Mechanics

MY CAR MISFIRE'S AT LOW RPM AND ONLY IN THE MORNING OR WHEN THE CAR IS VERY COLD, WHAT CAN IT BE?

1992 Opel Monza • 344,000 miles

It's a 2 liter 8 valve, I've changed the plugs, the fuel filter and the coldstart idle valve.
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Archie888
April 26, 2012.




It could be as simple as water in your gas

Tiny
Mikederouin88
Apr 26, 2012.
But only when its cold and on low rpm, from 2000rpm and up it revs clean and idles right and when its temp starts picking up the misfire is gone?

Tiny
Archie888
Apr 26, 2012.
What do you mean by misfire? Engine shakes more than usual?
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Tiny
Fixitmr
Apr 26, 2012.
The engine doesn't rev clean, it struggles to rev up til it hits 2000rpm and then it revs clean. Basically the engine runs un even and not properly.

Tiny
Archie888
Apr 26, 2012.
Check replace ECM temp sensor.

Tiny
Fixitmr
Apr 26, 2012.
Possibly an ignition control module failing on the low RPM side u can test that at a local parts house

Tiny
Mikederouin88
Apr 26, 2012.
Wow, is it really 344k miles? Engine could just be too worn out maybe a compression test is in order?

Tiny
Fixitmr
Apr 26, 2012.

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