Rough Idle - Page 2

SheffDodgeD250 · 11-06-2009, 05:24 PM

Thats what i was thinking. I just out a new one in and i think there is a little bypass in it but jfc just put a new one on and hes still having the same problem

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

jfc · 11-06-2009, 06:02 PM

Guess its possible I got a bad LP from NAPA, but i wana try bleeding it properly,

Any suggestions on how to easily turn the crank 90 degrees? the lift pump primer does nothing when in the wrong position on the shaft, and when I crank the engine over it always stops on the same spot.

__________________
92, 250, ext cab, 4x4, 5 speed

SheffDodgeD250 · 11-06-2009, 07:00 PM

Well i've been out there fooling with the truck and i just cracked the lines at the injectors and the third injector in was just bubbling and no fuel. so i gave it sum throttle and just kept bubbling and then now it wont go back to an idle.

PS I'm taking a break because i have an exhaust leak at the turbo so i'm getting exhaust in my face.

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

powerbrake · 11-06-2009, 07:13 PM

that is what i was also wondering because what you have going on is not so much a rough idle as a surging.

__________________
92 4x4, fuel screw turned in all the way, starwheel dropped to the bottom, 40 hp injectors, machined pin, detroit locker lets me smoke 'em evenly. auto meter pyro.

God Bless Our Country and Damn The Goverment

SheffDodgeD250 · 11-06-2009, 10:28 PM

Found it. The fuel hose that leads into the lift pump had a small rip in it and it was pulling air into the system. So JFC idk if u checked that yet but that was my problem. now i'm onto fixing my exhaust leaks.

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

jfc · 11-07-2009, 01:31 AM

Quote:

Originally Posted by SheffDodgeD250

Found it. The fuel hose that leads into the lift pump had a small rip in it and it was pulling air into the system. So JFC idk if u checked that yet but that was my problem. now i'm onto fixing my exhaust leaks.

damn i just took a diesel shower, cracked all injectors a good half turn for 30 sec each, three times, and still runs like crap, I even turned the engine 90 degrees (ended up being more like 180, and bled the low pressure side before. I used channel locks to turn the main camshaft nut (only thing I had narrow enough to do it), what size is that nut so I can buy a wrench for it?

I wish I was on to fixing exhaust leaks

Sheff did you pressurize your tank to find the spot? and if so how?

__________________
92, 250, ext cab, 4x4, 5 speed

SheffDodgeD250 · 11-07-2009, 10:58 AM

Well this morning was the ultimate test and it failed. Still having the problem.

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

SheffDodgeD250 · 11-07-2009, 07:54 PM

Well my LP is done it wont hold pressure. But i found the main problem. Where the orange line is, thats the crack in the injector.

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

jfc · 11-07-2009, 11:10 PM

that suck sheff, I will see if I got any cracks, i put some air pressure in my fuel tank, and didn't find any leaks, the only thing I found was air coming out at the top of the tank possible from the fuel return line, hard to tell

__________________
92, 250, ext cab, 4x4, 5 speed

SheffDodgeD250 · 11-08-2009, 10:28 AM

Yeah I only noticed it after i cracked the line at the injector and it was wet with fuel and i saw it bubbling. Use wd40 if you don't want to crack your injectors again

__________________
91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

Left out in the cold · 11-08-2009, 11:28 AM

Or is that the rubber dust seal, a square o-ring that is cracked. Most of mine looked that way when I change my injectors. Look at the back of the injection pump where the lines come out for leaks. Check the bolts on the block.

__________________
91.5 I/C W250 5sp 3.07s turned up pump 16cm2 M&H M2 BHAF Bosch +40s
92 W250 Xcab auto 3.54 bonehead stock

jfc · 11-09-2009, 12:06 PM

I think its my injectors..... as I washed the engine so I could see leaks ext better, and I got a fuel leak around the botom of three injectors....only had one leaking a year ago...... thats when I bought a set of injectors and never got around to it...

