OK Guys and Gals, Here is a stumper for you.
I have a 1990 with the 3.0 V6 and manual tranny ( its my sons, but I do all the maint and everything on it) . Going down the road it stumbles and the RPM falls way off, this is a internintent problem, doesnt do it all the time. The motor has about 5,000 miles on a good rebuild ( 10 to 1 pistons, 80 tho of the heads, 54 mm throttle body,stock mopar replacement cam, opened up intake and exhast). All the sensors are in place and working properly? Just need some quik imput as to what might be going wrong. How dio I pul codes on this car without a scanner? Thanks for the help.
Troy

 

How to get codes: http://www.allpar.com/fix/codes.html

Is the problem weather related (happens when wet)?

 

Thanks. I will try and see if a code pops up. Used to do it on my old 89 Ram and couldnt for the life of me remember the sequence to bring them up. No it isn't weather related that I know of.
Troy

 

All Mopars have self checking PCM's, so you need not the use of a scanner.

 

two things to check are the fuel pressure and the coil /pickup coil.....

outside of that try the codes

 

I finally got around to pulling the codes. 12, 13, and 55 Sounds like 13 might be the problem, the MAP sensor. I still want to replace the fuel filter to see if it hepls, if not it is about time to replace it anyhow. All thoughts and coments welcome. Thanks
Troy