TRIES TO STALL OR BOG DOWN.. IDLES FINE

  • Tiny
  • peter courtless
  • 1992 Cadillac Deville
  • 191,000 miles

Car starts and idles fine but after 5 minutes or so it tries to stall or bog down. Idles fine and restarts fine. Fuel pump pressure tested and fine.

Do you
have the same problem?
Yes
No
Thursday, March 1st, 2012 AT 5:29 PM

10 Replies

  • Tiny
  • JDL
  • Expert
  • 16,289 posts

When was the last tune-up? Any applicable trouble codes? When it stalls, can you tell if system is running lean or rich?

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 5:41 PM
  • Tiny
  • peter courtless
  • Member

Replaced Cap and rotor, and coil and plugs.
Cap was burned through under the coil.
AlsoIgnition control module.
No codes in the computer (current or History)
Car rarely stalls it just runs like walking in mud.(Bogging down)

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 8:28 PM
  • Tiny
  • JDL
  • Expert
  • 16,289 posts

Use a gage and check fuel pressure. Do you think it might be a tranny issue?

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 8:44 PM
  • Tiny
  • peter courtless
  • Member

Fuel pressure 45 (on not running) 41 (ideling)
Tranny seems to be same as last 3 years. Acts like an older car that timing was off a few degrees when you step on peddle.

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 9:10 PM
  • Tiny
  • JDL
  • Expert
  • 16,289 posts

Without being able to look at it, I don't know?

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 9:21 PM
  • Tiny
  • peter courtless
  • Member

What about ECM?
Or Fuel pressure regulator?

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 9:28 PM
  • Tiny
  • JDL
  • Expert
  • 16,289 posts

I don't think the regulator has a problem. Can you watch the 02 sensor signal, to see if it goes rich or lean when it stalls?

Can you cause a code to set in computer? I think there should have been a code 12, even if nothing else.

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 9:49 PM
  • Tiny
  • peter courtless
  • Member

When I get off work I will try that. Thank you.

Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2012 AT 10:13 PM
  • Tiny
  • peter courtless
  • Member

No codes come up in computer. Goes rich when bogging down.

Was this
answer
helpful?
Yes
No
Friday, March 2nd, 2012 AT 12:40 AM
  • Tiny
  • JDL
  • Expert
  • 16,289 posts

The fuel pressure looked good to me, but, does the pressure hold for a bit with engine off? Anymore the 02 sensors are part of a tune-up. I can't say that will fix it? If you cause the systen to go lean, will the 02 sensor/s react accordingly. If the 02 sensor reacts, I don't think that is the problem.

Was this
answer
helpful?
Yes
No
Friday, March 2nd, 2012 AT 2:56 PM

Please login or register to post a reply.

Similar Questions