So, I've been making slow progress and tuning one tiny step at a time but I'm still getting triggering issues at ~3200 RPM or so.
After doing a lot of diagnostics, miscellaneous troubleshooting, rewiring, and even a little timing adjustment (to semi-rule out 'horrible timing' as the culprit), I'm pretty much still at square 1.
Yesterday I searched the internet for "VEMS, Trigger error at 3000" or something like that and many results came back that started me wondering if I'm experiencing what has been discussed and resolved sometime back.
Here is my symptom:
The car starts and accelerates relatively well, until almost exactly 3200 and then I get trigger errors and an ECU reset (indicated by afterstart, warmup etc. lights coming on).
I reproduce this issue as follows:
Turn out onto a 1/2 mile stretch of road
Accelerate at slow to medium speed in 1st until the trigger error at 3200 --> trailer hitch, bounce, shudder, hesitation and whatever else you'd like to call it
Repeat in 2nd gear
Repeat in 3rd gear, but more gingerly since I'm approaching 3200 already, and I usually shift early or brace for backfire (tailgaters love this next part :-D)
Shift into 4th. If I trig error-ed in 3rd, I expect a large backfire, but if not I accelerate nice, very slow and steady to about 3400 or maybe even 3500 and then pull back into my neighborhood.
I've done this probably 30 times in the last few weeks, and the results are almost exactly the same every time.
The reading I've done seems to suggest some possibilities, but this information is quite old, and the threads suggest that a few small changes would solve it. This made me think they were likely to already be implemented in the system(?):
A) secondary (Hall) window and Primary (VR) "Zero" trigger Not being close enough (I'm pretty sure mine a
many teeth apart)
B) Not having an "inverter" (I bought the system directly from the VEMS website; never thought to look for a pre configured one)
C) Not wired correctly, so that the VR is triggering backward (I'm not certain about this, but I have moved the primary trigger wires around many times and tested with no success)
I have tested my sensors on an oscilloscope, and they seem to trigger nice and steady, but I have not yet gotten around to testing "at" the EC36 connector.
Can someone comment on the likelihood of A, B or C being my issue, and if not -What might I be missing?
My VEMS was purchased new from the "factory" not too long ago, and I'm also using current firmware.
Thanks for any help, I have been trying to get this car on the road for soo long!