowman
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Old 03-25-2004, 09:52 AM   #21
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I traced my problem to my remote switch not working properly on my utec....the car has been running in stock mode for the last week instead of my tuned map for stg 4+.....time to pull the wires out and see whats up....
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Old 03-25-2004, 12:51 PM   #22
tEkkGOD
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Quote:
Originally posted by WRXOwner7
I traced my problem to my remote switch not working properly on my utec....the car has been running in stock mode for the last week instead of my tuned map for stg 4+.....time to pull the wires out and see whats up....
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