20 Most Recent 1999 Pontiac Grand Prix - Page 7 Questions & Answers

Check harness / wiring for continuity , damage , chaffing, connector contact, etc... from speed sensor to ECM.

CHECK DRIVER DOOR SWITCH

Sounds like the vehicle has a ballast ignition, which supplies a full voltage to the ignition when the engine is cranking and drops through a resistor when the engine starts. Sorry can't give the location of the resistor?

Those are commonly known for leaking from the intake manifold gaskets, which will require you to remove complete intake off and replace.

check fluid and filter on transmission change both at rapid lube or a transmission shop..

i use a scanner to check to see all wheel sensors.getting a signal . it take two people. your scanner have to be type to check abs system. you can use ohms meter . it will tell you your wheel sensor is open or shorted out.

replace the injector and check wiring for poo contacts and dirty pins.

try running a couple cans of fuel injector cleaner through the tank-Denny

If there is a bleeder valve it will be at the highest point in the system

You need to cut out up to 2" from the end of the rust and weld all new metal in. Best way to do this is to get a used section of the area you need from a salvage yard. Cut and fit the used part to replace the damaged part. Its the fastest and simplest way.

see pinout :http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c15280217ebd

if its the same set up as my oldsmobile intrigue there is a plug behind the glove box that has a sensor board, my fan quit working all together and I swapped that sensor out and everything worked fine afterwards, does your right side passenger floor board get wet when it rains hard, if so it has shorted part of the sensor out for the high side of the fan.

U NEED TO TEST YO FUEL PRESSURE REMOVE YO RETURN PIPE AND CHECK

Are you sure there are no blown fuses? There are several that feed power to the radio. Are you sure the dimmer switch didn't accidentally get turned down? I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

one side is with a nut