Engine cranks but wont start has been sitting for 3 weeks ran fine when parked

KIDGRAPHIX

MEMBER
1996 CHEVROLET BLAZER
250,000 MILES

Vehicle was running fine when parked put fresh gas and heet(red bottle) in tank vehicle wouldnt start replaced starter, checked fuel system, battery and injectors were replaced less than 6 months. Engine will backfire or cough once in while randomly while attempting to start, distributor and rotor camshaft sensor all new within 6 months, symptoms I have noticed may or may not be related, Headlights on high beam will switch back and forth to low and high while engine idling/while turning over engine will seize and dash lights will flash speedometer needle will jump and go back down turn key off and will turn over again

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Scan the computer for code/s and check the fuel pressure if its within specs-start here

Was this

answer

helpful?

Yes

No

Tuesday, February 7th, 2012 AT 11:00 PM

KIDGRAPHIX

MEMBER
2 POSTS

Checked fuel pressure within specs 60-65 psi everything seems to be functioning as engine will backfire and cough when trying to start.I have noticed that while cranking it will seem like compression slows the starter (brand new as of today) and it will quit cranking until the key is turned off. The engine will also roll back from the compression speedometer needle will jump to like 60mph then gradually go back down or stick til key is turned on again which it will turn over fine for 10-20 secs and it will do the same thing again. It seems as if it is electrical related but other than battery, starter(new) and alternator and (all new)distributor rotor camshaft sensor wires and plugs I dont know what to check for.