hello all, im having some issues with my 96 cummins, yesterday i drove it about 10 miles to some see some family, on my way home someone pulled out in front of me and when i let out of the throttle the truck stalled, got out and checked to see if the shutoff was the culprit, but it was working fine, got back in pushed the pedal down about 1/8 inch she started and ran, but as soon as i let out of it she stalled again, same issue all the way home about 10 miles, as long as i keep the pedal down just a little bit it will run, what can cause this? the day before it would regularly hold about 700 rpm on the dash when warmed up, and about 500 when cold (20 degrees outside),

 

Your idle screw is not set correctly.... 850 in gear with a\c on ... 900/925 idle

 

how do you adjust that? and they can just drop off without warning?

 

Back of IP ... 10mm wrench .... Its kinda hidden ... But it's there

and yes they can back off once the jam nut comes loose

 

I have to adjust mine twice a year just from the seasonal temperature changes.

850/900? Really? That seems really freaking high. Mine idles at 800 in neutral, and everyone is always asking me why my engine is racing.

 

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...and here's the low idle adjustment screw on the back of the pump:

 

im guessing turning it out raises the idle?

 

Depends on which direction you turn it.

Mine idles just under 750 in Drive, IMO it's perfect.

 

Ahh ... I was close ... Mine idles @ 900 in gear ...

 

Then shutting it off sounds about as healthy as stopping a bicycle by tossing a stick in the spokes.