ssmith3003

I have a Ls400 1993 and replace the cats and mamifold and plugs.. the car sat 4 about a year and it run rough putting it mildly. The check egine like is on and blink at times but will not stay started. I did put in some gas treatment and it ran good for awhile but i'm back to squar one. Please HELP (No A/C when the check egine light is on)

deanshark

The first thing you need to do is check to see what codes you have with the engine light. If you don't know how, this will help; http://www.lexls.com/tutorials/intro/codereading.html
Also need a bit more info. Did the car sit for a while after you did the work mentioned or did you just do the work now and it started to run like crap? Ya need to figure out if it's fuel/air or spark related. Check for spark at all 8 plugs, ya might find you have a bad plug wire or coil. It could be something as simple as a clogged fuel filter, or it could be something alot worse. Gotta check for the codes first and go from there.

ssmith3003

Thanks for the responce.. The car sat for about 10/m then replaced the manifold and cats and it ran ok then 2days later it was loke crap so I changed the pulgs and gas filter and now it will not start and when I turn the key on the dash light dose not come on. After trying for awhile the dash will light up. Now when it do get started it's like 1/2 of the car is on. Thanks again for the link I know it's going to come in handy and I'm going to get the codes....