Question about 1995 Buick LeSabre

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No signal to injectors, need to know what gives the signal

Buick , Lasabre 1995, 3.8 , car won't start has spark and fuel pressure but no signal to injectors. poured gas down the throttle body and car fired. 2.88 volts constant to injectors.

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  • Angelo Attard
    Angelo Attard May 11, 2010

    the crank angle sensor sends information to the computer when to spark and when to open the injectors . try another computer may be faulty if you have a friend with the same car tey theres

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If voltage is on both sides of the injector your computer is bad if only on one side try a crankshaft position sensor its very common with these cars.

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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Are you missing anything else? Engine cranking, do you have spark at the plugs? Also, use a gage and check proper fuel pressure, engine cranking. Any applicable trouble codes? If your missing spark--fuel pressure and fuel injector pulse, I'd have to check for rpm signal, usually, comes from crank sensor.
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Did you test for spark? I would check spark and fuel pressure. OK, here's a little bit of working theory that'll help you to see the ‘why’ of the Noid light test.

Whether you're testing a No Start Condition or a Misfire Condition, you'll need to know if the cause of the problem is a lack of fuel. When your GM 3.8L (Buick, Chevrolet, Oldsmobile, Pontiac) does not start, it will be either because of a lack of fuel or spark. The same thing goes for when your GM 3.8L equipped car or mini-van is misfiring... that specific engine cylinder isn't contributing to engine power because it either lacks fuel or spark.

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