MicroSquirt.com read only forum (Jan.15,2018)

It was worth a lot more than three!!!

The dragster has never run right when it came to starting, throttle response and idling but out on the track it was a different story. The intermittent stalling and 4000 rpm ceiling made it tough to be competitive when the car would stall while staging and then ...

In looking at the code I believe I see something that mgiht explain a lot. The pulse tolerance used in VR sensor checking is changed after warmup. So this probably the explanation for the change in trigger+/- behavior as soon as warmup temperature was reached. Try setting this tolerance the same as ...

Worked on this all week. Still can't get it to run right. I'm at my wits end. Anybody have an idea why I can't spin past 4000 rpm until the WUE is done?

You were right about setting the ECU type and downloading the .msq file. That was what I did to fix that problem. Unconsciously of course...

As for not wanting to rev past 5000 rpm, the datalog below shows that it actually does not want to rev past 4000 (5000 was an estimate) and it does seem to be ...

The correct .ini is loaded. The problem with the engine not revving past 5000 or so does go away on its own after the motor has been running for 20-30 seconds but it is not WUE related. Cold motor or hot, WUE on or off, it acts the same.

I have other issues that may or may not be related. Last year ...

Not sure what I did but it is working again. Just like it was before. Which is to say that it still will not rev past 5000 rpm or so. I was excited about moving up to 2.89 when I read that this problem was addressed in the new code but apparently something is still not right with my setup. I have ...

I just moved up from 2.87 to 2.89 and now my uS is not functioning properly. When I power up, it only cycles the fuel pump on and off every few seconds. The tach in MegaTune while this is going on bounces from 0 to 8000 and back. The car refuses to start. What have I fried?

The bounce that I'm seeing is in the AE area. I have seen a rate of change from -50 to 80 kpa with uS powered up and the engine shut off. Same results even with the MAP disconnected from uS. Setting the lag time down to 10 has masked the problem and at least allows the car to idle but throttle ...

Ok, here's the latest. I've tried your segguestions (thanks!) but nothing changed. I did notice that the reading from the MAP sensor will float widly even with the engine shut off. In fact, even with uS disconnected from the MAP sensor. While the engine is running, the "dancing MAP will trigger the ...

When the motor dies, the seconds are still counting so it would seem the theory about the ignition reset is true.

In order to minimize the possibility of electronic noise, I mounted uS about 6' away from the MSD box. The MSD is mounted in such a way that the primary and secondary wiring is as short ...