1992 Cadillac Deville Repair Question
Mileage: 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.
Asked by peter courtlessAnswer
When was the last tune-up? Any applicable trouble codes? When it stalls, can you tell if system is running lean or rich?
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)
Use a gage and check fuel pressure. Do you think it might be a tranny issue?
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..
Without being able to look at it, I don't know?
What about ECM?
or Fuel pressure regulator?
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.
when I get off work I will try that.Thank you.
No codes come up in computer. Goes rich when bogging down.
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.