1995 Buick Regal

[quote:e003731d2c="ntohonnie"]Engine Performance problem
1995 Buick Regal 6 cyl Front Wheel Drive Automatic 233150 miles

My Buick Regal is giving me problems and i already asked alot mechanices and they gave me tips on differents problems . I replaces fuel pump and fuel pressure regulator and fuel filter and DIS Ignition Control Module and the problem is when you drivin the car and you turn off of engine it wouldnt start until in couple of minutes hten it will start and when you going uphill it will hesitates and the engine is running good.[/quote:e003731d2c]

What brand of fuel pump?
Sounds like a defect.
Hook up a Fuel pressure gauge to it and watch for the pressure when the symptoms happens. If the pressure falls out of spec, it is probably the pump.

IF you used anything brand other than delphi, it would not surprise me. IF you change it out again, be sure to do the filter again.

When i replaced the DIS Ignition Control Module the Engine Service Light wouldnt turn on again soo i guess everything is ok on the Ingition systems .. If u r getting a diagnosis tested would it still work evening if the Engine Service light doesnt come on ?

Diagnosing is the act of troubleshooting. A symptom can be troubleshot, a check engine light can be troubleshot.

The CEL was diagnosed (troubleshoot) and the cause was appearantly the module.

The module replacement appearantly repaired the reason for the CEL to light up.

Now you have a symptom of hesitation/lack of power. This is diagnosed or troubleshot as I said in my first post.

I hope that clears it up a little.