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1991 Pontiac Sunbird almost start

Tiny
KJEUDE
  • MEMBER
  • 1991 PONTIAC SUNBIRD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
I have a 1991 pontiac sunbird convertable, recently it developed a "almost start" situation. Let me give tou some background. The car has a new fuwl tank, sender, pump and filter. New plugs and wires. The car will crank, and starts and idles for about ten seconds and dies. I can spray carb clean in the T.B. And it continues to run, so seems to be a fuel delivery issue. Any ideas as to a probable cause with all the new parts, what am I missing? Thanks for any help.
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Monday, March 2nd, 2009 AT 12:43 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I can spray carb clean in the T.B. And it continues to run-Does it continue to run or you have to be feeding it at all times for it to continue to run.

If the fuel pressure is correct-check the injector/s and get back with me.
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Monday, March 2nd, 2009 AT 12:54 PM
Tiny
KJEUDE
  • MEMBER
  • 9 POSTS
Fuel prssuer between 41-45 psi. Dies as soon as I stop spraying the carb clean. What should I use to check the injectore, just a noid to veryify signal or is there a resistance across the injector I should be looking for. I ask because I had a firebird 350 car that the noid lit up, but injectors still didnt fire. Drove me crazy. Replaced them out of frustration. And it worked.
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Monday, March 2nd, 2009 AT 1:15 PM
Tiny
RASMATAZ
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Your fuel pressure is okay-What liter engine is this? I need this to give the injector/s resistances-Could be the injector/s what your doing is bypassing the injector/s if the computer is energizing the injector/s-the injectors is not in the circuit
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Monday, March 2nd, 2009 AT 1:26 PM
Tiny
KJEUDE
  • MEMBER
  • 9 POSTS
Its a 3.1L
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Monday, March 2nd, 2009 AT 2:31 PM
Tiny
RASMATAZ
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Injector resistances is 8-12 ohms
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Monday, March 2nd, 2009 AT 3:24 PM
Tiny
KJEUDE
  • MEMBER
  • 9 POSTS
I had two bad injectors. #5 was reading 1.2 ohms
and #4 was reading 4.1 ohms. Two new injectors and it runs like a champ.
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Monday, March 2nd, 2009 AT 6:06 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Now you're back on the road, thanks for the donation and good luck.
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Monday, March 2nd, 2009 AT 6:10 PM

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