hey guys i am new here and need some help i have a 99 dodge 2500 mega cab 4x4 with 24v. trans only has 200 miles and i just replaced engine. engine starts up and runs strong. but doesnt rev past 2000 with out cutting out and usually first take off going down the road it will go threw the gears and some times not. then when u stop and go to go again it wont shift from second to third. and engine cuts in and out. i am getting codes for injection pump not communicating with ecm , and a code for ecm and pcm not communicating, i have checked all fuses and grounds. can anyone help me please.

 

this is random but my buddy just went through the same thing and it turned out to be low battery voltage he had one battery that was down to 8 volts and his alternator was on its way out and was causing the computer to cut in and out .. hope that helps

 

ok i will test my battery and test my alternator and see what i come up with. thanks for the info

 

I wasn't aware they made a mega cab in 99

 

your right its quad cab

 

My 97 had a similar problem, although it was not computerized, the fuel pressure at higher rpms would get cut down, when hitting 5th gear it would stop, just installed another lift pump, and it fixed the problem.

 

thanks for the info i did check my fuel pressure on the lift pump. mitchell ondemand says with out the truck running the fuel pressure should be 5 -7 psi and running should be 10 psi i didnt even get 5 psi. i changed pump using the one that came off the other engine it didnt seem to help. i will check the fuel pressure on this pump next. i did change both batterys thinking i had weak battery. didnt help either also changed all sensors on the engine no luck. i still need to check alternator.

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where could i get a good deal on a lift pump?

 

i installed new lift pump still getting code for no comunicatin between emc and injection pump still cutting out at high rpm any info that could help?

 

Try an APPS reset...


Below is the pdf that tells you how to do it.

 

Try this, my 01 had the same code, basically its the VP44 death code however the fuel relay will kick the same code if it goes bad. Change the Fuel system relay, in the fuse block under hood. If that doesnt help sounds like your VP44 is shot.