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Engine starts, but backfires and will not idle

Tiny
90CAMARO
  • MEMBER
  • 1990 CHEVROLET CAMARO
  • 199,000 MILES
Compression is good, 160-170psi - Rotor is pointing @#1 on tdc. Engine backfires while starting creating ball of fire ( very scary) seems like a vaccum leak - but can't find any bad hoses -wonder if fuel pump relay is bad? Spark plugs replaced 10k miles ago, new oxygen sensor, egr valve cleaned 10k miles ago -fuel pump ( in tank ) replaced 30k miles ago
gas was old. But have put several bottles of ethanol stabilzer into tank -tried but couldn't drain gas tank
I'm stumped?
1990 305 engine -was running great
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Sunday, August 28th, 2011 AT 7:46 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
What size engine is it? The V6 had a problem with the spider injectors.
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Thursday, September 1st, 2011 AT 2:21 AM
Tiny
90CAMARO
  • MEMBER
  • 2 POSTS
THE LAST LINE OF MY QUESTION STATED 305 CHEVY V-8 READ THE QUESTION!
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Monday, September 5th, 2011 AT 9:14 PM

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