Help

[4-x]

I have a 2.5 pro 4 motor that stutters and stumbles all of the time. It does it at low and high RMPS and it does it much worse under a load. We have changed the fuel system carb-hoses-filters-cell, wiring, distributor, lifters, valve springs, intake, head, and I am sure more that i am forgetting. Does anyone have any idea what we could be missing?

Please let me Know what you thinks Thanks

[racerkrp1]

Stumbles

Have you changed the plugs? Had a motor that had the plugs fouled at one time and would never clear out. Put a new set of plugs in and ran great..

[4-x]

Yes we have we have tried diffrent heat plugs and gaps as well but thanks

[FLYNBRYAN]

Did you check you cam timing? Also Did you degree you cam?

[let-r-eat]

compression check and compression on each cylinder?

[ford396]

Ensure that you have a non-restrictive air filter system and that filter is not covering bowl vent. I have encounterd this problem on a 2.3 in the past. Chased my a** for awhile. Finally put it on the track without filter and concern was gone. Good luck.

[4-x]

alright guys I had to have the cam degree checked so it took me a few days but it was fine I also checked the air cleaner and compression and all of that was fine do u have any other ideas