Question about 2000 Pontiac Grand Am GT
99 Pontiac Grand Prix. When car slows down or turns it stalls. Nothing is coming up as failed when tested not sure what else to do.
I can tell you exactly what it is 99 Grand Prix 3.8 liter stalling when turning are coming to a stop it is going to be the connector for the throttle positioning sensor it has a crack in one of the wires under the insulation find it by letting your car idle move the wire up and down lightly with your hand and you will see the RPM's change in your motoror the motor wanting to stall
Posted on Oct 31, 2014
There are SO many things that could be to blame, such as a relay sticking in the Engine Management System, which controls fuel cut-off on deceleration, for example.
Have you changed the fuel filter yet?
If it's the original on a 99 model and a previous owner has run the tank dry, it will have sucked dirt into the filter.
Otherwise, the fuel pump may not be working efficiently.
Does the engine sound ok and maintain steady revs, around 850/900rpm when it's started up?
Posted on Nov 17, 2009
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Posted on Jan 02, 2017
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