Having problems with your 2000 Pontiac Montana ?

2000 Pontiac Montana LWB, after a long drive and the engine is in normal operating temperature, if I turn the car off, intermittently the engine will crank, but will not fire or will fire for about 5 seconds and stall out and currently I need to wait about 10-15 mins for the engine to cool down and then starting is no problem. This problem is occurring more often now,maybe because of the summer temps. Not sure if this has anything to do with it, but when low on fuel in the tank, the fuel gauge w

Posted / edited by AnonymousUser on : 11-11-2019

Answers :

It could be a vapor lock issue. Vapor lock is typical in older vehicles. With the invention of fuel injection vapor lock has been minimized. What causes a vaporlock is underhood tempatures causing the fuel in the lines near the engine to evaporate causing a vaporlock. Now once the engine cools down, it will condense back into a liquid eliminating the problem. Fuel injection uses a lot more pressure than the old carburators did. One thing you can do is try replacing the three most important fuel system parts. The fuel filter, the fuel pump relay and the fuel pump. You need good steady pressure to push the vaporlock out of the lines. If one of these three parts is malfunctioning then it will allow the system to vaporlock. As for the gusage readings, taht could be just a bad sending unit.
Repair Help & Product Troubleshooting for 2000 Pontiac Montana

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