1989 Buick Lesabre Starting Problem

Tiny
KEITH LOUIS
  • MEMBER
  • 1989 BUICK LESABRE
Car won't start on its own. If starting fuel is sprayed into the air duct it starts up right away and runs very smooth drives with out any problems. When turned off, and you try to start again it does not you have to use the starting fuel again. So far I have replaced the fuel pump, ignition coil and igniter, cmp. And ckp. Sensors, coolant temperature sensor, air flow sensor, injectors. The car runs very very smooth as soon as it fires up but it would not fire up with out the starting fuel. Have been working on this problem for months.
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Sunday, September 1st, 2013 AT 5:31 AM

4 Replies

Tiny
HMAC300
  • EXPERT
Check yoru fuel pressure should be 41-47 psi min
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Sunday, September 1st, 2013 AT 5:56 AM
Tiny
FREEMBA
  • EXPERT
Check the voltage (using a voltmeter) to the fuel injectors when you are spinning the engine over trying to start it. It should alternate between approximately battery voltage and 0 volts.

Also, check the computer codes and post them here. This way we'll have a good starting point in diagnosing the problem (otherwise we'll have to check everything!)

What size engine does you car have.
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Sunday, September 1st, 2013 AT 6:45 AM
Tiny
KEITH LOUIS
  • MEMBER
The fuel pressure is within specs, and there are no codes in the system. However during cranking the voltage at the injectors is never more than.52 volts, but when I get the car is running by using the starting fuel the voltage is 12+ volts. The engine size is 3.8L.

P.S Could not check it before due to the fact that it was a public holiday.
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Tuesday, September 3rd, 2013 AT 7:36 AM
Tiny
HMAC300
  • EXPERT
If you can spray fuel and it runs it sounds like a fuel problem. Get your igniniton mocule checked auto parts store can do this, you may not be getting ignition for the injector s to work. Also when you test fuel pressure it should hold pressure for 5 minutes after the key is off if not then check regulator. Also check cranks sensor connector as it may be bad. This cold be a pcm or prom problem as well.
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Tuesday, September 3rd, 2013 AT 7:48 AM

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