1999 Pontiac Grand Am. I bought the car as is with blown head gaskets, and fuel pump. The
engine would not run when purchased so I dont know all the details about the car. I see the
previous owner may have been chasing this issue because it does have a new crank sensor.

I have checked the ground connections but have not run into anything yet. Any ideas?

I bought the car as is with blown head gasket, I replaced both gaskets. When first start up wouldn't
start had very little fuel pressure. Replace the fuel pump. The cars runs good its just when you
start it. Why does my car spit and sputter the tach and interior lights flash rapidly like the ignition
is being turned on and off. This happens intermittently. Sometimes it starts right up, other times it
may take 3 to 5 times before it continues to run. Once running the cars works great.

What you are describing does sound electrical. With all the work done prior, i would make sure
you dont have a loose connection, or rubbing harness somewhere. You could pull on the
harnesses when it is running to see if you can get it to act up. Make sure the fuel pressure
regulator is not leaking. This would give the rough running for a few seconds, but not the
electrical problems. Wiggle on the ignition cylinder and tilt the wheel up and down to see if a
possible problem in the ignition switch or harness.

99 Grand Am Pontiac 3.4L V6.
Replaced fuel filter,
spark plugs, clean throttle body, PCV valve, wires, coils and module, FPR looks
Question:The engine stall when car is warm or shot run,after 5 min. Try to start stall,but when i put
foot on gas have to hold for 15 to 20 seconds coming back and runs good,over all runs very good.

Sounds like a typical faulty Idle Air Control Motor (IAC). This part does what it says- controls the idle.
Even though it may be able to control idle partially, it cannot keep the low idle on a hot engine. And a
hot engine wants to idle low.
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Pontiac Grand Am Head Gasket And Blower Problems

Problem with my 2002 Pontiac Grand Am 2.2L 4 cylinder 2200 Vortec.
Just bought the car from my sister. Says the following has happened for years. The blower motor
comes on while the engine is off every hour or so. Runs for about 10 seconds. Never causes a low
battery situation. Doesn't seem to be normal, but I guess it could be to prevent a/c odor smell from
mildew. Didn't see anything about it being a feature of the car in the owner's manual. Is it normal?

Yep, you got it exactly. It is to help dry the evaporator coil and case to prevent mold and mildew. It is
called Afterblow. Not all models have this feature. Normally on models being built to ship to warmer
states. GM even has a kit that can be installed on vehicles that were built without this feature.