Have had several electrical problems with 99 gran prix gt. The latest is you will be driving down the road at 55 or 60 60 and the engine shuts off. you put the car in nuetral and it fires right back up. somestimes pulling out of parking lot same thing. i feel like this is a ground issue. i have not been able to relate this problem to hitting a bump in road. have had car in shop several times. fuel pump connector replaced, mass air flow sensor replaced as well as connector. replaced ignition module. crank sensor checks out ok.......i need help
engine dies driving down road
- Thread starter mbrann62
- Start date
Scottydoggs
Killa Bee
if your tach drops to zero right before the car stalls out, good chance its the crank sensor. they almost never set a code.
Scottydoggs
Killa Bee
that sounds like a crank sensor. dont believe the shops all the time. like i said they rarely throw a code either.
and how the hell you you tap on it while its running? its behind the balancer. shops stink. you would loose a finger for sure.
hers a how to if you plan on doing this yourself.
http://www.grandprixforums.net/crankshaft-position-sensor-replacement-2-698.html
and how the hell you you tap on it while its running? its behind the balancer. shops stink. you would loose a finger for sure.
hers a how to if you plan on doing this yourself.
http://www.grandprixforums.net/crankshaft-position-sensor-replacement-2-698.html
Scottydoggs
Killa Bee
these 3800 are in a class by themselves, if you dont know them inside and out, you will miss something like this. not saying at all they are bad guys, they just done have the experience to figure this one out.
with these newer cars, the cel light is the answer to your problems, if it dont light up, they have no where to go with it.
till you find a place like this where its all shared freely.
do a search on the crank sensor, or car just dies or something like that, you will see this problem over and over.
with these newer cars, the cel light is the answer to your problems, if it dont light up, they have no where to go with it.
till you find a place like this where its all shared freely.
do a search on the crank sensor, or car just dies or something like that, you will see this problem over and over.
BillBoost37
New member
Shops don't stink usually. They work with what they have available at the time. I'd replace the crank sensor personally.
My own Bonneville would "hiccup" going down the highway...maybe only once a day. I checked/tried everything. Til one day when I was scanning, then I saw it. The runtime counter reset during the hiccup. A crank sensor was all it took to right things.
My own Bonneville would "hiccup" going down the highway...maybe only once a day. I checked/tried everything. Til one day when I was scanning, then I saw it. The runtime counter reset during the hiccup. A crank sensor was all it took to right things.
well i went to a couple other forums and a grounding issue was brought up several times so yesterday evening i took my multimeter and check the ground from battery to engine and showed very little drop in voltage. so i believe i will do the crank sensor next. thanks for the info gentlemen.
BillBoost37
New member
Which forums? Likely I am a member.
Grounding on a 3800 would typically have been on the ICM before 96 when GM added another ground wire to the ICM instead of it getting ground through it's bracket.
On your GP, the negative battery cable travels from the battery to the lowet stud on the front of the transmission.
Grounding on a 3800 would typically have been on the ICM before 96 when GM added another ground wire to the ICM instead of it getting ground through it's bracket.
On your GP, the negative battery cable travels from the battery to the lowet stud on the front of the transmission.