My buddy has a 89 pontiac sunfire. It sat for a while and he just started driving it, let the gas run out and put new in and then it stopped running. Today we sprayed starter fluid into the throttle and it started up. Let it ran for a bit, turned it off for a second and then cranked it up again. So I went ahead and replaced the fuel filter and poured some sea foam into the tank. I then primed the liine and then it cranked right up for about 5 seconds and died. Now its not starting. Fuel is going into the throttle and I can hear the fuel pump activating. Any ideas? Belts are all fine and plugs and wires are brand new

find and fix the vacuum leak

Check engine light on , have the vehicle check for DTC's - diagnostic trouble code's . Probably point to a fix .

i would try putting some fresh gas in it gas goes bad in a short time use stabile with fresh gas if a car is going to sit 4 awhile

your fuel pump could be getting hot and loosing pressure the way to find out if this is wrong is take it to a garage and have them to take a pressure test of the fuel pump, this might be your problem, you could have also got some bad gas, take and run you a bottle of stp gas treatment to see if it helps one of these most definitely your problem.hope this helps

shouldn't have to....just put gas in it...and please don't run no additives in your engine/tank...your engine is not designed to burn the additives that are available on the after market...

You probably have air in the system. You need to bleed the air out of the system so that it will disengage your clutch. The air in the system is compressing and, therefore, the slave cylinder can't reach the full extension.

sounds like gas filder is stoping up

check if this car has load proportioning valves fitted for the rear brakes and working correctly if it is a rear brake slide.if not check A B S sensors and the A B S control unit.if the A B S light comes on when moving it is a sensor problem.if its on with engine on with car stationeryits almost likely to be A B S unit

egr valve is open, have it checked.it might be the egr valve itself or the siolinoid

as far as the bogging and dieing,it sounds like the tps.a simple trottle body service would fix that.for your new problem you need to some test before pointing to a salution.start the car and cover your tail pipe.as pressure builds it push you hand off.a clogged cat will put to much back pressure on the engine.i would un plug the mass air flow sensor and try running the car.this will turn on the check engine light.check your air filtter and plugs.also check your wires.a nother test is a coil strees test.(you have to go to a shop for this)if the car runs ok with no load but spitts and sputters in drive you may have a openning coil.checking with a meter only works if it does not run.last but not least while you at the shop,have them check your timing.a faulty cam sencer will bog the car down with bad timing advancement but not throw a code.
hope this helps,remember to keep it simple,expensive elec. parts are not always the problem