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Old 05-17-2013, 11:06 PM   #1
soon2bsoobie
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Default help my car runs like crap

hey guys ok so here is what happened i was driving yesterday and out of nowhere car stalls while sitting at a light. i thought ohh thats weird so i turned car back on car starts. ok so then driving a few feet away huge backfire from the car thought i blew my motor. but car ran fine but cel came on and flashing cruise light. i check it later and it comes up as camshaft position sensor bank 1 so i switched that sensor and my friend said it could also be my maf sensor so changed that too. the car still runs like crap but no cel any ideas as to what could be the reason? the current mods on the car are tbe catless, intake, and open source tune. any input would be very appreciated thanks guys.
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Old 05-18-2013, 12:02 AM   #2
cosseywrx
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You reset the ecu?
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Old 05-18-2013, 01:42 PM   #3
Sypher
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Eh you popped off an intercooler pipe. Do a boost leak test. Also check your connections to your fuel rail and injectors. Also I would check your fuel pump as well, or check your fuel pressure, You may just have a bad tank of gas as well. Also it maybe time for spark plugs.
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Old 05-18-2013, 05:02 PM   #4
soon2bsoobie
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thanks guys will check i dunno if its plugs though the car only has 77k miles on it and 60k service was done last year
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Old 05-19-2013, 02:43 PM   #5
soon2bsoobie
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Update so the car has no cel anymore as i changed both cam shaft position sensor and maf sensor but the car still runs like crap and its running lean im scared to drive it cuz i dont want the motor to pop anyideas why its running lean? Could it be a timing issue
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Old 05-20-2013, 10:18 AM   #6
Andrewxxcarlson
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Like stated above, boost leak.
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Old 05-20-2013, 11:07 AM   #7
RemlapaN
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Quote:
Originally Posted by Andrewxxcarlson View Post
Like stated above, boost leak.
Boost leak on a MAF car would make it rich, not lean. OP stated it was a lean condition.


OP: When was the last time you replaced the fuel filters? Any chance you got bad gas or water in your gas? This seems more like a fueling issue to me.

Could also be a timing belt (could've maybe skipped a tooth)
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Old 05-20-2013, 12:53 PM   #8
Andrewxxcarlson
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How does OP know he's running lean and under what conditions? In boost? Open or closed loop? Idle?
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Old 05-20-2013, 03:48 PM   #9
soon2bsoobie
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i have an aem wideband and its reading lean on my daily driving throttle im not flooring it its about i'd say 30% throttle just cruising and not when im boosting when i boost its fine but only when in vaccum its running leaner than usual in the 17 area where usually its around 15 and when boosting its normal like i said. i will check when the fuel filters were changed and most likely change them thanks for the help guys
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Old 05-20-2013, 04:28 PM   #10
Andrewxxcarlson
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Quote:
Originally Posted by soon2bsoobie View Post
i have an aem wideband and its reading lean on my daily driving throttle im not flooring it its about i'd say 30% throttle just cruising and not when im boosting when i boost its fine but only when in vaccum its running leaner than usual in the 17 area where usually its around 15 and when boosting its normal like i said. i will check when the fuel filters were changed and most likely change them thanks for the help guys
So it's having issues in closed loop? Other then the suggestions above, what tune ya runnin? What intake and stock bpv?
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Old 05-20-2013, 05:50 PM   #11
Leafy
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Lean out of boost but fine in boost, sounds like an ari leak post turbo. Lean all the time would indicate an air leak between the maf and turbo.
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Old 05-22-2013, 12:38 AM   #12
soon2bsoobie
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i have a k&n typhoon intake and stock bpv and the car is on an open source tune its not tuned aggressively either only pushing 18lbs of boost i will try to check my turbo inlet tomm mayb there is a leak there. could that possibly be why its lean out of boost?
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Old 05-22-2013, 06:04 AM   #13
dstroy
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Quote:
Originally Posted by Leafy View Post
Lean out of boost but fine in boost, sounds like an ari leak post turbo. Lean all the time would indicate an air leak between the maf and turbo.
Leak past turbo = rich condition, because more fuel and less than metered air.

Leak pre-turbo and post maf = lean because unmetered air and only fuel for metered air.

Check your inlet.
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