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I have noticed my truck surging a little latly and was wondering if it could be the APPS. It feels like driving into a gusty wind. Would it give a code if it was acting up? I havn't check for any yet.

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I have noticed my truck surging a little latly and was wondering if it could be the APPS. It feels like driving into a gusty wind. Would it give a code if it was acting up? I havn't check for any yet.

Someone can correct me if i'm wrong when I say this, but I was told if you can use cruise control and it doesn't surge when doing it, it's not likely an apps issue. Mine randomnly does the same, seems to be more of a cold weather thing. You can try cleaning your IAT sensor, maybe that is getting gummed up :shrug:

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Someone can correct me if i'm wrong when I say this, but I was told if you can use cruise control and it doesn't surge when doing it, it's not likely an apps issue. Mine randomnly does the same, seems to be more of a cold weather thing. You can try cleaning your IAT sensor, maybe that is getting gummed up :shrug:

As for the cruise that only work for the later 2nd gens with electronic cruise contrl and not the mechanical vacuum motor. As for the IAT the only time that gets dirty is when you got a exhaust brake. Non-exhaust brake truck typically don't have a issue with either IAT or MAP sensor.

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I just replaced my APPS and it would jerk like the truck was missing every now and then. Sometimes it would hesitate and then take off when pressing the accelerator pedal also like was surging if you could describe it as that. Are you talking about running at constant speed and the the truck starts to surge without giving it any fuel?

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Sorry I haven't responded sooner I have been a little under the weather. Haven't checked the codes yet but my fuel pressure is around 18 to 19 psi and it happens during constant speeds without cruise. Thanks for all the input. I'll try to check for codes tomorrow

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Well there were not any codes so I guess that's good. Is there anything else I need to check before replacing the apps?

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How did you check for codes? Do you have a fuel pressure gauge?

I had Oriellys check for codes. I have 19-20psi at idle and 17-18 WOT

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I have noticed my truck surging a little latly and was wondering if it could be the APPS. It feels like driving into a gusty wind. Would it give a code if it was acting up? I havn't check for any yet.

I have been feeling something very much like driving into a gusty wind like you say. Just every once in a while. i can feel it but all of my gauges are holding steady. Mostly hilly country where I am driving so the movement in my boost gauge is the only thing i see. Not sure if that is due to grade changes. a subtle change will make the boost move up and down. When you say surging I am thinking the rpm rising on its own which you should be able to see in the tach. But if it is what I am feeling you have to be quick to the gauge to see it. I cant see it but every so often i feel it. My injectors are leaking at the head and I attributed it to that and until i stop the leak I am leaning towards that for what I am sensing. Is this any thingclose to what you are feeling?

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Yeah its not really missing it feels like i'm moving my foot up and down slightly. Sometimes it feels like it is slow to respond to pedal movement.

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on cruise it just feels like something breifly pushes on mine like a head wind. no skip just kind of a weird feeling.

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i get a cruise control "surge" when on setting 5, the pedal is so sensitive that the calibration of the cruise vacuum linkage gives to much throttle and the truck pulls hard, then it sees that and lets off too much then its just a rollercoaster after that. i can steady it with my foot but it is clearly my cruise control overworking the sensitive pedal. im gonna rectify that soon.

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i get a cruise control "surge" when on setting 5, the pedal is so sensitive that the calibration of the cruise vacuum linkage gives to much throttle and the truck pulls hard, then it sees that and lets off too much then its just a rollercoaster after that. i can steady it with my foot but it is clearly my cruise control overworking the sensitive pedal. im gonna rectify that soon.

I get that too but it has done that since I had the truck. I just leave it on the TOW setting and its fine. My camper isn't that heavy to need setting 5. Can you adjust it to be less sensitive?

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my 01 was doing this surge deal pretty bad at about 45-50mph when just trying to hold speed.i hadn't really thought about it til i saw this post but mike(moparman) told me how to reset my apps & haven't noticed it since.but i cannot use my cruse control at all with the mods i have.just a slight decrease is speed & it accels hard to ge tup to speed,just wastes fuel,more steady with my foot.:banghead:

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I replaced my APPS with one from Timbo and it fixed my problem. Great product :thumbup2:. Easy to install (about 20 minutes) and excellent instructions. Thanks to everyone for the input and advise.

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my 01 was doing this surge deal pretty bad at about 45-50mph when just trying to hold speed.i hadn't really thought about it til i saw this post but mike(moparman) told me how to reset my apps & haven't noticed it since.but i cannot use my cruse control at all with the mods i have.just a slight decrease is speed & it accels hard to ge tup to speed,just wastes fuel,more steady with my foot.:banghead:

i was going to remedy this by placing the cruise cable higher up the throttle linkage so its movement will be proportionate to the cruising demand

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I replaced my APPS with one from Timbo and it fixed my problem. Great product :thumbup2:. Easy to install (about 20 minutes) and excellent instructions. Thanks to everyone for the input and advise.

Good deal I'm going to be in the market for a timbo apps in the future also.... Just started noticing a spot in the pedal where my acceleration kind of drops off when I'm under easy acceleration Sent from mobile

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I replaced my APPS with one from Timbo and it fixed my problem. Great product :thumbup2:. Easy to install (about 20 minutes) and excellent instructions. Thanks to everyone for the input and advise.

Thanks Moostang, I've been having a surge that is getting a little worse over time (last 20000 miles highway miles) it has only happened with the camper on and the adrenaline on level 1 or 2 (no wire tap) but recently I have noticed it even without the Adrenaline being on. Happens from 45 to 55mph in Overdrive locked up only. Seems to happen on level ground, as soon as I push on it a little the surgeing stops. I have confirmed it's not the torque conveter or fuel psi. I have replaced map sensor, IAT, batterys, cleaned all grounds and checked all connections, so think I will try timbo apps. Thanks again Moostang.

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Thanks Mike I will give that a try, hope my 30$ multi meter will be as fast as your Fluke meter and be able to pick up the voltage fluctuations if it has any.

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I replaced my APPS with one from Timbo and it fixed my problem. Great product :thumbup2:. Easy to install (about 20 minutes) and excellent instructions. Thanks to everyone for the input and advise.

I give a second:thumbup2::thumbup2: to the APPS from Timbo, it fixed a problem that I had for a year and just put up with...:banghead:

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