TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

car troulble, help please

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Old Feb 14, 2003 | 04:22 PM
  #1  
TMoNeE's Avatar
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From: Fresno, CA
Car: 87 Z28
Engine: LT1
Transmission: T-56
car troulble, help please

well obviously my car doesnt love me since its valentines and doing this to me... i need some help

car wont start.

Turns over normally, just wont start up. Did it to me last night but i sat around for like half hour and then it started.. well I drove it to work this morning, and its been sitting for like 5 hours and wont start... I know this isnt real specific but Im not sure what to check or what to put so if u need to ask questions go ahead.. appreciate any help i can get.
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Old Feb 14, 2003 | 05:15 PM
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Check your getting sparking at all cylinders & check plugs.
Check fuel filter and fuel pressure.

Sounds like a fuel problem, maybe even your ecm playing up.

Last edited by CamaroUK; Feb 14, 2003 at 05:18 PM.
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Old Feb 14, 2003 | 05:34 PM
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From: Fresno, CA
Car: 87 Z28
Engine: LT1
Transmission: T-56
How do I check, I am a total novice at working on my car so dumb it down for me.
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Old Feb 14, 2003 | 05:47 PM
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I am a novice too so I only know how to check for sparks.

When the car is playing up, pull out a spark plug, attach the lead and lay the plug on the engine to ground it, then get someone to turn the ignition key while you watch for sparks. This will show how the plugs are sparking.
To check you getting a spark at all pull off the main HT lead in the centre of the distributor cap and hold it close to a metal surface, again while someone cranks it over and see if your getting sparks.

I dont know how to check fuel pressure sorry!
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Old Feb 15, 2003 | 07:03 AM
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From: Paragould AR
Car: 89 Camaro RS
Engine: 355 TBI
Transmission: 700R4
get a friend to help you and take off your air cleaner have a friend try starting your car and make sure fuel is coming out of the injector's
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Old Feb 16, 2003 | 11:57 AM
  #6  
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From: Fresno, CA
Car: 87 Z28
Engine: LT1
Transmission: T-56
took the air cleaner off... didnt see any fuel shooting out, but i dont really know where to look, so I just kinda watched and didnt see anything.
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Old Feb 16, 2003 | 03:27 PM
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Look in the two holes at the top of the engine when you have the air cleaner lid off while your friend is turning the ignition key.

If its working fine, fuel should be spraying onto each of the butterfly valves, get your friend to tap the gas pedal a few times so you can see the valves moving if your not sure where they are.

The injectors are the big lumps suspended right above these valves, two wires enter each one.

Look into the throttle body while the engine is running, its quite interesting!!! just dont drop anything down there!!!
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Old Feb 17, 2003 | 09:45 AM
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From: Fresno, CA
Car: 87 Z28
Engine: LT1
Transmission: T-56
ok, no fuel spraying.. And I dont remember if I normally do, but I don't hear the fuel pump whirring when I turn the key to on.
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Old Feb 17, 2003 | 09:49 AM
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From: Paragould AR
Car: 89 Camaro RS
Engine: 355 TBI
Transmission: 700R4
ok make sure you check the fuse for the fuel pump and i would replace the fuel relay too. and then see what happen's from there
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