cutting out/bucking
#1
cutting out/bucking
My 98 24 valve is bucking/cutting out under a load. I have replaced the crankshaft sensor the lift pump and the injector pump and it is still acting up. It is like it dies for a millisecond then goes again. The fuel is just shutting off. It is showing no codes either. Any ideas? I already have about $1500 in parts and still no truck. I was wondering if there is a cam sensor on this year model and if that might be the problem. It is stock no upgrades at all and has the 5 speed manual tranny. About 225k miles. I am pretty disgusted with the fact that i put the new ip on it and its still crappin out. Please help
Last edited by Diesel Drivin Gal; 09-14-2011 at 10:32 AM.
#2
Diesel Bomber
iTrader: (1)
No codes with a scanner?
Have you done a APPS(TPS) reset?
Any time the batteries are disconnected, batteries ran dead, ECM disconnected, APPS disconnected, APPS replaced the APPS calibration procedure MUST be done again to reset the APPS idle and WOT limits. If the calibration is not done error codes and other issues must occur
It could be the APPS itself they do wear out in time.
What is the fuel pressure?
Have you done a APPS(TPS) reset?
Any time the batteries are disconnected, batteries ran dead, ECM disconnected, APPS disconnected, APPS replaced the APPS calibration procedure MUST be done again to reset the APPS idle and WOT limits. If the calibration is not done error codes and other issues must occur
It could be the APPS itself they do wear out in time.
What is the fuel pressure?
#4
What Turbo20psi said.... APPS. If it goes long enough like that you will get the dead pedal very similar to vp going out. I will find you the link I always post for people..................
---AutoMerged DoublePost---
APPS Reset procedure - Dodge Cummins Diesel Forum
Somebody needs to post the procedure on this forum and make it a sticky
---AutoMerged DoublePost---
APPS Reset procedure - Dodge Cummins Diesel Forum
Somebody needs to post the procedure on this forum and make it a sticky
Last edited by empty wallet; 09-14-2011 at 05:19 PM. Reason: Automerged Doublepost
#5
I changed the fuel filter first, it was clean but changed it anyway. The fuel pressure at idle is 14psi, i do not have a gauge inside the truck yet. Gotta find one asap. No codes with scanner, have not tried to reset apps will try that tonight. the apps was reading 69% at full throttle. Sounds like that is next step. Thanks Will update as soon as i try it.
#6
#8
Diesel Bomber
iTrader: (1)
Testing
1.Ensure ignition is off. Disconnect APPS connector. APPS is located on bracket, just above fuel injection pump. Start engine and allow engine to idle. Using DVOM, measure voltage at terminal No. 5 (Dark Blue/White wire) on APPS connector. If voltage is more than 5.5 volts, go to next step. If voltage is 5.5 volts or less, go to step 3 .
2.Shut engine off. Turn ignition on with engine off. Using DVOM, measure voltage at terminal No. 5 (Dark Blue/White wire) on APPS connector again. If voltage is more than 5.5 volts, repair short to voltage on Dark Blue/White wire between APPS and ECM when ignition is on. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. If voltage is 5.5 volts or less, repair short to voltage on Dark Blue/White wire between APPS and ECM when engine is running.
3.Shut engine off. Ensure ignition is off and APPS connector is still disconnected. Using DVOM, measure resistance between ground and terminal No. 4 (Black/Yellow wire) on APPS connector. If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, replace APPS.
4.Start engine and allow engine to idle. Shut engine off. Turn ignition on with engine off. Using DVOM, measure voltage at terminal No. 2 (Light Green/Dark Blue wire) on APPS connector. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, repair short to voltage on Light Green/Dark Blue wire between APPS and ECM. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector.
5.Turn ignition off. Disconnect ECM connector. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. Using DVOM, measure resistance between terminal No. 4 (Black/Yellow wire) on APPS connector and terminal No. 32 (Black/Yellow wire) on ECM connector. If resistance is 5 ohms or more, repair open in Black/Yellow wire between APPS and ECM. If resistance is less than 5 ohms, replace ECM.
Number 3 is important.
1.Ensure ignition is off. Disconnect APPS connector. APPS is located on bracket, just above fuel injection pump. Start engine and allow engine to idle. Using DVOM, measure voltage at terminal No. 5 (Dark Blue/White wire) on APPS connector. If voltage is more than 5.5 volts, go to next step. If voltage is 5.5 volts or less, go to step 3 .
2.Shut engine off. Turn ignition on with engine off. Using DVOM, measure voltage at terminal No. 5 (Dark Blue/White wire) on APPS connector again. If voltage is more than 5.5 volts, repair short to voltage on Dark Blue/White wire between APPS and ECM when ignition is on. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. If voltage is 5.5 volts or less, repair short to voltage on Dark Blue/White wire between APPS and ECM when engine is running.
3.Shut engine off. Ensure ignition is off and APPS connector is still disconnected. Using DVOM, measure resistance between ground and terminal No. 4 (Black/Yellow wire) on APPS connector. If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, replace APPS.
4.Start engine and allow engine to idle. Shut engine off. Turn ignition on with engine off. Using DVOM, measure voltage at terminal No. 2 (Light Green/Dark Blue wire) on APPS connector. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, repair short to voltage on Light Green/Dark Blue wire between APPS and ECM. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector.
5.Turn ignition off. Disconnect ECM connector. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. Using DVOM, measure resistance between terminal No. 4 (Black/Yellow wire) on APPS connector and terminal No. 32 (Black/Yellow wire) on ECM connector. If resistance is 5 ohms or more, repair open in Black/Yellow wire between APPS and ECM. If resistance is less than 5 ohms, replace ECM.
Number 3 is important.
#9