On Fri, 19 Sep 2003 14:10:57 -0500, "ixlar8" <ixlar8@[EMAIL PROTECTED]
> wrote:
>This has been fdriving me nuts!
>
>1993 Cutlass supreme wit the 3.1L. At normal idle with the AC off, the
idle
>will swing from 800 to 100 back and forth til it stalls. I have checked
the
>PVC, O2 sensor, wiring, and pack. The IAC seems to be okay, I pilled it
out
>and cleaned it and reset it. No codes on the ODB.
>
>What have I missed?
>
My 90 Cutlass with the 3.1 did the same thing. Would idle when cold but
the warmer it got the more it stalled. Would always start right back up.
Had a strong "rotten egg" smell at idle too.
After checking all the easy things (ignition, vacuum lines, fuel
pressure),
I pulled the plenum off and checked the injectors. I had one completely
dead injector and another with lower flow that the rest. Never had any
codes set.
I visited my local junkyard and got 4 injectors for $20.00 (got a couple
of
extras), replaced the bad ones and now the engine runs like a champ.
Since I had one cylinder pumping only air into the exhaust the computer
was
trying to compensate for all that oxygen by richening the mixture, which
caused the engine to die at idle.
Good Luck,
Dave in Columbus
|
