black smoke idling and pumping pedal
OEM1984CJ7
Jeeper
I did the 2100 swap and TFI upgrade and just now noticing that when idling I can pump the gas pedal several times rapidly and blow black smoke out the pipe. Engine will almost die but doesn't and puffs pretty good. Once you rev it a couple of times and idle it over about 1200 rpms it clears up. It runs great while driving and revs great under normal conditions, but if you just pump the pedal you get black smoke. It is on a AMC 258 i6 / 4.2l and manual choke. I check the choke cable to see if it slipped and it is all the way off and engine is normal operating temp. Trying to figure out an accurate way to figure mileage also as these gauges are pretty sloppy. Maybe an inline fuel flow meter and measure after driving 50 miles or so.
any ideas? I don't want to start messing with the adjustments screws just trying to see if anyone knows what would cause this.
thanks.
any ideas? I don't want to start messing with the adjustments screws just trying to see if anyone knows what would cause this.
thanks.