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Please help me and my Firebird 3.1L 1990

Tiny
LUCHINO
  • MEMBER
  • 1990 PONTIAC FIREBIRD
  • 100,000 MILES
Hi
I write from ITALY and I apologize for my English

I have problem with my Firebird 3.1L year 1990

I start my pontiac and I race on road for 1 or 2 hours and my pontiac it starts to intermittence but it is not problem of Gas, problem of intermittence it seems electric,
intermittence starts plain and increases up to stop pontiac
when pontiac is stalls on the road it not start (motor of lighting turns well)
I have to attend 1 or 2 hours for start car

please you can help me?
which is my problem?
thanks from ITALY
Luca
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Wednesday, November 9th, 2011 AT 7:10 PM

14 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If ou go to the site here you can check the ignitionsystem it will give you step by step on how to check it. You may have a cam or crank sensor problem. Tehy may have to many ohlms and causing this. If this is a fiero and the ngine is in the rear then check the dist cap and wires, as the heat destroys them after a while.
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Wednesday, November 9th, 2011 AT 8:30 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
Ok
I will make the ignitionsystem
but my pontiac doesn't have crank sensor
I have replaced Ignition Control Module in the distributor, it is in photo
where can I find location of cam sensor?
Can I have photo of cam sensor?
Thanks
Luca
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Wednesday, November 9th, 2011 AT 9:37 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I forgot that has a distributor, your's downe'have one. Check the pickup coil it may have a broken or ready to break wire. Check for ohms.
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Wednesday, November 9th, 2011 AT 11:21 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
Hi
I am performing check
until this moment it is everything ok
do you know how to point out me location of this piece?
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Tuesday, November 15th, 2011 AT 4:50 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That is a crank sensor and it should be by the oil pan on the rh side (passenger) of the engine. That will take the place of the picupcoil. You should runa scan of the engine, you can come back to site for codes as you have an OBD1 system on your car. Cross a&b on aldl under dash on left side or steering wheel. Count flashes of service engine light for numbers, example 1 flash then 2=12 etc.
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Tuesday, November 15th, 2011 AT 5:43 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
I am desperate

I have replaced Distributor, Ignition Control Module, Ignition Coil, ECM
I have check the ignitionsystem
I have bypass vats
but does my firebird always have problem because because because? : (

I want to replace crank position sensor but I don't find location, I look for but I don't see it

help please
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Wednesday, November 16th, 2011 AT 9:32 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You don't have a carank sensor if you have a distributor. Check your fuel pressure it should be 41-47 psi, your pump may getting hot and not working. If it's below 41 then you'll need one or a fuel filter replacement. Also scan this for codes, put a jumper between a&b on aldl count the flashes.
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Wednesday, November 16th, 2011 AT 2:41 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
Hi
I have checked code of error
it is always 12 12 12. 12 12 12 12
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Friday, November 18th, 2011 AT 12:21 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That means nothing is wrong with the computer system or sensors on your car. Check your fuel pressure 41-47 psi. The pump may be failing when it gets hot. Also check your connections to the oil pressure sender as that runs the fuel pump when driving. If you oil pressure falls to low it will cut the pump off.
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Friday, November 18th, 2011 AT 2:24 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
I have checked
it seems all ok

I have gotten off Spark Plug, they is ok but them they are very wet of gasoline
it is very strange because in cables of spark of electricity it exists
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Friday, November 18th, 2011 AT 8:26 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
My advice to you is to take it to a professional who can help you out there. They still can be able to check out the basic stuff. Like compression or whether or not timing chain has slipped. I can't offer any more ideas to help you out.
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Friday, November 18th, 2011 AT 8:51 PM
Tiny
LUCHINO
  • MEMBER
  • 7 POSTS
The great problem is that my pontiac is in hands of a professional
he doesn't understand problem and me I have tried to help through your suggestions
I thank you immensely
thanks
Luca
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Friday, November 18th, 2011 AT 9:11 PM
Tiny
LUCCHETTINO
  • MEMBER
  • 1 POST
Hi
I have resolved the problem, cause of bulb oil

now I have other problem
pontiac not start and security light stay on
my pontiac has key vats, I have tried to baypass vats

thing I can do?
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Saturday, December 17th, 2011 AT 9:26 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try resetting the security system. Put key in ignition turn on and wait up to ten minutes for the light to go out. If it goes out before that fine then try to start the car.
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Saturday, December 17th, 2011 AT 9:29 PM

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