crazy rpms

rsnall · 12-14-2007, 09:28 AM

i just installed a fass 150 along with super b turbo and ats 2 piece manifold. when im just setting in park i can gradually increase rpms and they jump around alot especially when i let off. they jump down in increments. anyone know what this might be. i had a predator programer on it so i took it off and it doesnt do it as bad. i also i have a small leak where the fuel line goes to the pump on the motor. is this caused by the other line just being there?

thanks for the help!

**Diesel-Dan** · 12-17-2007, 07:37 AM

Quote:

Originally Posted by rsnall

i just installed a fass 150 along with super b turbo and ats 2 piece manifold. when im just setting in park i can gradually increase rpms and they jump around alot especially when i let off. they jump down in increments. anyone know what this might be. i had a predator programer on it so i took it off and it doesnt do it as bad. i also i have a small leak where the fuel line goes to the pump on the motor. is this caused by the other line just being there?

thanks for the help!

You talking about Fuel pressure of your RPM's?

__________________
Dan MacDonald
www.FASSRide.com

2001 2500, 4x4, Con OFEed, TBK, AFE Stage II kit W/ prefilter and 4" cowl mod. , FASS 150/150, Mach 2's, Drag Comp,

Currently running on B-100
'02 Jetta TDI 5 Speed "Mini Me" 45-50 MPG

rsnall · 12-18-2007, 05:40 AM

im talkin about my rpms

**Diesel-Dan** · 12-18-2007, 08:15 AM

OK....well talking from our FASS system side of things...get me a fuel pressure of our system. I don't see how we could cause a RPM fluctuation unless our system is just not getting fuel to the CP3. Check for codes...im sure if its something that the ECM controls that is messing up, there would be a code stored.

On the fitting on the CP3 on the Engine, check to see if its tight. ALSO check to see if you didnt pinch the o-ring on the install.

__________________
Dan MacDonald
www.FASSRide.com

2001 2500, 4x4, Con OFEed, TBK, AFE Stage II kit W/ prefilter and 4" cowl mod. , FASS 150/150, Mach 2's, Drag Comp,

Currently running on B-100
'02 Jetta TDI 5 Speed "Mini Me" 45-50 MPG

rsnall · 12-18-2007, 12:10 PM

ok ill check all of that.
thanks for the info!

12-14-2007, 09:28 AM	#1 (permalink)
rsnall Cummins Fanatic Join Date: Sep 2007 Posts: 108 rsnall's Truck Pics	crazy rpms i just installed a fass 150 along with super b turbo and ats 2 piece manifold. when im just setting in park i can gradually increase rpms and they jump around alot especially when i let off. they jump down in increments. anyone know what this might be. i had a predator programer on it so i took it off and it doesnt do it as bad. i also i have a small leak where the fuel line goes to the pump on the motor. is this caused by the other line just being there? thanks for the help!

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12-18-2007, 05:40 AM	#3 (permalink)
rsnall Cummins Fanatic Join Date: Sep 2007 Posts: 108 rsnall's Truck Pics	im talkin about my rpms

12-18-2007, 08:15 AM	#4 (permalink)
Diesel-Dan FASS Tech Dept. Join Date: Dec 2005 Location: Marthasville, MO Posts: 985 Diesel-Dan's Truck Pics	OK....well talking from our FASS system side of things...get me a fuel pressure of our system. I don't see how we could cause a RPM fluctuation unless our system is just not getting fuel to the CP3. Check for codes...im sure if its something that the ECM controls that is messing up, there would be a code stored. On the fitting on the CP3 on the Engine, check to see if its tight. ALSO check to see if you didnt pinch the o-ring on the install. __________________ Dan MacDonald www.FASSRide.com 2001 2500, 4x4, Con OFEed, TBK, AFE Stage II kit W/ prefilter and 4" cowl mod. , FASS 150/150, Mach 2's, Drag Comp, Currently running on B-100 '02 Jetta TDI 5 Speed "Mini Me" 45-50 MPG

12-18-2007, 12:10 PM	#5 (permalink)
rsnall Cummins Fanatic Join Date: Sep 2007 Posts: 108 rsnall's Truck Pics	ok ill check all of that. thanks for the info!