Hey my name is patty, my husband has a 1993 dodge, 5.9 turbo diesel truck.
The truck started missing when it was put in idle, so my husband changed the fuel filter and the fuel pump. Then a week later it would not start one day, so he ran the codes and it gave him code 24. He changed the tps and the truck started right up. The truck runs better but still idles funny. He needs to know how to get the truck to idle correct?

This is my first time posting, so if their is more info that is needed for anyone who may be able to help my husband, please let me know.
P.S. after he changed the tps, he ran the codes again and their were none.

Thank you.

 

Hi Patty, welcome to DTR.

It sounds to me like the truck has an air leak in the suction side of the fuel system. Somewhere between the tank and the lift pump (located just above the starter motor) air is getting in. You can plumb in a short piece of clear plastic hose right at the lift pump to confirm this. If you see bubbles, the truck is sucking air.

I'm very sorry about the TPS. All the TPS controls on your truck is the overdrive gear in the transmission, it has nothing to do with running the engine.

BTW, what kind of pistol? I'm a revolver guy myself.

 

what do you mean when you say your sorry about the tps. Did I buy one for nothing?
also if it's sucking air will it only do it at idle and not going full throttle. just curious

p.s. it's a glock 17 pistol

 

Thats right the only thing the TPS does is to engage your overdrive in the transmission. So you basically bought it for nothing, unless your overdrive wasn't working.

 

Patty, the no-start is mainly what has me thinking there's air getting in. Sometimes they will run OK under load with an air leak. Does the truck just idle rough, or is it hunting up and down? Often a rough idle is due to the idle speed being set too low, these things are really shaky at low RPM. It should idle at 700 RPM with the A/C on in Drive.

If you think the rough idle is due to a steady miss, start the truck cold and loosen the injection lines one by one until you find the one that doesn't make the truck idle worse. This is just like pulling plug wires off a gasser to find the dead hole. Once you narrow it down to a specific cylinder, check the valve adjustment. If that's OK, you can switch injectors and see if the miss moves with the injector.

The G17 is a modern classic.

 

the truck doesn't idle rough, it does the hunting thing up and down.
should he still do the same thing you suggested?

by the way, thanks for your help.

 

Hunting is not a good sign, the injection pump may be on its way out. Check for air first, and make sure the idle speed is right.

Anybody else want to chime in with a second opinion?

 

Yeah, the hunting seems to be a bad sign. Has the truck failed to shut off when the key was turned off lately? That's what mine did about a week before it went. When it finally did go, it started up, then hunted up and down, up and down, then it was normal for a few miles, then it just died

 

the truck is idling and then it starts to flutrate. I can give it fuel and thottle and it will flutrate more. but when it gets to 2000 rpms it will stop flurating.
Sorry about the spelling.

 

It could still be air getting in .I would check for air first then make sure the lift pump is good and that the injector pump is not having to suck its own fuel.air in the injectors will cause a flutter or miss and make the engine shake .some times just taking it out and runing it real hard will make it stop and start to idle good again. then check and see if it is an injector gone bad Like wannadiesel said "open or move them to a diff cylinder" if its still doing it probably the injector pump.

Do you know how old or the milage on that pump??
were are you located at there might be a DTR member close by to help?

 

Welcome to DTR, I like the "Tactical Tupperware" myself, Glock 21, throws a big slow rock up to 13 times.

A friend has a 250 Cummins in a trawler. It was doing the exact same thing. The idle speed would go up and down very noticably. HE was afraid to leave the dock because of it. Turned out to be an air leak right at the lift pump suction due to a cracked flare. I cut the line and reflared it, it was a copper line on the boat, and the symptom went away. Sure hope you are as lucky.

 

I have also had the same problem and in my case the addition of a fuel additive solved the problem. The mechanic who looked at it suggested the additive as a "paliative measure"....whatever they call it, it seemed to do the trick. I'd try that as it's an easy fix...maybe. Good luck!!
Chuck

 

My husband checked for air leads and the injectors, but there was no sign of either. My stupid *** husband said the truck starts right up, but when it gets warm its starts to hunt up and down. Idling very slowly when he sitting still in drive. If he puts it park it idles up and down. He turns the truck off, and 5 minutes later, he tries to crank the truck, it will not crank. He waits a day later, he turns truck on it cranks right up. Its done the same thing twice in a month.
Can anybody, please HELP ME! Help my stupid *** husband!!!!!!!!!!!!!!!!!! please

P.S. they don't call me pistol patty for nothing.

 

At this point I would throw a lift pump at it. It is relatively cheap and not too bad to replace. At the very least put a fuel pressure gauge on it to be sure.

"Gun Control" :Being able to repeatedly hit your target.

 

I'am sorry I didn't mention that he changed the lift pump as well as the tps. He changed the lift pump because it he is cheap, but not the tps.
if you have any more ideas, i'am interested.

p.s. I have gun control and he knows it!!!!!