Truck missing bad

[mountaindan]

I have a 1998 24 v 3500, It left me sitting on the road with a 40 ft camper . I have replaced the fuel filter, fuel presure stays around 17, there are no codes, was just wondering if it could possible be a crank shaft sensor? or any other ideas. It just keeps cutting out and back on afraid the u joints and transmission will go,thanks

[dripley]

How are you checking for codes? Your 98 will need an obdII scanner to check them. The IP can go with out codes on occasions. I would think you would have a code for a bad sensor.

[mountaindan]

I have a scanner it reads both ecm and pcm codes, no codes Not sure if the vp will always give a code or just fail.

right now I am grasping for straws till the weather clears a little thanks

- - - Updated - - -

sorry I missed about the ip on your post, I sure hope it is not the ip.

[Mopar1973Man]

Fuel pressure?

[mountaindan]

I have a new FASS 150 and it runs 17 psi +_ 2 all the time, that is on the output of the filter, should it be higher?

[98whitelightnin]

17 is good, thats what my fass runs. So what is the truck doing?

[mountaindan]

Just cutting on and off even misses at idle, at 50 mph it will almost jerk you out of the seat, no power, 1 gear to get the rv in to the parking lot

[mountaindan]

99% sure I need a IP any susjections best place to look?

[CSM]

Ok, so it misses under load... Will it run smoothly otherwise? I recently had a VP on my 2000 go... It would idle great, and run good to about 1/3 throttle and then cut out completely and buck.

[mountaindan]

Now it will not start and I have a 1689 code, I have fuel to the pump and power to the pump, but nothing out of the injector lines.

[Mopar1973Man]

Sound like the VP44 is taking a dirt nap on you. Sorry... http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/228-p1689-no-communication-between-ecm-and-vp44 Try hitting the vendor list. http://articles.mopar1973man.com/mopar1973mans-dealer-contacts/12-dealers--vendors Site favorite is Diesel Auto Power (Jacob Kidd)

[mountaindan]

Thanks everyone for all the help and suggestions

[mountaindan]

I have a IP pump on order from DAP, sould be here first of the week. Hopeing that is my only problem

[mountaindan]

Just completed the install of a VP-44 from DAP, truck fired up and runs great. Would like to thank everyone here for all the help and support, expecally the tech at DAP which was very helpful. Truck had no codes till it completly went out and only a 1689 then, missed and no power for the last 1000 miles. Hopeful it will be good for another 130000 miles.

[Mopar1973Man]

If I wasn't so pressured by the truck owner I would of had a perfect time to do a write up of the VP44 install I just done last week. :banghead:

[mountaindan]

It was really easy, just take your time. The hardest part was pulling the 125# on the shaft gear nut.