Stevolwevol

iTrader: (1)

I replace the TPS, IAC, coolant temp sensor. It started with a mild stumble at under 2000 RPM's, and now it runs rough at start up, weak throttle response, and running rougher. I will not drive it till I find an answer, cause I'm afraid it will quit running all together. Any suggestions?

Schurkey

Plug in a scan tool, read the data stream. You'll likely have your answer in fifteen minutes.

Until you locate a scan tool, you can do a cranking compression test, a cylinder-balance test, and perhaps a cylinder leakdown test.

Stevolwevol

iTrader: (1)

I replaced the sensors I listed in my previous post, along with cap, rotor, and plugs. I could not pull codes. The tune up helped over all, but I still get a intermittent stumble between 1 and 2 thousand rpms. I'm at a loss.

Schurkey

I didn't suggest looking for "codes".

I said "read the data stream".

Oh, yeah. How about the other tests?

W.E.G.

Vacuum leaks?

antares57

iTrader: (8)

If the timing is correct, rupture in FPR diaphragm?

brianlibby791

Sounds like injectors seizing up. Did you pull the air cleaner off while it was running and take a look at them? Try looking up the ohms that they should be properly running at and test them to see what they come back as.