My 1989 Cavalier suddenly started "pouring" gas into the throttle body and
most of the gas seems to be going out the exhaust IF I can get it running.
I have to hold the gas pedal to the floor to get it started and even then it
is sputtering and putting out smoke and raw fuel. Is there some sensor that
could have gone bad or does anyone know what else could cause this problem?
The car isn't worth much so I don't want to put a ton of money into it.
Thanks a million.
If it's doing this even with the key on and engine not running, the injector
is probably leaking/shot. Otherwise, you may have something like a bad
coolant temp or intake air temperature sensor that's telling the ECM that
it's -40 degrees outside..
Robert Hancock Saskatoon, SK, Canada
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Look at the mounting base:
Where the pot metal housing that holds the injector, is cast from the
throttle body, isn't cracked. Is the fuel coming directly from the center of
Is it dripping when you turn on the key and hear the fuel pump run for a few
seconds, with the engine off, then slows down. Check for that while making
sure it's not leaking directly from the center of the injector it self and
Thanks to everyone for posting. First of all, the car is only a 2.0L 4
cylinder. The fuel is not coming out of the injector until I try to start
it. It is not dripping when I turn the key. Also, the fuel is coming
directly from the center of the injector, but again it appears to be putting
out way too much gas.
I was able to get the car running barely, although it wouldn't idle, so I
had to pretty much keep the gas pedal almost to the floor. I've also
noticed that the Service Engine Soon light is on when the car is "running".
Would there be a code set indicating the problem?
A sure sign that the ECM toasted!
But this is a seat of the pants guess, if you're anywhere the Shamokin/Mt
Carmel area of Pa. I have one I use for tests I can loan you.
But a rule of thumb, no code 12 when you ground the ALDL, it's a toasted
ECM. When you floor the pedal, you put the ECM in Clear Flood Mode, so
that's what helps you get the car to barely start, but releasing the pedal,
will cause it to stall.
I hope this helps, but again I stress. This is a seat of the pants
diagnosis, without using a professional scanner, that can cycle the injector
or the fuel pump relay. You can buy a used one for about $40.00 and just
swap the PROM's from your original to the used one. Unless you're lucky
enough to find a car that's optioned the same exact way, as far as trans,
engine and evaporative control.
The EGR isn't monitored on the 2.0/2.2 so that won't be an issue, so there
are fewer PROM's for the 2.0 than the V-6's.
Wow! I really appreciate your offer to loan me the ECM, but I am 30 minutes
West of Pittsburgh. If I understand you correctly, I can swap the ECM, but
the PROMs from the original ECM will still be OK?
You seem to be really knowledgeable on the subject. I really appreciate
your advice and it sounds like a good diagnosis to me. Your paragraph
describing the Clear Flood Mode describes my conditions exactly.
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