1993 Buick

PAUL G

MEMBER
1993 BUICK REGAL

1993 buick regal 3.8 3800;runs rough, strong smell of fuel, have replaced fuel pressure regulator;fuel was coming out of fuel line;not now but same problem

Sunday, August 21st, 2011 AT 1:21 PM

7 Replies

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.

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Sunday, August 21st, 2011 AT 3:01 PM

PAUL G

MEMBER
8 POSTS

Temp gauge hasn't worked forever, but has ran fine for a long time; fuel was coming out of smaller fuel line before replacing pressure regulator;still smell fuel, no power etc.

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Monday, August 22nd, 2011 AT 12:18 AM

RASMATAZ

MECHANIC
75,992 POSTS

Check the fuel pressure with a guage if its within specs

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Monday, August 22nd, 2011 AT 12:30 AM

PAUL G

MEMBER
8 POSTS

Ok will try that;you have specs. For pressure?

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Monday, August 22nd, 2011 AT 12:42 AM

RIVERMIKERAT

MECHANIC
6,110 POSTS

You're looking for 44-47 PSI at the regulator. Find the fuel return line and disconnect it at both ends and carefully blow it out to make sure it's clear. Also try replacing the fuel filter.