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Got fuel and spark.....car won't start

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Old May 9, 2010 | 06:12 PM
  #1  
POP6482's Avatar
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From: NE Pa
Car: 1989 Iroc-Z Convertible
Engine: 6.0 LQ4 LSX
Transmission: T56
Axle/Gears: Moser 12 bolt w/4.11s
Got fuel and spark.....car won't start

305 TPI
went to a cruise last Wednesday got in to leave and it wouldnt start. Car turns over and over not even trying to start. Now the confusion begins!

Here is what I've checked so far:
Got spark at coil and plug
Fuel Pump is engaging
Fuel pressure is up
No codes being thrown except 12 which means ECM is working
New injectors put on last year

Any help would be appreciated
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Old May 9, 2010 | 06:34 PM
  #2  
SSZ2891's Avatar
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Re: Got fuel and spark.....car won't start

are the injectors squirting? only thing i could think of is that the pump is engaging but maybe injectors arent working?? just a wild thought not too sure
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Old May 9, 2010 | 06:39 PM
  #3  
SSZ2891's Avatar
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Re: Got fuel and spark.....car won't start

you have fuel and spark but do you have compression? i doubt it would be that seeing it was driving fine previously though. a compression test wouldnt be a bad idea tho
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Old May 9, 2010 | 06:54 PM
  #4  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Got fuel and spark.....car won't start

Try spraying some carb cleaner down thru the intake and see if it fires up...if it does then your lacking fuel. Did you check your oil for gas to make sure you dont have a stuck injector flooding out the motor?
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Old May 9, 2010 | 06:56 PM
  #5  
one92rs's Avatar
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Re: Got fuel and spark.....car won't start

put some gas on a rag. remove the air cleaner tube to the throttle body. hold the soaked rag in fron of the intake WITHOUT LETTING IT GO and see if it starts.
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Old May 10, 2010 | 05:12 PM
  #6  
POP6482's Avatar
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Joined: Mar 2004
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From: NE Pa
Car: 1989 Iroc-Z Convertible
Engine: 6.0 LQ4 LSX
Transmission: T56
Axle/Gears: Moser 12 bolt w/4.11s
Re: Got fuel and spark.....car won't start

just went out to the gargage and sprayed carb cleaner through the intake and the car fired right up. Throttle was a little hesitant at the start. Took it for a ride up the street and seemed to clear up. I turned the car off and started it multiple times without any problems. I am leaning towards the injectors not delivering enough fuel during ignition. My brother and I are going to check them in a little.

Thanks for everyones help.
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Old May 10, 2010 | 06:21 PM
  #7  
POP6482's Avatar
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Joined: Mar 2004
Posts: 250
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From: NE Pa
Car: 1989 Iroc-Z Convertible
Engine: 6.0 LQ4 LSX
Transmission: T56
Axle/Gears: Moser 12 bolt w/4.11s
Re: Got fuel and spark.....car won't start

Turned out to be the TPS. After the car was running, I checked for a code. Got a code 21.
THANKS AGAIN!
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Old May 15, 2010 | 10:56 PM
  #8  
chas0218's Avatar
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Joined: Jun 2008
Posts: 660
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Got fuel and spark.....car won't start

Originally Posted by POP6482
Turned out to be the TPS. After the car was running, I checked for a code. Got a code 21.
THANKS AGAIN!
glad to see you got her running
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