idle quality

[rsh4364]

Just finished spin on fuel filter upgrade,turned out nice, but M1009 still idles kinda rough,whats next step?Starts better, runs better,but still sounds like a diesel with a big cam at idle..

 

[Skinny]

Idle speed set too low? Are your Gen lights coming on? This will happen if you rpms drop too low. If this is not the case, you probably have a fuel delivery/IP issue.

 

[rsh4364]

Idle speed seems right,gen. lights work correctly.might throw on an electric pump and see if that helps.One other thing I have noticed is when truck sits for 12 or more hours and I go to start it if I crank over for 5-10 seconds then glowplug it,it starts right up..odometer is at 77,200 miles,I drive her 3-500 miles per week and love it.Thanks for the input Skinny,Im hoping its lift pump not IP yet !

 

[Barrman]

If you have to crank more than about 1-2 seconds hot or cold. You have a fuel delivery issue building. Pull the check valve in the return system on top of the IP and see if the little glass ball has caught a bunch of IP parts in it. Start thinking IP replacement though.

My first M1009 had a big cam gasser non rythmic idle. No trash in the return line, fast starts and great mpgs. I replaced the IP and have a smooth as glass idle, faster starts and just below 20 mpg's now that I am using the new found power. Well, not really new found since it has almost been two years but you get the point.

 

[rsh4364]

When its warm it starts in an instant,better than any gas vehicle,will look at check valve though,seems like it started doing this off and on after I ran her out of fuel..

 

[MarcusOReallyus]

You might have gunked things up with garbage from the bottom of the tank.

 

[rsh4364]

I hope that's it,gf gonna kill me if I have to spend money on a IP,just spent 1500$ on a trans. for my other old vehicle....