20 Most Recent 2003 Pontiac Montana - Page 5 Questions & Answers

Take it to a garage and have them read the OBD faultcodes for starters ... could be as simple as bad electronics/wires, but something more serious too ...

Sounds like vapor lock. This is when the fuel turns into a vapor before reaching the engine (it needs to be in a liquid form). This is usually due to high temperature from the engine and environment. I would have someone check it out.

Have you are dealership check with a scan tool to see if you have a cam sensor, or crank sensor problem. Without these 2 you have no communication with the ECM

drive shafts are normally flange mounted and have 4 bolts that bolt the flanges together. Undo the bolts and slide the shaft along the spline to get it off the flange ( may need a lever to break the hold of the flange)

Have the OBD codes read as there are a few things it could be , the codes will tell you which sensor/switch is at fault, will save you time and money searching blind , i'd think it is either the crank sensor or the coil pack but the codes will tell you definately

Sounds like a crank sensor.

There is a control unit inside the door that handles the windows and the locks. This may need to be replaced. It's not incredibly difficult to do once you get the door panel off.

IF IT RUNS OK DONT DO ANY THING

extended crank time when cold, poor fuel economy, spark knock, lack of engine power,erratic or high or low idle,cooling fans run all the time.cooling fan fails to turn on, engine over heating. God bless!

ICM Idle control module it's problemly sticking or going bad

replace your drivers side master switch

You must replace it.