southerman

how do tell when your apps is going bad? at 50, 60, and 70 my truck will hiccup or hesitate for a half second doesnt do it all the time no codes fuel pressure good any ideas? im lost.

southerman

Anybody?

rickf

If it is at the same speed every time I would vote for the APPS. They tend to wear at the spot where they sit the most. Mine was stumbling at start from a standstill, gave all the indications of a injection pump going out but after I put in a Timbo APPS it has not stumbled since.

Rick

wmcclay

back probe apps sensor at connection or check voltage with computer as you operate throttle. should be smooth as throttle is pushed slowly. voltage jumping around is a bad sensor

whiskers

Can also be noise spikes causing the TC to unlock briefly. very common. Check all grounds and alternator wiring.

southerman

Thanks guys will check this weekend didnt do it this afternoon on the way home. Seems to be worse in the morning when it's cool but has done as well when warmer.

SIXSLUG

Usually stumble at lower rpms.

Shouldn't do it with cruise control set.

If it is in fact a bad APPS, just get the Timbo, follow the directions and be done with it. Trust me.

Tree DR

You might try resetting the APPS first. And you could also recalibrate it.

DodgenIt

All good answers.
I agree with the Timbo sensor for sure. Last winter My truck was bouncing around in throttle and I just straight went for the apps. Hot one from Timbo and cured the problem. Much better price then box shop or dealership too.

southerman

did the apps reset working fine now if its acts up again timbo will get some of money. thanks everybody

Tree DR

I recalibrated my apps also. Got timbos apps in hand but haven't had anymore problems since recalibrating and reseting APPS.