1986 Chevy Camaro Will Not Start.

Tiny
BRIANRIGGAN27537
  • MEMBER
  • 1986 CHEVROLET CAMARO
Computer problem
1986 Chevy Camaro 6 cyl Two Wheel Drive Automatic

If you can get this one, youre good. Ok so I have 45 pounds of fuel pressure to the fuel rail schrader valve, a nice bright blue spark, new plugs, wires, ignition coil, distributor, all components inside distributor, ecm, battery, pretty much everything in the ignition system has been replaced. The engine will turn over but just will not fire at all. Its a 2.8 V6. All fuses and relays are fine. Any suggestions will be IMMENSELY appreciated.
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Friday, May 30th, 2008 AT 2:46 PM

16 Replies

Tiny
BLACKOP555
  • EXPERT
Hook up a noid light to each injector harness and crank the vehicle, let me know if it flashes, illumintates and not flash or not light at all.
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Friday, May 30th, 2008 AT 4:03 PM
Tiny
BRIANRIGGAN27537
  • MEMBER
Also, the fuel pump does not come on when the key is turned, but it checks out fine along with the relay.
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Wednesday, June 11th, 2008 AT 1:05 PM
Tiny
BLACKOP555
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Please post back all the informations passed via email.
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Wednesday, June 11th, 2008 AT 10:37 PM
Tiny
BRIANRIGGAN27537
  • MEMBER
Ok the original problem was that the car wouldnt start. I replaced the distributor and all the components inside it, the ecm, the ignition coil, and probably a couple things im sure im forgetting to mention. Anyway I later discovered that the fuel pump would not come on when I turned the key, so my first thought was the relay, but it checked out fine. So I ran a jumper wire from the battery to the ecm diagnostic port under the dash to energize the fuel pump that way, and it came on. I then tried to start the engine while energizing the fuel pump manually, no go. Im getting perfect fuel pressure and a perfect spark, so then I realize the injectors arent working either. Thats when you told me to do the noid light test, which I did (with all the connectors unplugged at once) to discover theres no power to the injectors at all. The car WILL run when I spray starting fluid into the throttle body, but only until it burns that up, so about three seconds. So in a nutshell, no fuel pump when the key is turned, and no injectors either, which sounds to me like the entire fuel system isnt working. And now here we are. And keep in mind this is not a neglected vehicle, ive always taken excellent care of everything, im the type that hates dirt and dust under my hood, the car has always ran perfect. Would a faulty ignition switch cause any of this maybe? Or what about a bad oil pressure sending unit?
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Thursday, June 12th, 2008 AT 11:02 AM
Tiny
BLACKOP555
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At the relay jump the 2 terminals that the relay connects to turn on the pump on and off, do you have power to the pump then? If not your not getting power to the relay and you should suspect ignition switch.

You may have a injector relay also if no power is getting to that or to the injector harness if no relay I would check the ignition switch also.
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Friday, June 13th, 2008 AT 11:46 AM
Tiny
BRIANRIGGAN27537
  • MEMBER
Yesterday I installed a brand new ignition switch and no change. I heard that if the oil pressure sending unit is bad then the computer will cut the fuel to the engine, is this true on my car? . And if it is, the oil pressure gauge in the dash does register, but it jumps up and down pretty frequently, can the sending unit still be bad?
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Saturday, June 14th, 2008 AT 8:19 PM
Tiny
BLACKOP555
  • EXPERT
I belive yours may run through the guage! Did you notice this before the vehicle started to not start?

Try making sure the connector is tight and if you want you can try a new oil pressure sensor/send unit.
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Saturday, June 14th, 2008 AT 10:19 PM
Tiny
BRIANRIGGAN27537
  • MEMBER
Yea the needle was jumping around before everything went crazy. I swear if its the sending unit, the twelve dollar sending unit after a hundred dollar computer and whatever else I replaced trying to figure this out, im gonna have a breakdown. :) The connector is nice and tight I know, so ill just replace it and see. *Sigh* thanks yet again.
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Sunday, June 15th, 2008 AT 7:21 PM
Tiny
BRIANRIGGAN27537
  • MEMBER
I have replaced the oil pressure sending unit and still no change. Im out of ideas. I would really rather not send her to the graveyard. You got any more?
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Monday, June 16th, 2008 AT 5:26 PM
Tiny
BLACKOP555
  • EXPERT
Did you try splicing in a positive line into the injector harness and in the pump so the pump runs as soon as your trying to crank it?

Does that start it?

Do the injectors pulse if + voltage from the battery is spliced in the connector, ill try and draw you up a diagram.

I have bad penmanship so hang with me!
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Monday, June 16th, 2008 AT 5:36 PM
Tiny
BLACKOP555
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http://www.2carpros.com/forum/automotive_pictures/66751_graph_1.jpg

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Monday, June 16th, 2008 AT 5:46 PM
Tiny
RASMATAZ
  • MEMBER
@ the injector harness do a continuity test on the light blue and light green wire all the way to the computer. Check all injector fuses.

The computer might not be picking up the distributor reference signal Lo/Hi therefore the quad/ground driver is not pulsing the injectors.

The fuel pump should come On when key at run position for 2secs if not possible causes is the fuel pump fuse/fuel pump relay/fuel pump itself or the computer F/P control relay-

When the engine fires up after the 2secs interval the OPSU takes over the power to the fuel pump.


http://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_57.gif

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Monday, June 16th, 2008 AT 6:29 PM
Tiny
RASMATAZ
  • MEMBER
Try rechecking your spark again and tell us whether you still have it-
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Monday, June 16th, 2008 AT 6:41 PM
Tiny
SLVERSTANG234
  • MEMBER
Same things wrong with my car, the switch is bad and the computer tells the car not to send power to the pump. I just dont know where the oil pressure switch is and how to get to it.
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Wednesday, January 28th, 2009 AT 8:40 AM
Tiny
BLACKOP555
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What seems to be your question?
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Wednesday, January 28th, 2009 AT 9:16 PM
Tiny
SLVERSTANG234
  • MEMBER
Wheres the oil pressure switch>
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Thursday, January 29th, 2009 AT 8:37 AM

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