No spark

Tiny
TBACER
  • MEMBER
  • BUICK RENDEZVOUS
I have a 1992 buick la sabre with a 3800 engine and about 130k miles It was parked in the cold (around 0) and had troubles starting. One day my son couldn't get it to even crank over. It sat for about 3 weeks I replaced the battery and it would crank but would not start. I am getting fuel but I can't get a spark. I don't know what to replace. The coil pack is new because thats the only thing I could get on a suday afternoon. I am not sure how to check if the cam sensor to see if it is good or the module and I guess there are two different kinds ac delco and magnovox and ideas
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Thursday, March 1st, 2007 AT 3:15 PM

5 Replies

Tiny
CHEVYII
  • MEMBER
Hi.
Did you replace one coil or all? This really could be alot, we can try and narrow it down a bit

jim
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Thursday, March 1st, 2007 AT 5:40 PM
Tiny
TBACER
  • MEMBER
I did replace them all it was a whole unit. And I doubt that it was bad. Just my best guess when I had been outside for two hours and it was freezing
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Thursday, March 1st, 2007 AT 7:26 PM
Tiny
CHEVYII
  • MEMBER
With the age and miles on your car I would hate to start guessing but there are several components to the system, cam and crank sensors give input to the ecm and the ic module and send info to the injectors and tell them when to pulse, the ic module gets power from the ecm when the key is on you can make sure you have power there, before and after the connector, the crank and cam sensors you will need an ohm meter to check

jim
trying to be helpful
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Thursday, March 1st, 2007 AT 8:30 PM
Tiny
MCQUE
  • MEMBER
I believe that if you hook a noid light to the injector plugs one at a time and they flash when you crank the motor, that proves the crankshaft position sensor and ECU are good. So as long as you have good fuel pressure and since you changed the coil pack, the problem is probably the ignition control module. You can actually check the fuel pressure at the fuel rail port with a tire pressure guage. Pressure shoure be around 42 psi with the key on.
I don't think it can be the cam shaft position sensor as it doesn't come into play below 400 RPM. Or until the motor is actually started and running on its own.
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Saturday, March 3rd, 2007 AT 7:58 PM
Tiny
DENNYP
  • EXPERT
A failed cam sensor will cause an extended crank time. It will not cause a no start condition. Most likely problem is ignition control module. You can take it to your local big name parts store and probably have it tested there.
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Friday, September 28th, 2007 AT 12:30 PM

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