What is causing the car to run ruff?

Have the charging system checked for proper operation. If battery is not being charged properly and goes weak the electronic control modules within the vehicle will start shutting down and cause all sorts of drivability issues

i had a 1984, that did the same thing. it turned out to be a bad vaccuum connection on the intake. have you checked all these lines?

Check your fuel filter again. Dirt from the tank could have clogged it again.

Ck your alternator output, should be between 13.8 and 14.2 volts, A bad alt will cause the battery to discharge when driving, Once voltage drops to a certain level (9.8 I think ) the ecm starts to shut down causing all kinds of strange problems, like running bad ,trans not shifting right, even the radio ! It happened to me in my 95 chev p/u

When was last tune up? Plugs, wires, all fluids & filters? Especially fuel filter? I'd start there and run a good fuel system cleaner (Stp. Gumout, etc..) through it and avoid cut-rate fuel

Sounds like you have a bad bcm as far as the lights ! The running rough and the cel flashing indicates a misfire condition ! Check your plug wires and see if a critter hasnt chewed a wire !

when it hit 60/70 miles it spit sputters somtimes i change plugs , wires, cap still does the same
can you tell me what i need to look for.


thanks G man

how does it run off idle. does the exhaust look or smell strange.mor info please

When it's running poorly, how do the brakes feel? Is the pedal very hard? I know this sounds like a strange question, but I had a similar (but not exact same) problem which after completely testing everything three times and even swapping a pcm from a known good vehicle, I managed to fix,without replacing any parts but am not sure exactly what was wrong.(I believe I "outsmarted" the computer, but am still not sure what the underlying problem was)
What I do suggest is that you individually test each sensor to see if anything is out of range. I'd especially look at the map sensor and throttle position sensor, possibly the cam sensor and sensor shaft.Stop buying parts and do the testing. Only then, after actually verifying a failure, should you replace any more parts!

I have the same problem on my 95 grand cherokee laredo. Sometimes it starts out fine and after about 10 miles it starts spitting and sputtering. Then after a while it seems to clean out and run fine again for a little while. Then other times it starts out spitting and sputtering at the begining. I changed the fuel filter and that was not it. It is a 4.0L 6cyc. Any Ideas?

Thanks,
Broken Arrow, OK