cruising hesitation Options

[brant]

But he also s water cooled so the motor rpm’s are not important for cooling

[rjames]

True, but it's lugging the engine quite a bit if he's cruising at 2K RPM which would increase temps. Should still be 3K or over. Any increase in throttle at 2k RPMs while doing 50 MPH would induce some hesitation.

[prrt1]

I know cutting wires is not a good idea. It is one of the two wires feeding the comb contacts in the TPS (wire 9 in my BMW) so it’s half of the “accelerator pump” now out of the circuit. The huge problem of severe bucking ( occurring when upshifting between 1st and 2nd) and the minor hiccups when cruising (that’s about 2-2.5K rpm) have both disappeared with the wire cut. Very little decrease in acceleration ability. I know it’s weird, but it works. I’ve tried adjusting the TPS (new PC board) per D-jetronic and that didn’t work. I figure most of the info the ECU needs to know about fueling the engine is coming from the MAP, the TPS is sort of a fine-tune, and the cut wire may be eroding my fuel mileage, but that isn’t a real concern. After a couple hundred miles or sooner I’ll pull the plugs and check for mixture problems.