1987 Pontiac Grand Am fuel injection

1987 PONTIAC GRAND AM
12,800 MILES • 4 CYL • 2WD • AUTOMATIC
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HELLIANCE
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  • 3 POSTS
Car was running fine then one day it just stopped. Its a 2.5L TBI Replaced the injector started running fine then did the same thing just quit running and wont start. The injector is getting gas also replaced the tps PLZ help.
Nov 30, 2009 at 4:46 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Welcome to the forum, thanks for the donation. Engine cranking, can you see injector spray pattern? Also, with engine cranking, check for spark at the plugs. My first thought is missing rpm signal, can't be sure without testing? The rpm signal comes from the crank sensor. If you have spark at the plugs, it isn't the crank sensor.

I forgot to ask, do you have distributor or dis ignition?
Nov 30, 2009 at 4:55 AM
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HELLIANCE
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  • 3 POSTS
ignition coil
Nov 30, 2009 at 5:03 AM
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HELLIANCE
  • MEMBER
  • 3 POSTS
it doesnt have a distributor
Nov 30, 2009 at 5:16 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
OK, check for injector spray pattern and spark at the plugs. You can also check for B+ at the injector connector, key on. The computer grounds the injector in order to pulse, if there is an rpm signal.
Nov 30, 2009 at 5:58 AM
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