Snasbury

1995 F150 5.0L V8

Hesitates when accelerating and idles rough. I thought it could be my throttle position censor, but I changed that and nothing. I have also change spark-plugs/ wires/ distributor cap and rotor, IAC. Cleaned out the throttle body and put on a new gasket and still the problem persists.

My question is could this be a vacuum problem? EGR valve, vacuum reservoir (coffee can)?

Thanks for any response.

ericantonio

Sounds like everything I've done in the past year to debug mine. Does it do this: At a steady acceleration, and you feel it bucking or hesitate, and you let off the gas, and then it stops and then gas it up again and it goes?

Snasbury

Once in a while that will be the case, but I usually have to step on the gas for it to go.

ericantonio

Yeah I was easing off on the gas. Then my GF drove the truck and she told me what happened and she said "oh, I stepped on it go make it go!" So either one worked.

I've changed IAC, IC, plugs (twice, realized I wasn't gapped correctly for a long time), wires, EGR, O2sensor, distributor cap, rotor, cleaned the throttle good inside/outside, cleaned MAF, changed all the vacuum lines.

And what finally worked......with the help of the forum, was changing the distributor. YMMV though. It's a 70-100 buck fix if you want to spend that much but I pretty much gave the car a full tuneup in the process so I feel good about that.

It was driving me nuts!! I would go uphill and it would hesitate all the time. And I don't drive it knowing I have to drive on hills but now I'm super confident I can do it (tested it out on the hilliest roads in my area).

Hausguy

If you haven't pulled any codes, do that. Plenty of smart people here to help you. I had an issue that a new PCM fixed.