crazy rpms

rsnall · 12-14-2007, 08:28 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, 06:37 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?

rsnall · 12-18-2007, 04:40 AM

im talkin about my rpms

Diesel-Dan · 12-18-2007, 07:15 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.

rsnall · 12-18-2007, 11:10 AM

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

12-14-2007, 08:28 AM	#1 (permalink)
rsnall Cummins Fan Join Date: Sep 2007 Posts: 64 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, 04:40 AM	#3 (permalink)
rsnall Cummins Fan Join Date: Sep 2007 Posts: 64 rsnall's Truck Pics	im talkin about my rpms

12-18-2007, 07:15 AM	#4 (permalink)
Diesel-Dan Diesel Freak Join Date: Dec 2005 Location: Marthasville, MO Posts: 965 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.

12-18-2007, 11:10 AM	#5 (permalink)
rsnall Cummins Fan Join Date: Sep 2007 Posts: 64 rsnall's Truck Pics	ok ill check all of that. thanks for the info!