Changed the fuel pump and fliter on 90 Chey Lumina and removed catyltic converter. After I did this it cranked and ran for one day, started running rough and now won't run but will crank over and won't stay running. Need some answer never work on one before. Please someone help me?:banghead:

Changed the fuel pump and fliter on 90 Chey Lumina and removed catyltic converter. After I did this it cranked and ran for one day, started running rough and now won't run but will crank over and won't stay running. Need some answer never work on one before. Please someone help me?:banghead:

Welcome on your first post.
Not trying to be a hard nose but.:lol: :grinyes:
Before we can give you any answer we need some info.
What is the fuel pressure?
Is it Losing spark or fuel pressure or injector pulse?
Any codes or security lights on?
After market theft or remote start stuff?
Tune up history?

Tips on getting a good answer to your questions.
People trying to answer your question do not have a crystal ball.
So give them all of the info you have like year make and model and engine and transmission and mileage.
Also cars engine and transmission service history or any recent repairs or problems.
Also a description of your problem and what it is doing or not doing.
If you have codes give up the code no.
And remember a code does not say replace the part but only points to the problem that you have to check out.
So to better help you give up all of the info you have on it.
MT

Was the old cat damaged? I've seen them fall apart inside and shotgun the muffler with debris to the point no exhaust could get through, and the motor will only run until it backs up so much the intake can't overcome...

the car is a 90 chevy lumina euro 3.1 motor auto tranny 202000 miles 2nd owner garage serviced before i got it as far as fuel pressure i dont have the tools to check this, no theft sys or remote start check engine light stays on . car started fine after fuel pump and filter were changed then slowly started to run rough then didnt idle good drove maybe 40 miles and cat was glowing brite red and car would not run put car on my tow dolly and towed home we removed the cat and tried to start with same result checked plugs they were dirty with slight white discoloration and smelled like fuel ,cleaned them and tried tried to start again same result i dont have alot of knowledge when it comes to chevys none over 79 to 80 so i am flying blind here any info will be helpful thanks

What were the symptoms that lead you to change fuel pump ? I'm borne to think the symptoms you have now were already there before....
THe plugs smelling fuel make me think you have no spark. No crystal ball here but crank pickup and ignition module are classic failures on that engine ...in fact, as in a lot with that mileage...

If you are still dealing with a start that fades out and stalls after a few seconds, I'm still sticking with the clogged exhaust idea (happens when a cat melts down, or it might have even been overheating the cat BECAUSE of blockage farther down...

See if there's anything coming out the tailpipe when it tries to run. If not, drop the pipe at the cat and see if it will run then...

the car is a 90 chevy lumina euro 3.1 motor auto tranny 202000 miles 2nd owner garage serviced before i got it as far as fuel pressure i dont have the tools to check this, no theft sys or remote start check engine light stays on . car started fine after fuel pump and filter were changed then slowly started to run rough then didnt idle good drove maybe 40 miles and cat was glowing brite red and car would not run put car on my tow dolly and towed home we removed the cat and tried to start with same result checked plugs they were dirty with slight white discoloration and smelled like fuel ,cleaned them and tried tried to start again same result i dont have alot of knowledge when it comes to chevys none over 79 to 80 so i am flying blind here any info will be helpful thanks

As said there is several things it could be.
It needs Proper testing to get to the bottom of it.
If plugs are gas fowled pitch them and get new ones.
First thing check for good hot blue spark to all spark plugs.
Jumper A-B pins on diagnostic connector and pull codes.
Post back if any.