2001 3500 code p1689
06-11-2015, 11:48 AM
#1
Registered User
Thread Starter
2001 3500 code p1689
engine runs good almost all the time, when under heavy load, it will hit a surge, but letting off it will recover, I disconnected the bd tuner, and code cleared it, and it will still surge on the rare heavy acceleration. im guessing the communication error wont have anything to do with lift pump or filter?
06-11-2015, 05:56 PM
#2
Registered User
engine runs good almost all the time, when under heavy load, it will hit a surge, but letting off it will recover, I disconnected the bd tuner, and code cleared it, and it will still surge on the rare heavy acceleration. im guessing the communication error wont have anything to do with lift pump or filter?
06-15-2015, 01:26 PM
#5
Registered User
The only fuel pump options you have is either stock or aftermarket. There are two versions of stock: A fuel pump mounted to the drivers rear side of the engine block or the recall version which is mounted inside the fuel tank. You should know if you have an aftermarket fuel pump too.
And what do you mean 10-15 psi idling to full load? Are you saying its 10 psi at idle and 15 at WOT? Or the other way around? And how are you reading the fuel pressures?
And what do you mean 10-15 psi idling to full load? Are you saying its 10 psi at idle and 15 at WOT? Or the other way around? And how are you reading the fuel pressures?
06-15-2015, 01:39 PM
#7
Registered User
You have 400k miles on a replacement VP?
Those are surprisingly good numbers from the in-tank fuel pump. What gauge are you using to read the fuel pressures?
Those are surprisingly good numbers from the in-tank fuel pump. What gauge are you using to read the fuel pressures?
Trending Topics
06-15-2015, 05:40 PM
#9
Registered User
Then unfortunately it sounds like the VP's computer (PSG) is not the most updated version and is showing signs that the lead free solder is compromised from heat and resulting in intermittent connections. That said, does the VP have any identification on it? A name on the ID stamp location or something on top of the PSG cover? Also, whats the long number on the side of the PSG right next to the bar code? The VP on there may have come from a less desirable source.
06-16-2015, 09:28 AM
#14
Registered User
It looks like your VP is a OEM factory version which is odd to me since you say it say "reman" on it. 
What I mean is, back in the day when the VP's so commonly failed along with the factory lift pumps, the dealers who did the work installed new VP's from the parts counter.....along with new lift pumps or under recall, replaced the lift pump with the in-tank version.
I was under the impression that there was no remanufactured VP's which came from the dealer. Maybe there were specific dealers who were supplying themselves VP's at lower costs than that of factory from some other sources. In saying that, there are only so many certified VP reman sources. Still today there's only a small handful. And to what level of quality they remanufactured them is another story. One of the most common reman issues was leaving the currently working PSG in place. About six or seven years ago it was discovered that the PSG experienced "heat cycles" during every shut down as the hot engine heat soaked the cooler VP. After X number of heat cycles the PSG could fail. How many heat cycles?.....no one knew or knows, but replacement of the PSG with a brand new one became the standard for quality reman vendors. Not long after did the most current PSG version come out and was the one to use above all to combat heat cycles due to lead free solder.
So in point, I cant really help you know where your VP came from since I can only decipher some of the numbers. And really it wouldn't matter either since the likelihood is there's no warranty left and the vendor wont do anything. If you're going to replace the VP then making sure you use a quality reputable vendor who uses the most up to date PSG is what you want.
What I mean is, back in the day when the VP's so commonly failed along with the factory lift pumps, the dealers who did the work installed new VP's from the parts counter.....along with new lift pumps or under recall, replaced the lift pump with the in-tank version.I was under the impression that there was no remanufactured VP's which came from the dealer. Maybe there were specific dealers who were supplying themselves VP's at lower costs than that of factory from some other sources. In saying that, there are only so many certified VP reman sources. Still today there's only a small handful. And to what level of quality they remanufactured them is another story. One of the most common reman issues was leaving the currently working PSG in place. About six or seven years ago it was discovered that the PSG experienced "heat cycles" during every shut down as the hot engine heat soaked the cooler VP. After X number of heat cycles the PSG could fail. How many heat cycles?.....no one knew or knows, but replacement of the PSG with a brand new one became the standard for quality reman vendors. Not long after did the most current PSG version come out and was the one to use above all to combat heat cycles due to lead free solder.
So in point, I cant really help you know where your VP came from since I can only decipher some of the numbers. And really it wouldn't matter either since the likelihood is there's no warranty left and the vendor wont do anything. If you're going to replace the VP then making sure you use a quality reputable vendor who uses the most up to date PSG is what you want.
06-17-2015, 08:13 AM
#15
Registered User
Thread Starter
what kind of job is it to disassemble the psg away from the pump for replacement? I see it has security torx screws holding it down. ive also tracked down another pump listed as new/used, still debating.