dies on decel

rkscout · 07-24-2008, 02:44 PM

So here's the problem. Took my '99 ctd in 2 months ago to the local diesel performance shop. I had before going in, juice with attitude, 40hp injectors,airaid air filter, 4" exhaust. The problem I had was that the fuel pressure was dropping to zero even at 1/4 throttle. Had the updated in tank pump from dodge and was allready on my third injector pump. I wanted a better fuel pump than the dodge one, so I went with the raptor pump. While he installing the pump finds the head gasket leaking. Removes the head, sends it out to the machine shop and it has 7 cracks in it. So new head and pump later it still has no fuel pressure. So a remaned injector pump goes in. Now here comes the problem. I pick it up, go down the road to the stop sign. Push in the clutch (5spd) and when the rpm drops to 800 it starts surging a few times between 400 and 800 and then dies. It will fire right back up though. It happens more when I have to stop quickly, push in the clutch and hit the brakes. I can keep it from dieing if I bring the rpms down slowly. The performance shop changed the pump to another remaned one and it still does it. It also has 90hp injectors in it now. It also won't fire right away after it has been sitting for awile. It acts like there is air in the system, but there are no fuel leaks. The performance shop couldn't figure it out so I took it to the local dealership and they couldn't figure it out either. Any ideas? '99 2500 4x4, 5spd, regular cab service box. Leveling kit, 35"s, jacobs exhaust brake, stock turbo, edge juice with attitude, 90hp injectors, airraid, 4" turbo back.

Buck08 · 07-24-2008, 02:58 PM

Whats the fuel pressure running?

__________________
07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

rkscout · 07-24-2008, 03:05 PM

19psi at idle low @14 at wot on 5 setting

Buck08 · 07-24-2008, 03:25 PM

Does the pressure drop to zero right before it dies?

__________________
07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

rkscout · 07-24-2008, 03:37 PM

No pressure drop. 19psi. Thing is, the truck ran great before I brought it in.

Buck08 · 07-24-2008, 03:45 PM

Wow,you have me stumped. Hopefully someone else on here will have an idea. Did you check the obvious, fuel filter? Otherwise ihe only thing I can think of is air in the system.

__________________
07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

rkscout · 07-24-2008, 04:02 PM

Yep, changed it out. I'm an ag mechanic, so I'm pretty knowledgeable when it comes to these things, but it has me pretty well stumped too.

Buck08 · 07-24-2008, 04:03 PM

I figured so. Yep im stumped

__________________
07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

upallnite · 07-24-2008, 04:23 PM

this may sound a little stupid but, have you checked for water in the old tank. these old truck because of the mounting straps will hold water in the pockets or bowls created in the bottom of the tank. these reason for the question is--this pump keep replacing use to be quite reliable even if the transfer pump went out. also where are you getting the remans from? anything can rebuilt a 1000 different ways and only 1 way is correct.

upallnite · 07-24-2008, 04:31 PM

just one other thought. ck for any loose wiring such as grounds connections and plugs that could have been left unconnected or not completely connected during the head job.

upallnite · 07-24-2008, 04:34 PM

sound very much like an apps is out of adjustment or going bad.

rkscout · 07-24-2008, 04:36 PM

When I changed out the filter, there was no water in it. Great idea on the ground though. I'll check that out.

