car stalls out and back fires on WOT...
#1
Launching!
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Join Date: Mar 2004
Location: Phoenix, AZ
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car stalls out and back fires on WOT...
Here is a list of what i can think of that could be causing this problem.. its been going on for a while..
Incorrect PCV system setup. I have no PCV valve.
Leak in the exhaust. my y-pipe is not fully secured to the long tube headers. Could my O2's be picking this up and not letting me go over 3/4 throttle? I have corvette O2's.
One of my spark plug wires rests ever so slightly on the header pipe. Could this cause a problem?
I have a stripped positive battery terminal that sometimes causes my tripometer to be reset randomly.
What i have already checked...
1.) Fuel pressure does not drop off. Pump is good.
2.) MAF is good, i switched with a buddy and problem persists.
3.) Switched out MAP sensor with known good part. Problem persists.
im poor and its pretty damn cold outside which is why some of these easy fixes have yet to be resolved so please save for judgment for someone who wants to hear it lmao. thanks!
Incorrect PCV system setup. I have no PCV valve.
Leak in the exhaust. my y-pipe is not fully secured to the long tube headers. Could my O2's be picking this up and not letting me go over 3/4 throttle? I have corvette O2's.
One of my spark plug wires rests ever so slightly on the header pipe. Could this cause a problem?
I have a stripped positive battery terminal that sometimes causes my tripometer to be reset randomly.
What i have already checked...
1.) Fuel pressure does not drop off. Pump is good.
2.) MAF is good, i switched with a buddy and problem persists.
3.) Switched out MAP sensor with known good part. Problem persists.
im poor and its pretty damn cold outside which is why some of these easy fixes have yet to be resolved so please save for judgment for someone who wants to hear it lmao. thanks!
#3
TECH Regular
iTrader: (17)
Major rule of mine is "fix what you know is wrong and see what you have". Fix your exhaust leaks and battery cable and anything else you see wrong. It would be nice if you could scan the car. An exhaust leak can cause false high fuel trims which will carry over to your wide open throttle fueling. If that exhaust leak is getting to your front 02's, that's a big problem. Also, make sure you don't have any air allowed to enter the motor other than through legitimate avenues (vacuum lines and throttle body). No unmetered air must get into the engine. You can spray carb cleaner or turn on a propane torch with no flame and run the engine and listen for variances in the idle to see if you have a vacuum leak. Read your plugs to see if any stand out.