Pontiac Problems? Ask a Mechanic for Answers ASAP
Hi, I'm Greg (Indy-Tech).Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.Rgds Greg.
This is a very common issue that you have ,see this just about every other month in my shop and in 95% of the time its just a bad crankshaft sensor .
This is located just behind the crankshaft pulley ,so this will have to be removed to gain access to replace.
Quick test what you can do if you have a engine rev counter is when you have a no start period try and start and if the rev counter does nor show 250 +/-50 rpm the crank sensor is bad .
If you don't have a rev counter you will need a scan tool with live data and go to engine speed.
This is not a one answer and done i/we will stay with you until the problem is sorted out .Before rating poor or bad please get back to me as i'm here to help you, if i can't i will opt out so another expert can.We want you to be happy with an answer and help you with your problem . Want you to be a happy motorist .After rating there is no further cost for any other question relating to this problem Kind regards Greg..
Sure no problem rate when ready .
But just drying off the sensor and using dielectric will not help .
The problem is the sensor has malfunction internally when it get hot is fail ,when cools off it reconnect.
You will have to replace it ,but do the test as said above .
See if you can do the test first when she fails to start as other issue that can cause this same problem is the fuel pump
only when hot it will start and stall in most cases,
Then the coil when no start and you have RPM reading check for spark at the plugs .
PS. Do the check for engine speed first as when the cranksensor fail you will also have no spark .
so if you have a rpm ready check spark if no spark replace the coil