99 confused

We have never got any of those codes and what it did have cleared after the boost sensor replacement. We have a shop down the street that rebuilds alt. and we can take it there for rebuild and hopefully the test. I will have to look around for someone that rebuilds computers here in arkansas, maybe little rock or fort smith.

Thank you for all your help so far

My husband just drove the truck, it ran great, he floored it for aways, when he went to go again it would hardly move. After a little ways it got power again, he wonders if there is a sock filter in the tank and if it can cause the problem.

We will try to get the pictures posted today. We are new at this, he said he is use to mechanical pumps and not electronic ones. I will take the pictures, but the pump is wrapped in a rubber sleeve, it is not standard from what we have seen on line. Two of them are cut and just there and I just spoke to him and he said that one of them is wired to the fuse box. We just don't know where to draw the line we don't have the money to keep putting into it, we are just stuck. Some people have said that the Vp is bad others have said the lift pump and now maybe the ecm, we just don't know what to do. Should we hook the wires back together and start over or what. We don't know what others have done to it that we can't see. Please help I really don't want to get rid of it but if a simple fix is not found it looks like we are going to have to get rid of it and look for a v8 that will pull our 5th wheel. I'm sorry I just keep ranting.

Thank you, thank you. Yes that is the wires, could that be causing all the issues. It's not getting the right voltage to keep the pump working. I hope it is going to be that easy, but why would they cut them, what would cause them to do that. I know a lot of questions, but this is the closest we have got to answers. Can you run a wire direct from the ecm to the fuse box or is that just immposable, we just want it to run right and be trustworthy and not have to worry that it's going to leave us on the side of the road. We will try to get the pictures posted today. We are new at this, he said he is use to mechanical pumps and not electronic ones. I will take the pictures, but the pump is wrapped in a rubber sleeve, it is not standard from what we have seen on line.

Yes on the fuel lines, and yes on the filter. We replaced the boost sensor, cause of codes that showed up and the codes are gone, and we are not sure on the man. of the lift pump, it was on the truck when we got it. Also we are concerned about the wires being cut, I can't say it is butchered up, but we do want to know about the wires, going into the ecm. Yes we can take a picture. We will see if we can get it done today. The wires are yellow with a white tracer and it is both wires not just one.

Well we think it drops about 10 psi. It real funny cause you will be driving it and it runs fine and then it just falls flat on its face and has no power but still runs, but you can hear the engine drop along with the pressure, you let it build back up and it runs great all kinds of power then repeat the process and it does it all over again. We have replaced the boost sensor, the tps, the filter and also the temp sensor, but took it back cause the old one worked just fine. We just don't know what to do next, we are spending money that we don't have and he is just frustrated and not sure what to do next. We like the truck yes it was very neglected and not in the best shape, we are dodge people and thought we would try a diesel but so far that has bit us I the butt. Please help, we do not have 1,200 dollars to replace the vp, and it runs alot better then when we got it, everything that we have done has improved it, this is the one thing that has us stumped. The new lift pump will be here next week and it runs at 18 psi. And sorry that was suppose to be reved pressure, he gets it to about 2200 rpm or 2300 rpm and it just falls flat, pretty fast to, it will not take the throttle, it's just flat till it builds pressure again.

We recently purchased a 98.5 laramie slt, and we have fixed the boost sensor the tps and replaced the filter, we are now looking to replace the lift pump. We rented a fuel pressure gauge and hooked it up and we got idle pressure of 19 to 20 and reed pressure of 10 to 11, we have been told that it should run a constant pressure of at least 14 to 16. When we removed it we noticed some wires were cut, yellow with a white tracer going into the ecm and it is both wires. We have done a lot to this truck and we are at a loss, when we rev it up the pressure drops and the engine starts to run flat has no power. Please help us.