2nd Gen Non-Engine/Transmission batteries and lift pump

[DVR]

i replaced the lift pump in my truck a couple of months ago. it was loosing pressure at low rpm's.



last weekend my truck would not start and the batteries were almost dead. i had never had any signs of trouble with batteries. i charged the batteries, started it and noticed i had very low fuel pressure. thought to myself- glad i have a couple more school bus lift pumps.



i put in two new group 27 batteries tonight. both are matched from the same mfg, same date code and picked up from the warehouse.

the truck fired right up and the fuel pressure was fine.



the motor spins over much quicker than before. looks like the lift pump was not getting enough voltage either.



i ordered larryb's starter contacts and plunger and will put them in as soon as they get here. i'm at 111k.

 

[Brockway]

i have a long 01 qc ctd never had athing happen but its dead pedal now and trying to figure out why i did the key test got the p1693 had it check by the guy i towed it to they got 1688 and another one i for got but maybe there is something else,please help ,tdr member larry 77,789 miles on it need help before i blow the dough

 

[Brockway]

help me please dead 01 long box 77,789 stock

some help please my truck never had any signs of problems now she die pulling away from the light dead pedal key code 1693 dia codes 1688 another i for got . have to check it again, don't know where to start . any and all info will bless me.

 

[Moose Truck]

some help please my truck never had any signs of problems now she die pulling away from the light dead pedal key code 1693 dia codes 1688 another i for got . have to check it again, don't know where to start . any and all info will bless me.

"P1688 (M) Internal Fuel Injection Pump

Controller Failure

Internal problem within the fuel injection pump. Low

power, engine derated, or engine stops"



Your VP44 is most likely Hosed The code list, By TTMT is at: https://www.turbodieselregister.com/forums/showthread.php?t=96634



I PMed you back II's Internet URL. I find their site a little tough to use. Moose

 

[mhenon]

i replaced the lift pump in my truck a couple of months ago. it was loosing pressure at low rpm's.



last weekend my truck would not start and the batteries were almost dead. i had never had any signs of trouble with batteries. i charged the batteries, started it and noticed i had very low fuel pressure. thought to myself- glad i have a couple more school bus lift pumps.



i put in two new group 27 batteries tonight. both are matched from the same mfg, same date code and picked up from the warehouse.

the truck fired right up and the fuel pressure was fine.



the motor spins over much quicker than before. looks like the lift pump was not getting enough voltage either.



i ordered larryb's starter contacts and plunger and will put them in as soon as they get here. i'm at 111k.

I've noticed when it's cold, and the grid heaters come on, the idle is very busy. . the tack is bouncing around. Once the heaters go off-line the idle is like a rock.

I'm pulling the relays to the grid heaters and just going to plug the truck in at night. Starting to think voltage fluctuations etc might be part of the LP problem.

Think I'll go over to NAPA and have them check the batteries. They seem to be working fine. . but... .....

Mike