Engine/Transmission (1998.5 - 2002) dead vp44 code 1688. Could high FP be the killer?

[nuv22]

This morning i was driving to work got on the on ramp to I95 and my truck just shut off. luckly i was able to man handle my truck to the shoulder with no PW steering and brakes. i turned the truck back on and it idles but it wants to die above 1300 RPM. i have codes 1688, 216, 251, 252, never seen so many in my life lol. so i cleared them and turned the truck back on and same deal. ok this truck has 203,000 on it all stock plus like i lost count how many LP's the last one i put on was a airtex now after doing this i had hard starts and stuff plus my FP was around 20 psi @ idle and 15-18 WOT. i know i am probably one of the lucky ones that it lasted that long but do you think the high FP finished it off? i live in florida so its also hot as hell down here i am sure that did not help. in addition to this question any tips to changing it out? any good places to purchase a new pump? any help would be great thanks a ton!

 

[Jdonoghue]

I'm not a pump rebuilder, but here's my idea:



High fuel pressure usually kills some part of the internal vane pump (some kind of diaphragm?). If this was the case, I'd think that you wouldn't have been able to get it restarted.



I'd guess that the failure is either in the electronics (pump module or AOR sensor). The fact that there's an 0216 in your list of codes, and that it doesn't want to rev higher than 1300 RPM indicates that the timing is stuck at some fixed value.



I really don't think it's related to the Airtex pump.



Jim

 

[AllianceDiesel]

I don't believe in it, from all the reading I have done from professionals about the vp44 failures, they say its mostly low fuel pressure causing a diaphragm to stretch too far.



You say thats the stock vp44 and you have gone though many lift pumps, that tells me that there has been many times where there has been low fuel pressure, over time that takes out the pump, I'm surprised it lasted this long.



no 1688 (are you sure it wasn't 1689- NO COMMUNICATION BETWEEN ECM & INJECTION

PUMP MODULE (OBD II)

no 0252

0216- death code (fuel injection pump timing failure)

0251- FUEL INJECTION PUMP MECHANICAL FAILURE FUEL

VALVE FEEDBACK CKT (OBDII)

 

[nuv22]

just checked again and it is 1688

internal fuel injection pump controller failure. YIKES!! by all means i am not complaining one bit about the vp44 to tell you the truth i am happy that it has ran for 200,000 miles. i allways kept an eye on my FP and as soon as i saw the LP act up i would change it before the pressures got below 8-9 while iddle and have both mechanical (tapped at the pump banjo) and digital gauges (after FF) just in case. Do you guys recomend anyone in specific where i should buy my pump? i guess i dont need to worry about the Fuel Pressure? i have seen some guys on this forum use a FP regulator and bring the FP down from 12-15 psi since the bypass in the vp44 opens at 14? sound right?

 

[AllianceDiesel]

i really like the glacier diesel pump Glacier Diesel Power - Product Detail , I have installed two of them, one on a stock truck with adrenaline and one on a heavily moddified truck and they are awesome, you can't beat the price either.

 

[blacksheepdiesel]

My AirDog has been putting out 19 psi for 295,000 miles. I just put in a new VP44 last month to replace one that had 262,000 miles on it. So the answer is NO, high fuel pressure (to a point!) doesn't kill the VP44. I buy my pumps from Scheid Diesel and they told me 260,000 is one of the highest mile VP's they have seen. I had the 0216 code and I believe from what I experienced the timing solenoid did stick. Scheid says the VP's die from fried electronics or the timing piston in almost all cases.

Godspeed,
Trent

 

[AllianceDiesel]

I seen one personally that came into the shop with over 200,000 hard miles on a completly stock truck, and I think I know of a truck on another forum that is highly modded with over 240,000 with stock vp44



they will last if you give them what they want and need.

 

[MKreiberg]

I have 237,000 on my VP44.

 

[FourBarR]

295,000 miles or 475,000kms on my vp-44 still going strong.