Engine/Transmission (1998.5 - 2002) APPS failure - how long till it dies?

[RKlaassen]

Had a dead pedal while driving at about 60mph, took it out of gear and was looking for a place to pull off, after it droped to idle everything returned to normal. Check engine light and codes 1693 and 0121. Starts easy and runs smooth through the full rpm range. CEL is now off. NO smoke of any kind. I was wondering if about those of you out there that have had APPS failure, what the time table was after the first symtoms until replacement was necessary? Did it fail all at once, or just get so annoying that you finally replaced it? I don't want to get stuck on the side of the road, but I also don't want to put out the bucks until I know that this is the problem for sure.

Thanks

 

[BBliss]

Ive been dealing with this problem for 6 months, it is worse with hot weather, I now deal with it at least once a day. The problem is worse after work when it is hotter than hell (100+) The worst problem happened a couple of days ago when the pedal went dead for good. Had to turn off the engine and poured water on the apps to cool it down, then started back up and everything was fine. Finally got a new apps today and will install tonight. codes 121 and 122 are the sign that it is failing.

 

[PRout]

I drove with mine exactly like that for about 6 months before it gradually got worse enough to go get a replacement. . At least it doesnt leave you stranded or kill the power steering/brakes. It is still a dangerous thing though. Recommend replacing it asap.

 

[Oil Burner]

When they start to go, it can cut out on you at any time. Mine died on me several times and left me in some VERY uncomfortable spots on the highway. I feared for my safety on more than one occasion when I lost power and was idling along an 8' shoulder on a blind turn with big trucks screaming by at 70+mph. I ordered a new one that day.



Your symptoms are right in line with the APPS.



Jason

 

[RKlaassen]

Thanks for the info everybody. My driving route is more of a concern than the traffic along the way. No cell phone service and halfway to work is 10 miles from nowhere. I was more worried about the hike home during a thunderstorm than than getting run over by a truck. I'll get one ordered next week.

 

[RRFinch]

I am getting the "dead throttle" response as described here.

Hot weather is when it happens.

But I am getting code 216 - injector timing control circuit malfunction.

That, I think, is inside the VP44... . YUK.

Any thoughts? Am I right?

 

[rweis]

VP44's that are close to failure will exhibit "danger" signs when stressed by heat.



I have a long thread on keeping the VP44 cool https://www.turbodieselregister.com/forums/showthread.php?t=135952 and will post observations ideas after this summer (high daily heat 100+) is over (so far VP body temp of OAT+5* is still working well).



Seems to be more 2nd gen and then more 02's (maybe something to do with engine compartment air flow different than other 2nd gens)



Other than heat the fuel MUST BE ABSOLUTELY IMMACULATELY CLEAN. NO free water, NO particulate, NO bio whatever, WELL lubricated.



Try this, unlock your hood to the safety position (ie beter underhood air flow), secure it well so it will not pop open while driving (would be a disaster if it popped open), and try that to see if it is heat related. When you stop for an extended period (work, night, etc) pop the hood to vent the heat.



Will be interesting to see if better air flow works



Bob Weis

 

[NoSeeUm]

Ack Bob, now I really need a hood scoop.



Jim