99 24 valve diesel surging - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 13 (permalink) Old 10-25-2009, 11:53 PM Thread Starter
 
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99 24 valve diesel surging

Hello everyone hope all is going to have a good halloween and thnx giving

I have a 99 dodge 24 valve and recently replaced the inj pump and lift pump because the truck was surging. It is really bad between 40 and 60 mph but does do it a little bit sometimes at 70 mph. The dealer ship replaced the inj and lift pump after troubleshooting it with diagnostic equip the first time. They told me they were 100% positive that would fix it. It has only been 1000 miles and the problem is back. Does anyone have any ideas what could be causing this? My gut says electrical or transmission not fuel but this is my first diesel.

thnx
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post #2 of 13 (permalink) Old 10-27-2009, 03:21 PM
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Lets start with simple information...

What's your fuel pressure like?
http://mopar.mopar1973man.com/tips/c...l-pressure.htm

Got any error codes? (You'll need a code reader)
http://mopar.mopar1973man.com/tips/c...rror-codes.htm

Fuel pressure is everything to these trucks. Then the error codes will tell you exactly what is failing to bugging the truck.

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116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #3 of 13 (permalink) Old 10-31-2009, 05:42 PM Thread Starter
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surging

Thanks for the links for troubleshooting. I will have to check the fuel pressure.

The dealer ship just replaced my inj pump and lift pump 1,000 miles ago and it still does the surging. Does it worse at 45 mph range. I don't have any engine lights or anything on but I will get codes read.

can I use a paper clip and jump the prongs in the obd plug under dash by ashtray to get the codes manually without a code reader?

I am in the Army and go to the field next week so it will be next weekend before I am able to let you know what I find out.

I kind of think it is something to do with the transmission cuz to me it acts like it can't make up its mind on whether or not to shift gears or not.
wut do you think?

Thnks for your help and I will keep you informed.
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post #4 of 13 (permalink) Old 10-31-2009, 08:29 PM
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Quote:
Originally Posted by jkz3883 View Post
Thanks for the links for troubleshooting. I will have to check the fuel pressure.

Yeap fuel pressure has a bearing on performance...

The dealer ship just replaced my inj pump and lift pump 1,000 miles ago and it still does the surging. Does it worse at 45 mph range. I don't have any engine lights or anything on but I will get codes read.

Check engine light doesn't come on for every error code. So read my write and it will tell how to get your error codes...

can I use a paper clip and jump the prongs in the obd plug under dash by ashtray to get the codes manually without a code reader?

Ummm... Either the key trick or the code reader... This is not a Chevy...

I am in the Army and go to the field next week so it will be next weekend before I am able to let you know what I find out.

I kind of think it is something to do with the transmission cuz to me it acts like it can't make up its mind on whether or not to shift gears or not.
wut do you think?

Error codes might give a clue... Once you have them you might have some information on what had failed.

Thnks for your help and I will keep you informed.
Comments in blue...

http://mopar.mopar1973man.com/tips/c...l-pressure.htm

http://mopar.mopar1973man.com/tips/c...rror-codes.htm

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #5 of 13 (permalink) Old 11-09-2009, 02:46 AM
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Autozone lets you use a code reader for free at the store.

"Some people are educated beyond their intelligence."

'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE

Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.

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post #6 of 13 (permalink) Old 11-26-2009, 05:48 PM Thread Starter
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Fuel pressure is good. Dealer ship said it is tps but they were wrong. picked it up and still does it.

I really think it has something to do with the transmission. It acts like it can't decide to shift or not. It takes forever for it to shift at 2nd and 3rd when accelerating normal. Once I am at 45 plus mph it goes back and forth in and out of gear (like a surge) fluctuating about 4 or 5 hundred rpms. Kind of like a torq convertor, shift solenoid, or something.

Help pls I am tired of dealing with dealer ship who apparently knows jack crap.

thnx and happy thnx giving
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post #7 of 13 (permalink) Old 11-27-2009, 04:14 AM
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Quote:
Originally Posted by jkz3883 View Post
Once I am at 45 plus mph it goes back and forth in and out of gear (like a surge) fluctuating about 4 or 5 hundred rpms. Kind of like a torq convertor, shift solenoid, or something.
Sounds like the transmission is hunting in and out of O/D. A known problem. My '99 has a NVG, so no worries for me.

"Some people are educated beyond their intelligence."

'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE

Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.

Traded off- '97 3500 C/C, 4x4, CTD

'92 W250, LE, CC, CTD w/ tweaked pump (SOLD)


"Obama = Hoax and Chains"

If Obama is the answer, it must have been a stupid question.
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post #8 of 13 (permalink) Old 11-27-2009, 10:21 PM Thread Starter
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Wut causes it to hunt in and out of o/d?
Wuts an NVG?
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post #9 of 13 (permalink) Old 11-28-2009, 01:02 PM
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the key trick wont work, its a 99

99 cummins, 5-speed, edge comp, speedhut guages, fass 150 system, s&b cold air intake, ces two piece manifold, 5 inch straight exhaust with a 6 inch tip, 5 inch superlift, 4:10 gears, dynatrack lock in lock outs, 35x14.50 thornbirds on 16.5x12 mickey tompson classic 2's, alpine head unit, 1600 watt amp, 2 12 inch subs
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post #10 of 13 (permalink) Old 11-29-2009, 02:59 AM
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Quote:
Originally Posted by jkz3883 View Post
Wut causes it to hunt in and out of o/d?
At a bad RPM range. Computer can't decide what gear to be in, or if the t/c lock up clutch should be engaged. Locking the O/D out prevents the hunting. Also, low RPMs and very light throttle pedal means low line pressure in the transmission, which leads to premature transmission failure. Not enough pressure to prevent the clutch packs from slipping.

Quote:
Originally Posted by jkz3883 View Post
Wuts an NVG?
New Venture Gear. They made the 4500 (5spd) and 5600 (6spd) manual transmissions used in our trucks and others. I have the 4500.

"Some people are educated beyond their intelligence."

'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE

Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.

Traded off- '97 3500 C/C, 4x4, CTD

'92 W250, LE, CC, CTD w/ tweaked pump (SOLD)


"Obama = Hoax and Chains"

If Obama is the answer, it must have been a stupid question.
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