Yet another Hesitation Surging Question..

[roger 04 rt]

 

The engine looks very hot with the oil at 245 degrees F. Is that usual? I noticed the air temp is in the 90s.

 

No, I can't say that it's usual, but I'm in the high desert and it was 90 degrees outside at 8pm when the reading was taken. I had also stopped in a parking lot and was revving the engine to see if it was stalling under load or just stalling at a throttle position.

 

When you let off the throttle at spreadsheet line 84 the RPM is 500. Did it almost stall.

Yes. That's what happens when I'm either standing still or riding.

 

Throttle position sensor going bad, along with a bad O2 sensor? I've been stranded (read: camping ) while waiting for various parts and fixes to come in. In a different thread I'm also replacing the HES.

 

Looking at the data I don't see any signs that the O2 or TPS is bad. As lee pointed out ther is a big rpm anomaly. When I have seen things like that it has been a connection failure. Maybe that what an HES insulation breakdown leads to.