I have a 99 Grand Am that just wont stay running. the shop replaced a number of parts then gave up saying the engine was bad. It sat for 2 years , I threw a battery in it it fires up for about 30 sec. running rouugh then stalls any ideas. i know the info is shaky but im only getting started on this

if its been sat for years the fuel filter has probably deteriorated, and its now in the fuel lines. there is a number of parts that need changing before you start an engine that has not been run in a long time. fuel drained, fuel filter changed, oil and filter changed. fuel goes off after a year or 2. oil can turn to sludge in the sump. and block the oil pump. this can also affect the oil pressure sensor.

what trans, 42 or 44 RE?
ask a wrecking yard (has Hollandar data base index)
or ask jeep.
the jeep ZJ
ask in transmission shop on earth> ,they know.
the fsm shows 93 to 98, not 99...
or use google , its free and fast and, there.
" 44re Jeep interchange"
1st hit,even shows the hollander number
5.2 LITER right?

http://www.smartpartsauto.com/automatic_transmission_44re.html

44 is 96-98

42 answer , amazing on a real jeep forum

http://www.jeepforum.com/forum/f13/transmission-went-out-my-95-zj-what-other-year-42re-will-swap-1319686/#post12927031

2000 has TCM shifted box.

why not read the full tag on the side of the box
for what it REALLY is.

it wont lie!

Clean out your egr valve.

I had the same problem. My car sat for a few days and when i went to start it i heard an extremely loud pop (kind of like a backfire). After that it would start and sound fine, but die 2 seconds later. Thank god my bf is a mechanic he knew instantly that the pcv valve hose that connects to the intake manifold unplugged itself. He plugged it back in and it runs fine now. I didnt however get a check engine light, but i only tried to start it twice before he fixed it because i was scared it jumped time.

depending on how old the vehicle is,it may be a bad modulator valve on the transmission,or just a clogged vacum line to the modulator valve on the transmission. please be specific with year,make and model,but i gave you diagnostic for 89 trhu 99 for most models anyway,research what year,make model of your vehicle.some want to blow smoke and say bad electrical module.do your research 1st beause transmission shops are gonna say replace the transmission to replace the issue. beware the trans shops that use 'god' for logo.some are great,others are ****. ask for a list of customers,and stand in line at those shops for disgruntled customers.do your research,angie's list.com is one way of finding out who does great work. wish you the best.

i would say you need new wires and plugs they should be replaced every two years and more likely the plugs are fowled out

check your fuel filters, fuel line, and fuel pump

YOUR CORRECT IT IS A COIL PROBLEM.... DO A REGULAR 6 MONTHS TO A YEAR TUNE UP AND YOUR CAR WOULD RUN PERFECT....

YOU NEED TO START WITH THE CHECK ENGINE LIGHT ADVANCE AUTO PARTS DOES IT FOR FREE MOST SHOPS ARE CAPABLE OF LOOKING UP THE CODE AND TELLING YOU WHAT IT IS

Thermostat should help but make sure fuel line isn't too close to heat source (engine or exhaust). This can perk your gas.