olegreen

No I do not have any wiring diagrams for the truck. Plus, back to the cal codes I didnt think you had to recalibrate a new eup. Its going to be hard to get this to duplicate since it only does it in high gear and high rpms. Ive got another eup coming and going to try to change them out one at a time to see if there is any changes.

Dont guess I know anything about installing any cal codes. Also cylinder one had a bad spot on the wire from rubbing on the block, but all other wires seemed to be good. Also with the key on checked with a volt meter.

98 Ch 613 maxi cruise. The engine is a 2000 rated at 350 horse power, if that matters.

The miss didnt happen until I replaced the last 4 eup's. I had 2 I installed, then the dealer had to order the last 4. Truck ran really good until I installed the last 4 eup's. Bad thing is it runs really good in every gear besides 10th, thats the only gear I can make it miss. It will pull all the way to 2000 rpms in all other gears.

First I would like thank everyone with help in the past. Ive been reading these forums for years with a lot of helpful information. Ive got a high rpm miss that I cant figure out and was wondering if anyone could help me out. First, I just replaced the cam, injectors, eup's and thats when I started to get the miss. Ive also changed both cam and crank sensors, fuel filters a few times and the ground bolt on the block has been cleaned. There is no lights on and it works because I had a 8-3 code when I changed the unit pumps. The miss only happens around 1700-1800 rpms, good below and above that range. Also the fuel pump has been changed to. Any help will be greatly appreciated. I really think Ive got a bad rebuilt bosch unit pump but at this point not sure.