rough idle after tuneup on 1994 Dodge Ram 2500

Van just stopped running. No warning. Replaced coil and coil sensor. It started up. Running rough so did the cap and rotor. Still rough. Replaced plugs.Still rough.rougher than previous. tried egr valve. not the problem.

by in Denver, CO on June 02, 2011
2 answers 6 comments
ANSWER by on June 02, 2011
Any check engine light?
COMMENT by on June 02, 2011
no engine light
COMMENT by on June 02, 2011
The fuel filter and fuel pressure regulator are combined and in the fuel tank.
ANSWER by on June 02, 2011
Double check the firing order on the distributor cap, maybe a plug wire is out of order. If you think its running worse than before the distributor cap was replaced. The distributor spins clockwise and the order is 1-8-4-3-6-5-7-2. Cylinders #1-3-5-7 are on the drivers side and #2-4-6-8 on passenger side.
COMMENT by on June 02, 2011
been there done that. Fuel injectors? Or where is the fuel filter?
COMMENT by on June 02, 2011
Possible injector, fuel filter is inside the fuel tank mounted to the fuel sender. Give us a call, we can take a look at it and diagnose it.
COMMENT by on June 02, 2011
Just checked the plugs again for gap and defects all were fine. Seems to be getting worse now not better.
COMMENT by on June 02, 2011
It's hard to tell without looking at the vehicle. I would have someone perform a fuel injector drop/ballance test to see if the injectors are working properly. Maybe a fuel pressure or delivery issue. The injector test requires special tools to perform properly.