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89 firebird wont start

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Old Jun 8, 2010 | 09:15 PM
  #1  
racrx1271's Avatar
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Joined: Nov 2007
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89 firebird wont start

Car cranks but wont start, has spark. Jumped the fuel pump and could here it hum, after jumping the pump the car will start for a second then quit. When I turn the ignition on I don't here the pump hum. What should I check next? Any Ideas would be helpful.

Based on some previous replies I changed the oil pressure switch (it was leaking) checked the fusible link (had continuity, its good) changed the fuel filter and changed the relay. Still wont start. I dont have a fuel pressure tester but fuel at the schrader valve. the strangest thing is that I no longer have a check engine light so I cant check codes, I'm pretty sure its not the bulb since it was on before, dont want to pull instrument cluster to confirm. Any ideas or suggestions would be really appreciated.

Thanks Rob
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Old Jun 8, 2010 | 10:36 PM
  #2  
ATX-Iroc's Avatar
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Joined: Sep 2007
Posts: 322
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From: Bastrop, Tx
Car: 87 Iroc-Z
Engine: 305 tpi
Transmission: 700-r4
Axle/Gears: 3.42
Re: 89 firebird wont start

Find a wiring diagram and look at what it says for the fuel pump relay connector. Check all the wires that go to that connector against the diagram there should be a ground a 12v always on and a 12v ignition on and I think one more test ground that goes to the aldl port that youve been jumping and a switched ground from the computer. Post up what you find.
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Old Jun 8, 2010 | 10:45 PM
  #3  
86T/A_Ram_Air's Avatar
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Joined: Mar 2009
Posts: 870
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From: Brick, NJ
Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
Re: 89 firebird wont start

fuel pump relay?
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Old Jun 9, 2010 | 06:44 AM
  #4  
John 89 Formula's Avatar
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Joined: Jul 1999
Posts: 853
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From: Everett, MA . USA
Car: 89 FORMULA FIREBIRD, 86 CHEVY CAMARO
Engine: L98, LB9 RESPECTIVLY
Transmission: 700 R4 (BOTH)
Re: 89 firebird wont start

check the 20 amp fuse on the radiator support near the battery, it's on a red wire that comes off the pos battery cable.
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