[j cAT]

Originally Posted by hunter4ever12

I have a 94 k2500 (true 3/4 ton not light duty) with a 350 and auto trans in it. It has little to no low end power at all I'm not sure it would even peel out in dirt, literally. It's also getting terrible fuel mileage about 8mpg. The idle on the truck once warmed up is a bit low as well. In gear it idles about 700 rpms. Once warmed up I do get a code 35 (IAC code) while idling. Previous owner replaced the IAC 3 months ago though. It also doesn't want to downshift when you get on the gas. I mean it will but you have to press the pedal to the floor for it to do so.

My initial thought was the kickdown cable was not adjusted right, but I looked and realized it doesn't have one cuz it's a 94 and that's the year they switched to an electronically controlled transmission, so the downshift is controlled by the tps. So far I have checked the base timing it's spot on at 0 deg before tdc. I haven't really dug much more into it yet. I know it could be several things like: tps, egr, fuel filter, intake leak, temp sensor ect ect.... Just wondering where you all would start first? I do have a parts truck with known good parts so "throwing parts at it" won't cost me a dime. But in all reality I would like to spend as little time as possible in diagnoses and repair.

Thanks in advance

low power and poor mileage could be restricted exhaust.