IH8MUD™ Forums - View Single Post - does the 80 shut down injection while coasting?

Hants · 05-21-08, 10:47 AM

There is a fuel cutoff relay that stops fuel (most times) when you release the throttle.

I don't know the details of how it works.

On my rig, it shuts down most(all?) of the fuel when I let off the gas. ScanGauge goes to 9999 MPG. Sometimes, it doesn't, though (ScanGauge goes high, but not to 9999). I haven't figured out any pattern.

Some new vehicles variably shut down individual cylinders when full engine output isn't needed (low-load cruising down the highway). Said to be unnoticeable (except at the gas pump).

05-21-08, 10:47 AM	#3
Hants Dumbass rookie dough-head Join Date: Feb 2004 Location: Behind the bar TLCA# 13790 Posts: 407	There is a fuel cutoff relay that stops fuel (most times) when you release the throttle. I don't know the details of how it works. On my rig, it shuts down most(all?) of the fuel when I let off the gas. ScanGauge goes to 9999 MPG. Sometimes, it doesn't, though (ScanGauge goes high, but not to 9999). I haven't figured out any pattern. Some new vehicles variably shut down individual cylinders when full engine output isn't needed (low-load cruising down the highway). Said to be unnoticeable (except at the gas pump). __________________ 1997 LX450, 132K, Lockers, LEDs, Nak-o-matic mic holder, CDL w/ Pin 7, 285/75R16 BFG AT, Tool Sleeve, Slee armor, Slee speedo gear, OME 2.5" Heavy, Prophylactic HG, Line-X in place of LX trim KD0CXL "You don't get to vote on the way it is... you already did!" But you do get to vote on the way it will be. "... but you have to compare it to the current political process where idiots elect liars to transfer wealth to crooks." -- Scott Adams "Damn you, Hants White!" -- Dan-The-Man