"My car misfires, idles poorly, runs rich and it

[Neil.Hamilton@kctcs.edu]

Fred,

Please let me know whenever you find out about this one.  I've been fighting
it for some time now.  I suspect that it is due to a cracked header, but you
wouldn't think it would make it run rich unless the O2 sensor is detecting
the extra air in the exhaust stream and causing the mixture to run rich.

Thanks, Neil

1992 w/ALL the bolt ons and then some :)

Hello everyone,

First, thanks for all your initial replies to my thread.
I've been busy with work the last two days so I hadn't had much chance to
try some of your suggestions but here are some updates.

One of your suggestions was:
"Try having someone hold the engine at 2500rpm and removing an injector
connector on all cylinders.
If the engine runs the same after all have been removed then that leaves the

ignition system or
bad fuel injectors. However if 1 cylinder doesn't change then that leaves
either spark miss-fire or a
faulty fuel injector. Also try pull any codes that is stored in the ECU. "

Well, I've tried disconnecting the fuel injector connector on all cylinders
while the car was idling and as soon as I unplugged one of the connectors,
the car would almost die so I'm guessing that the injectors are not the
cause of my problem. I've also unplugged the MAF sensor while the motor was
running and the idle rose a bit. I then assummed that my MAF sensor is
working. Then as some of you suggested, I've resetted the ECU by turing that

little screw clockwise for 2 sec or more and then turning it
counter-clockwise. Interestingly, the ECU gave me an error code: 1 long
blink and 2 short blinks. I looked up the SE-R.net site and this particular
error code refers to: Mass airflow sensor/circuit. So, is this what's
causing my problem with rough idle, rich fuel mixture, misfire and
sputtering? What should I do? Reground it? Or is the MAF sensor no good? How

would I test to see if MAF is working or not?

Please help me out. It's real frustrating!

thanks very much again!

Fred