My car has occasional problems where i'll pull to a stop and sometimes it will die. It has also happened on the highway- and sometime when i got to take off, there's like a lag, then it takes off. And (damn) sometimes when driving down the highway it will like sputter and then go back to normal.

I dont know why--i've been thinking its symptoms of a fuel pump malfunction. I have not replaced any of the two O2 Censors...would they cause this? Is there a way to check them, and would they trip the check engine light (fuel pump or 02 censor) Anyone have any ideas?

I just put on MSD Coil Pack + MSD Plug wires. I've replaced the fuel filter and its done no good to fix the prob (eventhough it needed changed) But im sort of at a loss here. I dont have any check engine lights or anything. Any help would be much appreciated, thanks guys--

I know this sounds stupid dude, but check your coolant temp sensor. Seriously. I was having the same problems and I replaced my sensors, my coil pack, injectors, plugs, wires, fuel filter, o2 sensor, bla bla bla. It was a bad coolant temp sensor to blame. Take my advice, learn from my fuck up, go get your codes checked.

My first guess would be that you need a new fuel filter, but you say you just put one in. Your O2 sensors have nothing to do with it. If one of them went bad, the car would still run just fine, you would just be throwing an code on the check engine light. Besides, most of your O2 sensors are on your exhaust, which has nothing to do with why your car is sputtering - it's probably fuel/timing related.

I would double check everything with your MSD ignition install first. Was it doing this before that install? Have you replaced your air filter recently? When is the last time you changed your spark plugs? Do you have any fuel mods? If your car is older and you have never changed injectors, it may be time for new ones. Check these things first, fuel pumps rarely "go slow". They just go, stop working one day and that's it.

Hope this helps, or at least gives you some other options. Good luck figuring it out.

EDIT: Nevermind, on the MSD ignition, I see you installed a coil pack, not an ignition.

1999 Eclipse GST 4G63

This happened to be on the way back from a body shop... SOMEWHERE theres a drain on the battery, so if it sits for more than like...I guess the 9 days it was there... it will cut out when I come to a stop... I had to start it up like 5 times just to make it home a few miles away...

Had the car been sitting/what condition is the battery in?

FS: 2.5" Test Pipe 25 shipped

.

Yeah, mine was like that for awhile but I just ignored it, then it just went fubar one day. My coolant temp sensor was reading -29 on a warm engine. Go to autozone and pay them to scan your car.