2000 GTP Mystery

**addeible** · 03-13-2013

My grand prix has an engine stalling problem. Whenever the engine shakes, (shifting in/out of gear, bumps in the road) it wants to stall out. I have replaced the following already:

Plugs/wires
Fuel Pressure Reg
Mass Air Flow
Purge Solenoid
Checked Vacuum Lines
Replaced Injector O-rings/moved them around

It isn't throwing any codes and it is much more of a common problem when at operating temperature. It has good compression and I have checked all of the fuses. Fuel pump seems to prime just fine when I start it. When it does die, it takes a few cranks before it restarts like it isn't getting any fuel. If I hover my foot on the gas a little bit I can keep it from dying on me.

At this point I am thinking there may be some sort of bad ground in the block somewhere. When it is hot, I can grab a hold of the engine and shake it as hard as I can and feel it miss a little bit.

Any help would be greatly appreciated...Thanks!!

**MoarkatsINmuhtrailer** · 03-13-2013

Maybe the crank sensor.

**Scottydoggs** · 03-13-2013

clean the TB up real good.

i bet you need a coupler too for the sc, and thats what you feel when grabbing the engine. you can take the sc belt of turn the pulley back and fourth, like snap it, if it clicks, you can feel it, and some times hear it. you need a new coupler.

the main grounds are on your trans bell housing. right above the starter.

**addeible** · 03-13-2013

Thanks guys for the suggestions. I will pull the TB tonight, check the grounds, and report back. If nothing improves then I will replace the crank sensor. It seems like a bit of a fiasco if I am not mistaken so I will save that for last.