Backround, full out of truck overhaul around 14 k ago.ran good from what another runner owner told me. Auto trans is working fine. Put cams in didn change much, more top endpower.

Last yr mpg started falling off from 13 to 9 and smog shop said truck surged on their load cell. Timing moves about 3 degrees above or below target even jumpered.just lived with it after a basic look. Now its getting more noticable driving,so i checked the igniter,coil,and distributer. All were middle of spec. My gut says distributer buti cant justify throwing parts at it. Anything im missing?

Thanks for your time

 

Have you checked the tps? My guess would be either the tps or the signal generator in the distributor, but I am sure that more knowledgeable gurus will chime in soon and give you a better answer haha

 

I checked it a few months ago. Cant hurt to have another look,ill take a stab after dinner

 

my truck did that, it was the distributor

 

Did you check for a possible stored code?

 

Tps checks fine. No codes stored. Ive seen a few but the dist tested out of range on the ones ive seen. May just have to bite it and buy one. Got a friend in the next town with a v6 might have go get him a case and dinner and swap it over for a tes tsome time