Please Help, Car Runs Rough And Did Not Start This Morning

[Musada]

The car has been running very rough the last few days, and this morning I tried to leave work the car wouldnt start. The car was turning but not firing up. I had my coworker come out and check it. He said the car isn't getting spark Then after about 30 mins i tried again, and the car turned and I'm assuming it finally got spark and fired right up, but still runs rough while I'm llightly pressing the gas, it sputters a lot

[UCF3]

it could be a number of thinks, not limited to bad starter, bad fuel, bad tune, etc. what have you eliminated?

[Musada]

Sorry for not mentioning..it's a 90 ls400.

Car has a brand new starter, fuel filter,fuel pump, crankshaft sensor, both cats aren't even year old...only use premium, recently used seafoam to clean out gas , tune up was done at a reputable shop

[LexusFL]

Verify your ignition coils are good. I replace my ignition coils to resolve similar issues. Car would also sometimes also cutoff when braking.

[landar]

If it is spark related, it could be a number of things. An intermittent coil (or coils, you have two) or worn rotors or distributor caps could produce the symptoms. In the winter months, especially when it is damp in the morning(depending upon where you live, if car sits out overnight), it is not unusual for the spark plug wires to crossfire if the insulation is old. If you have not done a basic ignition tune-up in a while (last 50k miles or 5 years), you might consider new rotors, caps, wires.

[UCF3]

are you loosing electricity when you're braking? Also, the shop that did the work have you asked them what's going on yet?