View Single Post
  #2  
Old 05-21-2013, 09:03 PM
Tech II Tech II is offline
AF Fanatic
 
Join Date: Jul 2011
Posts: 5,017
Thanks: 70
Thanked 618 Times in 610 Posts
Re: 94 Buick Regal Limited Starting Issues

Is it possible what you have in your hand, plugs into the underhood light?

I'm not sure if the other lead is the test lead for the fuel pump......

I assume the vehicle cranks over ok, it just doesn't start....

This is one of the easiest things to diagnose.....

On your vehicle, the usual problems are the crank sensor, ICM, MAF, fuel pump, etc.

First do you have fuel pressure? Should be about 40 psi......if no fuel pressure, see if vehicle starts when you spray carb cleaner into the intake....

Next, do you have spark on all cylinders? If no spark, crank sensor or ICM...

Next, do you have injector pulse(you will need a noid light)? If none, but you have spark, ICM or ECM.....

Try starting with the MAF disconnected.....

Have you checked for codes?

I would be leaning towards a crank sensor.....if your vehicle starts, find the crank sensor...it sits in a metal pedestal......practice tapping(lightly) the pedestal with a long extension, not the sensor or harness, with the engine NOT running....notice how close the serp belt is......once you are good at lightly tapping just the pedestal, now start the car.......let it get to normal operating temp......now be VERY CAREFUL as you tap that pedestal, lightly, because that serp belt is moving......if the engine stumbles or stalls, you found your problem.......but once again be very careful, and PRACTICE tapping the pedestal with the engine not running first.....this is not fool proof....nothing may happen and the sensor may still be bad......but if it does react to the tap, replace the sensor.....need a special tool to set the gap on the new sensor.....
Reply With Quote