__________________
92, 250, ext cab, 4x4, 5 speed

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11-06-2009, 05:24 PM	#13 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Thats what i was thinking. I just out a new one in and i think there is a little bypass in it but jfc just put a new one on and hes still having the same problem __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

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11-06-2009, 06:02 PM	#14 (permalink)
jfc Cummins Fan Join Date: Aug 2009 Location: Fort St. John, BC Posts: 41 Thanks: 1 Thanked 0 Times in 0 Posts jfc's Truck Pics	Guess its possible I got a bad LP from NAPA, but i wana try bleeding it properly, Any suggestions on how to easily turn the crank 90 degrees? the lift pump primer does nothing when in the wrong position on the shaft, and when I crank the engine over it always stops on the same spot. __________________ 92, 250, ext cab, 4x4, 5 speed

11-06-2009, 07:00 PM	#15 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Well i've been out there fooling with the truck and i just cracked the lines at the injectors and the third injector in was just bubbling and no fuel. so i gave it sum throttle and just kept bubbling and then now it wont go back to an idle. PS I'm taking a break because i have an exhaust leak at the turbo so i'm getting exhaust in my face. __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

11-06-2009, 07:13 PM	#16 (permalink)
powerbrake Cummins Nut Join Date: Feb 2009 Location: charleston west by god Posts: 402 Thanks: 6 Thanked 11 Times in 10 Posts powerbrake's Truck Pics	that is what i was also wondering because what you have going on is not so much a rough idle as a surging. __________________ 92 4x4, fuel screw turned in all the way, starwheel dropped to the bottom, 40 hp injectors, machined pin, detroit locker lets me smoke 'em evenly. auto meter pyro. God Bless Our Country and Damn The Goverment

11-06-2009, 10:28 PM	#17 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Found it. The fuel hose that leads into the lift pump had a small rip in it and it was pulling air into the system. So JFC idk if u checked that yet but that was my problem. now i'm onto fixing my exhaust leaks. __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

11-07-2009, 10:58 AM	#19 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Well this morning was the ultimate test and it failed. Still having the problem. __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

11-07-2009, 07:54 PM	#20 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Well my LP is done it wont hold pressure. But i found the main problem. Where the orange line is, thats the crack in the injector. __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

11-07-2009, 11:10 PM	#21 (permalink)
jfc Cummins Fan Join Date: Aug 2009 Location: Fort St. John, BC Posts: 41 Thanks: 1 Thanked 0 Times in 0 Posts jfc's Truck Pics	that suck sheff, I will see if I got any cracks, i put some air pressure in my fuel tank, and didn't find any leaks, the only thing I found was air coming out at the top of the tank possible from the fuel return line, hard to tell __________________ 92, 250, ext cab, 4x4, 5 speed

11-08-2009, 10:28 AM	#22 (permalink)
SheffDodgeD250 Cummins Fan Join Date: Oct 2009 Location: Florida Posts: 52 Thanks: 4 Thanked 0 Times in 0 Posts SheffDodgeD250's Truck Pics	Yeah I only noticed it after i cracked the line at the injector and it was wet with fuel and i saw it bubbling. Use wd40 if you don't want to crack your injectors again __________________ 91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

11-08-2009, 11:28 AM	#23 (permalink)
Left out in the cold Cummins Nut Join Date: Jan 2009 Location: Sutton, Alaska Posts: 432 Thanks: 0 Thanked 14 Times in 13 Posts Left out in the cold's Truck Pics	Or is that the rubber dust seal, a square o-ring that is cracked. Most of mine looked that way when I change my injectors. Look at the back of the injection pump where the lines come out for leaks. Check the bolts on the block. __________________ 91.5 I/C W250 5sp 3.07s turned up pump 16cm2 M&H M2 BHAF Bosch +40s 92 W250 Xcab auto 3.54 bonehead stock

11-09-2009, 12:06 PM	#24 (permalink)
jfc Cummins Fan Join Date: Aug 2009 Location: Fort St. John, BC Posts: 41 Thanks: 1 Thanked 0 Times in 0 Posts jfc's Truck Pics	I think its my injectors..... as I washed the engine so I could see leaks ext better, and I got a fuel leak around the botom of three injectors....only had one leaking a year ago...... thats when I bought a set of injectors and never got around to it... __________________ 92, 250, ext cab, 4x4, 5 speed