96 Monte Carlo that runs rich

Tiny
ADAMS3155
  • MEMBER
  • 1996 CHEVROLET MONTE CARLO
  • 128,000 MILES
When the car sits overnight it will start fine in the morning if you drive it for a while and it sits for a little bit and you go back to drive it you have to push the gas pedal in for it to start and when it does start it will chug and surge and smoke until it clears out.
Friday, October 21st, 2011 AT 1:18 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line

2. Defective Oxygen Sensors.

3. Leaking injectors and fuel pressure regulator.

4. Coolant temperature sensor out of calibration.

5. Restricted air intake system.
Was this
answer
helpful?
Yes
No
Wednesday, October 26th, 2011 AT 12:23 PM

Please login or register to post a reply.

Related Engine Rich Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Engine Running Rich
GUIDE
Engine Running Rich
This guide was created to show you what can cause an automotive engine to have a rich fuel mixture, which may cause black smoke to be released form the exhaust tail pipe as...
VIEW MORE