Engine/Transmission (1998.5 - 2002) Accelerator cuts out WOT

[SnoKing]

I had it because a bad fuel line connection was letting in a tiny amount of air (sometimes). The VP-44 doesn't like air bubbles in the fuel. Still ended up with a new VP-44 and TPS before they dropped the tank and found the leak. Oh well. At lest I have an upgraded injector pump that should outlast me.

And you still had P0216 error codes after install a new VP-44? SNOKING

 

[Road Dog]

And you still had P0216 error codes after install a new VP-44? SNOKING

Yes, still had the P0216 and limp mode which led to diagnosing the fuel issue.

 

[JR]

Heres what Chip has to say about the 0216 code. Scroll down to "Pertinent codes"

http://www.bluechipdiesel.com/vp44diagnostichelp.html

 

[SnoKing]

OP says he has good fuel! Chip says good fuel pressure, drivability issues and P0216 equals new injection pump, using a little reverse logic.

"In my experience the 216 code is not a “Death Code” as some people say. It only tells you the Injection Pump can’t attain full timing advance to provide good fuel mileage and power. If this is the ONLY code and you don’t have any drivability issues, the VP44 does not need to be replaced, and most likely will not put you on the side of the road. If you DO have the 216 code you should check your Lift Pump pressure UNDER LOAD as Lift Pump pressure is what moves the timing piston and advances timing, so if Lift Pump pressure is low, that may be the cause of the 216 code. If the pressure is good, then the code means the housing of the Injection Pump is worn out, which all by itself, still isn’t a good enough reason to replace it, in my mind."

 

[JR]

He says fuel pressure is fine but doesn't say what that is.
Just trying to offer as much info as possible to help him better diagnose everything so he's more comfortable in his decision. It really sucks spending big money on parts that dont need replaced.

 

[SierraTango]

Code 0216 is paired with 1693

 

[SnoKing]

P1693, means there a code in the over module, that is PCM. No big deal. Snoking

 

[cerberusiam]

If the APPS is bad enough to go dead pedal, it throws pertinent codes.

Limp mode and P0216 can have other sources, not always the IP but frquently it is.

Dead pedal and P0216 almost always equals a new VP-44.

 

[SnoKing]

If the APPS is bad enough to go dead pedal, it throws pertinent codes.

Limp mode and P0216 can have other sources, not always the IP but frquently it is.

Dead pedal and P0216 almost always equals a new VP-44.

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I believe I have been telling S-T that from the beginning of his thread! SNOKING

 

[SierraTango]

Just for the sake of it, does a bad APPS throw any specific code? Since I had first posted I have not had a reoccurrence of the "dead pedal" which is what I find odd, because if 0216 is almost always as stated a bad injection pump, wouldn't the symptoms be consistent and or getting worse?

All I'm waiting for now is payday for parts to be ordered.

 

[cerberusiam]

P0122- Throttle Position Sensor voltage low
P0123- Throttle Position Sensor voltage high
P0216- Insufficient ECT for stable operation (this usually means the VP44 is shot)

These 3 codes are usually what you would get, the first 2 indicate an APPS problem when accompanied by dead pedal. The 3rd one and dead pedal is usualy the IP.

I say usually becasue there is an exception to every rule, you have to go thru the process and read the codes and test.

 

[SierraTango]

What does ECT stand for?

 

[SnoKing]

Just for the sake of it, does a bad APPS throw any specific code? Since I had first posted I have not had a reoccurrence of the "dead pedal" which is what I find odd, because if 0216 is almost always as stated a bad injection pump, wouldn't the symptoms be consistent and or getting worse?

All I'm waiting for now is payday for parts to be ordered.

My VP-44 experience was as follows.

HOT weather in the SW. Bit if extended crank times vs hit the key and it was running.
5 or 6 months later, a first case of dead pedal. A week of so later a second case of dead pedal. Found P0216 along with standard codes the DTT trannies create.
Replace the VP-44 at 52K. Now at 120K and 8 or 9 years later. Always fires right up, hot or cold weather, and no more dead pedals.

The two dead pedals were a couple blocks from the house when first driving in the day. The later VP-44 had brass bores is the advance mechanism which were prone to early failure.

Snoking

 

[cerberusiam]

What does ECT stand for?

IIRC, Electronic Controlled Timing. It could be ETC and it was fat fingered at some point. Suffice to say either means the FPCM is trying to set demnaded timing and is failing to do so.

Had 2 different trucks that both ended with a new IP. Neither behaved like others and both were different manifestations.