big problem with my car AGAIN
#31
03-17-2011, 06:38 AM
Almo, no cel's flashing
at idle you can hear the car misfiring
still can't find the problem
FML
what really sucks is that this was my "dream" car 3 years ago, and in the 36 months ive owned it, it's been at the shop for 17 months.
in 2010 i put $107 of gas in my car, and have driven it for a grand total of 8 days.
EIGHT DAYS
at idle you can hear the car misfiring
still can't find the problem
FML
what really sucks is that this was my "dream" car 3 years ago, and in the 36 months ive owned it, it's been at the shop for 17 months.
in 2010 i put $107 of gas in my car, and have driven it for a grand total of 8 days.
EIGHT DAYS
#33
03-17-2011, 08:03 AM
Almo, no cel's flashing
at idle you can hear the car misfiring
still can't find the problem
FML
what really sucks is that this was my "dream" car 3 years ago, and in the 36 months ive owned it, it's been at the shop for 17 months.
in 2010 i put $107 of gas in my car, and have driven it for a grand total of 8 days.
EIGHT DAYS
at idle you can hear the car misfiring
still can't find the problem
FML
what really sucks is that this was my "dream" car 3 years ago, and in the 36 months ive owned it, it's been at the shop for 17 months.
in 2010 i put $107 of gas in my car, and have driven it for a grand total of 8 days.
EIGHT DAYS
Hmmm... sounds like it might be the idle air control valve (IAC)?!?!
Last edited by Almo; 03-17-2011 at 08:06 AM.
#35
03-17-2011, 09:13 AM
Check any place where you have a ground harness between engine/gearbox and chassis.
However the elevated rpm at startup more seems like airleak... but theoretically you could get same effect from a problem with ground current leak that offsets your lambda/AFR readings from the sensors.
What error codes does an OBD reader show? Just misfire or something else too?
However the elevated rpm at startup more seems like airleak... but theoretically you could get same effect from a problem with ground current leak that offsets your lambda/AFR readings from the sensors.
What error codes does an OBD reader show? Just misfire or something else too?
#36
03-17-2011, 09:16 AM
I had random misfires and kept getting MAF codes. Turns out the little plastic y venturi tube to the left of the intake plenum had a hairline crack, soap and a boost test can be your best friend.
GL
Tom
GL
Tom
Vacuum leak is my guess. MAny of the vacuum leaks change to small boost leaks under load and you may not notice the effects of that small of a boost leak. But you would notice a small vacuum leak. Check the two lines on top of your DVs as well as the other vacuum lines in the surrounding areas.
#37
03-17-2011, 10:38 AM
the codes it throws is misfire in cylinder 1 2 4 5 6
mass air flow film
secondary air pump on bank 1 and bank 2 is what it says
when we reset the CEL light and turnt he car on , it sputters and dies unless we give it gas for a few seconds..
mass air flow film
secondary air pump on bank 1 and bank 2 is what it says
when we reset the CEL light and turnt he car on , it sputters and dies unless we give it gas for a few seconds..
#39
03-17-2011, 11:08 AM
Pumping gives squirts of fuel = makes it richer to compensate for lean condition.
Opening throttle gives more air = if it's drowning in fuel for some reason you can get it to run giving it more air.
Do you have very black smoke coming out in this starting phase? (= rich)
Check fuel pressure. Does the software take into consideration the FPR? Is the FPR good (Bosch Motorsport version or a "home made" version that many vendors sell?). Injector stuck is unlikely since you would only have one bank misfire from the AFR reading something strange.
If you had problem with ignition timing you would have other error codes.
MAF, connectors from MAF, connector to ECU. Also flash it back to stock sw when trouble shooting.
#40
03-17-2011, 11:31 AM
This is a common diagnostic Ive used elsewhere, it should not hurt the car, just to putz around for a bit. (NO wot, etc)
And this will literally take 1 minute to try.
A
#42
03-17-2011, 01:12 PM
it LOOKS like we found the problem
smoke test revealed a cracked intake manifold...
it's covered under warranty. let's hope this fixes the problem
smoke test revealed a cracked intake manifold...
it's covered under warranty. let's hope this fixes the problem
#43
03-17-2011, 01:46 PM
Sounds like it could cause that most definitely. Hope this solves the issue.
#44
03-17-2011, 01:59 PM
im just curious. how does an intake manifold crack ? isn't it a piece of plastic that doesnt move ? where it get stress from ?
