GTOdave

My 98 cam only ws6 is shutting off like a diesel truck..dont know why..maybe its in the tune or timing..was wondering if anyone else was having the same problem, or have heard of this before.

01SS99red

iTrader: (6)

what do you mean like a diesel? Like a cummins engine?

LS1MCSS

iTrader: (18)

Probably more like a Power Stroke,,

GTOdave

like any diesel shuts off, the rpms slowly come to a stop instead of stopping immediately..

$750 L98

iTrader: (7)

It's called "dieseling", it's caused by detonation after the motor is shut off..leaky injectors? Running lean, turning the spark plugs into a glow plug when you try to shut down? Do you get any knock or pre-det while it is running? Does it run hot or overheat?

GTOdave

well its running rich from the last tune, but its a cam only car and it runs fine. just shuts off like a diesel, could it be in the tune?

RedHotG8

iTrader: (1)

If it's running rich there's too much fuel in the combustion chamber causing engine run-on. Get your tune dialed in and it should stop.

eseibel67

iTrader: (10)

You need fuel in order for an engine to run on, so the injectors must be leaking. Combined with hots spots of carbon on the pistons lighting up the fuel.

In the old days, this was a common problem because the fuel would keep on pumping and being sucked out of the carb. I had an old POS that used to run on, if it got hot enough, for about 30 seconds after I turned off the ignition. Funny as hell.

GTOdave

yea i think its in the tune bc the car runs very rich..

99firehawk

iTrader: (1)

Might not hurt to seafoam the engine to help clean carbon and gunk that might be igniting...
Do you run a catch can or filter out the pcv oil blow by?

GTOdave

ive seafoamed her about 2 times the past 4 months,and no i dont