Hello, and thanks ahead of time for taking the time to read this post. I'm new to the site, obviously, and the reason that I'm here is because I need help with a car that I seemed to inherit. I'm the new owner of a 91' Cutlass Supreme with a 3.1 and just over 80k miles on it. It's been garaged mainly, but this was my grandmother's old car and I've heard that she tended to have a lead foot when she drove it.
On to the good stuff....this car is now stuck in my culdesac and does not start. It will turn over just fine and stumbles sometimes as if it's trying to start. If I open the throttle up while turning it over it backfires out of the intake. The problem started when my friend (who was using the car at the time) started hearing backfires out of the intake (or some sort of thumping sound from under the hood) and it died at a stop light. We were able to start it a couple of times, however it ran VERY poorly and when ANY sort of throttle was added it would die. The only thing I have tried so far is replacing the MAP sensor, however it would do the same thing. I jumped the pins on the obd port to display a code, however the only thing that happens is the check engine light keeps blinking repeatedly at a constant rate.
Any help is much appreciated....I won't bring this to a mechanic however I am currently enrolled in ASE mechanic's school and have a lot of experience with working on cars and trucks.