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**octaneman** · 05-27-2009, 06:51 AM

Hi Russelclan

Has anyone checked for fuel leaks ? Check the purge cannister and it's connections, after so many hands that have touched the engine it may have been overlooked. Check for vacuum leaks.Look for open and closed loop operations on the O2 sensor, use DVOM to measure resistance on the computer temperature sensor it may give a signal that the engine is at cold start.

Good luck!

05-27-2009, 06:51 AM	#2 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 564 OS: WINXP	Re: 1988 chevy 4.3 smell rich runs lean Hi Russelclan Has anyone checked for fuel leaks ? Check the purge cannister and it's connections, after so many hands that have touched the engine it may have been overlooked. Check for vacuum leaks.Look for open and closed loop operations on the O2 sensor, use DVOM to measure resistance on the computer temperature sensor it may give a signal that the engine is at cold start. Good luck! Last edited by octaneman; 05-27-2009 at 07:03 AM.