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

Tiny
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
Tuesday, February 7th, 2012 AT 9:00 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Scan the computer for code/s and check the fuel pressure if its within specs-start here
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Tuesday, February 7th, 2012 AT 11:00 PM
Tiny
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.
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Tuesday, February 7th, 2012 AT 11:26 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you scan the computer for possible code/s
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Wednesday, February 8th, 2012 AT 4:39 AM
Tiny
KIDGRAPHIX
  • MEMBER
  • 2 POSTS
No codes as I had the battery disconnected
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Wednesday, February 8th, 2012 AT 1:01 PM

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