07-24-2008, 02:44 PM	#1 (permalink)
rkscout Newbie Join Date: Jul 2008 Location: windsor, ca Posts: 14 rkscout's Truck Pics	dies on decel So here's the problem. Took my '99 ctd in 2 months ago to the local diesel performance shop. I had before going in, juice with attitude, 40hp injectors,airaid air filter, 4" exhaust. The problem I had was that the fuel pressure was dropping to zero even at 1/4 throttle. Had the updated in tank pump from dodge and was allready on my third injector pump. I wanted a better fuel pump than the dodge one, so I went with the raptor pump. While he installing the pump finds the head gasket leaking. Removes the head, sends it out to the machine shop and it has 7 cracks in it. So new head and pump later it still has no fuel pressure. So a remaned injector pump goes in. Now here comes the problem. I pick it up, go down the road to the stop sign. Push in the clutch (5spd) and when the rpm drops to 800 it starts surging a few times between 400 and 800 and then dies. It will fire right back up though. It happens more when I have to stop quickly, push in the clutch and hit the brakes. I can keep it from dieing if I bring the rpms down slowly. The performance shop changed the pump to another remaned one and it still does it. It also has 90hp injectors in it now. It also won't fire right away after it has been sitting for awile. It acts like there is air in the system, but there are no fuel leaks. The performance shop couldn't figure it out so I took it to the local dealership and they couldn't figure it out either. Any ideas? '99 2500 4x4, 5spd, regular cab service box. Leveling kit, 35"s, jacobs exhaust brake, stock turbo, edge juice with attitude, 90hp injectors, airraid, 4" turbo back.

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07-24-2008, 02:58 PM	#2 (permalink)
Buck08 Diesel Freak Join Date: Jan 2008 Location: NW Iowa Posts: 682 Buck08's Truck Pics	Whats the fuel pressure running? __________________ 07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

07-24-2008, 03:05 PM	#3 (permalink)
rkscout Newbie Join Date: Jul 2008 Location: windsor, ca Posts: 14 rkscout's Truck Pics	19psi at idle low @14 at wot on 5 setting

07-24-2008, 03:25 PM	#4 (permalink)
Buck08 Diesel Freak Join Date: Jan 2008 Location: NW Iowa Posts: 682 Buck08's Truck Pics	Does the pressure drop to zero right before it dies? __________________ 07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

07-24-2008, 03:37 PM	#5 (permalink)
rkscout Newbie Join Date: Jul 2008 Location: windsor, ca Posts: 14 rkscout's Truck Pics	No pressure drop. 19psi. Thing is, the truck ran great before I brought it in.

07-24-2008, 03:45 PM	#6 (permalink)
Buck08 Diesel Freak Join Date: Jan 2008 Location: NW Iowa Posts: 682 Buck08's Truck Pics	Wow,you have me stumped. Hopefully someone else on here will have an idea. Did you check the obvious, fuel filter? Otherwise ihe only thing I can think of is air in the system. __________________ 07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

07-24-2008, 04:02 PM	#7 (permalink)
rkscout Newbie Join Date: Jul 2008 Location: windsor, ca Posts: 14 rkscout's Truck Pics	Yep, changed it out. I'm an ag mechanic, so I'm pretty knowledgeable when it comes to these things, but it has me pretty well stumped too.

07-24-2008, 04:03 PM	#8 (permalink)
Buck08 Diesel Freak Join Date: Jan 2008 Location: NW Iowa Posts: 682 Buck08's Truck Pics	I figured so. Yep im stumped __________________ 07 silver Mega cab 5.9 6 sp smartyjr and some other stuff

07-24-2008, 04:23 PM	#9 (permalink)
upallnite Newbie Join Date: Mar 2008 Posts: 6 upallnite's Truck Pics	this may sound a little stupid but, have you checked for water in the old tank. these old truck because of the mounting straps will hold water in the pockets or bowls created in the bottom of the tank. these reason for the question is--this pump keep replacing use to be quite reliable even if the transfer pump went out. also where are you getting the remans from? anything can rebuilt a 1000 different ways and only 1 way is correct.

07-24-2008, 04:31 PM	#10 (permalink)
upallnite Newbie Join Date: Mar 2008 Posts: 6 upallnite's Truck Pics	just one other thought. ck for any loose wiring such as grounds connections and plugs that could have been left unconnected or not completely connected during the head job.

07-24-2008, 04:34 PM	#11 (permalink)
upallnite Newbie Join Date: Mar 2008 Posts: 6 upallnite's Truck Pics	sound very much like an apps is out of adjustment or going bad.

07-24-2008, 04:36 PM	#12 (permalink)
rkscout Newbie Join Date: Jul 2008 Location: windsor, ca Posts: 14 rkscout's Truck Pics	When I changed out the filter, there was no water in it. Great idea on the ground though. I'll check that out.