2000 Chevy Blazer 4.3 - Runs & Drives great MOST of the time. Ocassionally without warning will not start, getting no fuel. Replaced pump & all the normal fuel issue parts. Gives no code when problem occurs. Had SEVERAL Well respected shops try to solve problem (After Many $'s) with no luck. After car starts may be several weeks before it happens again. This has been going on for 2 years Any Suggestions
Check for loose connections. The fuel pump relay could also be faulting intermittently.
October, 3, 2011 AT 12:52 PM
Have already checked all connections will replace relay.
BTW: It did it again lastnight, used gas thru throttle body.
Would run until gas burned out & die again, did this many times with no success. Walked out this morning and it started as soon as I turned the key.
October, 5, 2011 AT 4:00 AM
Find a parts store like Autozone or Pep Boys that loans tools and borrow a fuel pressure tester. When the problem occurs, check the fuel pressure at the regulator. This sounds suspiciously like a condition known as vapor lock wherein the fuel in the fuel lines boils.
October, 5, 2011 AT 4:10 PM
Motor is always cold, usually happens after setting all night or all day. Can this still occur with cold motor?
October, 5, 2011 AT 7:23 PM
Vapor lock with a cold engine is almost unheard of. It requires heat to boil the fuel into vapor.