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

  • Tiny
  • Archie888
  • 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.

Thursday, April 26th, 2012 AT 5:05 AM

7 Answers

  • Tiny
  • mikederouin88
  • Member

It could be as simple as water in your gas

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 5:19 AM
  • Tiny
  • Archie888
  • Member

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?

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 5:27 AM
  • Tiny
  • fixitmr
  • Member

What do you mean by misfire? Engine shakes more than usual?

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 5:34 AM
  • Tiny
  • Archie888
  • Member

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.

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 5:43 AM
  • Tiny
  • fixitmr
  • Member

Check replace ECM temp sensor.

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 5:48 AM
  • Tiny
  • mikederouin88
  • Member

Possibly an ignition control module failing on the low RPM side u can test that at a local parts house

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 1:00 PM
  • Tiny
  • fixitmr
  • Member

Wow, is it really 344k miles? Engine could just be too worn out maybe a compression test is in order?

Was this
answer
helpful?
Yes
No
Thursday, April 26th, 2012 AT 1:28 PM

Please login or register to post a reply.

Similar Questions