light load surge finally nailed

[rb3221]

What reading should you when you test a TRE with a meter.

Ran the motor up to 2000 rpm's and pulled the clutch and the revs dropped when the clutch is pulled.

To be honest, I use a 10c resistor (5.6k ohms) to do the job. I would "assume" the resistance of the tre would be the same (5th gear gps resistance).

It sounds like yours is working ok thou.

Leonard.

Thanks Leonard, I thought it was working also.

Rb I think your chasing the prob in the wrong area.......... from info you have given symptons are more prone to be occuring at light throttle settings which to me is indicating fuel delivery or mapping fault.
Odds on it's running to lean at light throttle and the motor is "hunting" which is creating the surge effect.
Also check TPS setting (with a volt meter)
Just my .0000001 cents worth

fasterfaster,

I though that too after the last one I had do this, but I have gone through the map as well as remapped even took it for a run and logged O2 and checked it and all seamed right. The only reason I though it maybe electrical was that it started a few month ago with a very mild serge when he was riding around town (under 60k's) but nothing on the highway then it stopped. 2 weeks ago just as he was going for a ride it came back this time it was in every gear around town and on the highway at any speed. So the first thing I did was check all the common things, then I checked TPS (but I did not check it with a volt meter), fuel pump pressure, fuel lines, injectors, all the sensors and even pulled out the pink wire. The only thing I could find was when I put an ohm meter over the GPS I get no readings at all.