Mechanics

WONT RUN AT OP TEMP

1988 Oldsmobile Ciera • 65,432 miles

1988 cutless cierra 2.8 runs fine up to operating temp of 188 then falls flat on its face. Will not restart till cooled down completly. I have changed just about everyelectrical part including fuel pump filter and reg. I have rang out entire engine harness no broken wires fuel pressure fine I dont know what to do next anyone got a clue?
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Paulc3110
September 14, 2012.



Are there any trouble codes?

When it failed to restart, what is missing? Ignition sparks, fuel injectors not pulsing, fuel pump not working?

KHLow2008
Sep 14, 2012.
No codes have fuel pressure and spark. This is a good one. I do question the fuel volume though. But I cant figure out what stops the fuel pressure is good

Tiny
Paulc3110
Sep 14, 2012.
Are the injectors pulsing?
Does starting fluid works?

KHLow2008
Sep 14, 2012.
Yes starting fluid will keep it running when in this state. I will go recheck pulse @ injectors.

Tiny
Paulc3110
Sep 14, 2012.
Leting it warm up, Its amazing how good it runs when cold like brand new. Will let you know bout pulse anly take a few with no thermistat in.

Tiny
Paulc3110
Sep 14, 2012.
If starting fluid works and you have fuel pressure, the fuel injectors are not pulsing.

It could be the PCM or cam sensor has a fault.

KHLow2008
Sep 14, 2012.
Nope got pulse and pressure just warmed it up now it is in the not run state. Or should I say starts makes a few revolutions but rough ones almost like its way to fat.

Tiny
Paulc3110
Sep 14, 2012.
I thought this thing ony had a crank sensor.

Tiny
Paulc3110
Sep 14, 2012.
Any ideas?

Tiny
Paulc3110
Sep 14, 2012.
Hello, dont quit on me now.

Tiny
Paulc3110
Sep 14, 2012.
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