For the last two day after I get off work at 6pm. I am leaving work and before I get out the driveway of work my apps reads 101%, truck goes to idle, I loose the throttle till I tap it twice and then it will come back. 

 

I get the P0121 code. 

 

Has anyone else experienced this?

 

Then only thing I know to do it run the apps test posted on this forum. 

 

 

The temp here here has been around 100 degrees. 

 

 

If there is one thing I have learned here is that no seems to have the same electrical gremlins as next one. I have had similar issues but not the same. My engine would surge but only to 7% to 10% then go to dead pedal, but would have to sit for a minute or so before the pedal would come back. I had the 121 and 222 code along with 236 and 237 map codes. Luck has temporarily fixed mine but pretty sure it will come back. Mine is most likely in the wiring.

 

Is your engine actually trying to surge to 101%  or just showing it on the quad? The diagnostics for the 121 is a good place to start. When mine started all of this the diagnostics for the apps codes pointed to the apps but turned out not to be the case. 

 

what kind of apps do you have, OE of aftermarket? Check your connections for corrosion, check you grounds for the same and cleanup anything that's nasty. Check your alternator for excess AC voltage, that can wack some things out kilter also. 

 

I hate electrical problems. I would rather change out my 6 speed by myself in the gravel drive way while getting a root canal than have them.

It just shows 101% on the quad. 

 

I agree I hate electrical problem. 

It may very well be the apps sensor. I would start with the diagnostics for the 121 code and see where it leads you. Mean while I am sure some one much better versed in electrical than I will come along. Sundays can be a little slow at times.

That is odd.  I would do a apps reset, I didn't know that it was possible for the ECM to report greater than 100 tps.

It didn't do it today when I left work. 

 

Tomorrow I will be able to do the apps diagnostics. 

Been so busy lately haven't got to test my apps. I haven't had a CEL again. 

i was ready to commit

Harry Karry 99 Gen 2 2500 6 speed dead peddle missing & cutting out. Low fuel pressure would drop from 11 pounds to 0 after running for a 1/2 hour. I replaced in tank lift pump. Now I have 18 lbs at idle still cutting out. Replaced injection pump. Primed up started right away. Idled great warmed up miss sputter fart dead peddle. Looked over everything. I replaced the apps / tps a week before this when it coded. Adjusted as discribed checked setting. Instructions stated set TPS to 10 -12 percent on an ODB scanner or .50v - .60v with multi meter. I set it at 11 it was stable after insulation drove 500 miles 13 miles from my house i didn't think it was  going to make it home. It was running so bad. I was ready to throw in the towel when I did some reading on installing a new APPS I had a meter this time. I read factory setting is 1.2 volts adjust up to 1.5 volts which turns out to be TPS 14% on my Code scanner. I nailed it back together yeah haw problem solved. Don't give up hope. You will find the answer if you get too pissed off and keep a level head.

Good Luck 

 

Try to keep in mind crazy and radical are fun. When it comes to performance it comes with a price. The first to that top of that hill or mountain is going to mean your going to be the first one in the shop at the end of the run. 

Morning,I'm having dead peddle issues in my rig and stuck up on a mountain. Put a new tps in and the followed the reset proceedure, no luck. How did you test for voltage? I have a meter with.

Edited August 10, 20177 yr by wldbil95
Misspelled

That's not good. Did you install a Timbo's APPS?

 

You need to check for the 5V signal voltage to the APPS. Then check for good signal ground.