Pontiac Problems? Ask a Mechanic for Answers ASAP
when it does not start you need to check the basics.. will have to pinpoint what the engine is missing.
All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the car to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should! Compression tester, spark tester, fuel pressure gage and noid light are all accessible
early on these did have a batch of bad computers...I changed so many of them I use to have the part number memorized...they had week sodder joints..but ignition modules were very common also
they use to intermittently stall , and gm had the techs o a simple tap test...tap on the pcm if the car stalled replace it...but you have a no start... very limited data can be pulled out of these is you have a old mt 2500 or a old tech scan tool..
here is the old tsb..
Some control module's may have problems due to cracked solder joints on the circuit board. These internal control module problems can cause the following symptoms:
Incorrect PROM or MEMCAL removal and replacement can create solder joint problems or aggravate an existing condition. See PROM or MEMCAL INSTALLATION for proper procedures.If a solder joint problem results in a "hard" failure, normal test procedures will usually pinpoint a faulty control module. Many symptoms caused by poor solder joints in the control module result in intermittent problems, but they may be hard to duplicate during troubleshooting. Control module's with solder joint problems are sensitive to heat and vibration. You can check for these internal control module problems in either, or both, of the following ways:
If the engine stumbles or stalls, the "CHECK ENGINE" "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR" light flashes, or any of the previous symptoms occur, the control module may have bad solder joints on the circuit board.
lol hope you can rate me excellent
hope you can rate my service 5 start or excellent
hope you can rate my service 5 start or excellent...that's the only way I get credit for my advice, time and knowledge