4-4500 RPM sync loss- Already changed cap and diode

jcbe34 · Post by **jcbe34** » Aug 16, 2011 9:41 PM

So, to make a long story short, I've been battling sync loss ever since I installed megasquirt. At first it was multiple sporadic hiccups at high RPM's.. I tried messing with the noise filters, adding a 10k inline resistor (changed it but didn't fix it), and most recently changed out c32/C31 .001uF capacitor/D24 1n4148 diode.. Now my sync loss is severe, won't rev past 4500 or so. I am still quite green when it comes to megasquirt, so I'm really just looking for some suggestions, where should I be looking? My megasquirt is inside a stock motronic box and the wiring is not shielded from M55 to DB37.. Should I start there?

datalog-
http://www.2shared.com/file/S2h2_nOF/20 ... 04633.html

.msq
http://www.2shared.com/file/30AnVcUR/1st_save_8-16.html

I took a tooth log also, don't know how to post it though

marc79euro645 · Post by **marc79euro645** » Aug 16, 2011 10:20 PM

I went through the same thing with mine.I tried new shielded wire on the vr sender. The final fix was a different dizzy with a better vr signal.
good luck
marc

jcbe34 · Post by **jcbe34** » Aug 17, 2011 5:46 PM

Hmm.. Never heard of that, but I suppose it makes sense. When I came home from work today I changed the crank sensor over to another one I had with a 10k resistor wired in, and now the car revs all the way to 7 but still misfires pretty good at and above 5k. I don't have time to log it right now but it will be interesting to see what the tooth log looks like now, would it help if I posted a screen shot or two of the tooth log, or is there another way to post it?

mooseheadm5 · Post by **mooseheadm5** » Aug 17, 2011 5:52 PM

What are you using for a pickup and wheel?

jcbe34 · Post by **jcbe34** » Aug 17, 2011 5:57 PM

stock 60-2 wheel and sensor from a b35.. I've read about the problems with this setup, but I've tried all of the solutions that I've seen.

Xenocide · Post by **Xenocide** » Aug 17, 2011 10:10 PM

Have you tuned the pots on the board? I'm not sure I'll be much help looking at the log, but if you'd like I can host it. Just email it to me if you'd like. walter.pamplin (at) gmail.com

mooseheadm5 · Post by **mooseheadm5** » Aug 17, 2011 10:21 PM

The e2-535i uploader can host MS files and pictures

jcbe34 · Post by **jcbe34** » Aug 17, 2011 10:50 PM

Xenocide wrote:Have you tuned the pots on the board? I'm not sure I'll be much help looking at the log, but if you'd like I can host it. Just email it to me if you'd like. walter.pamplin (at) gmail.com

No thats what I was going to ask about.. I think that might be my next move

MyE28.com

MyE28.com

4-4500 RPM sync loss- Already changed cap and diode

4-4500 RPM sync loss- Already changed cap and diode