jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Did anyone else notice the 6ms Crank Dwell and 4ms Run Dwell settings? Isn't that way too high? I've never ever touched the dwell settings...let's hope this is the problem... Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 29, 2010 Share Posted January 29, 2010 Did anyone else notice the 6ms Crank Dwell and 4ms Run Dwell settings? Isn't that way too high?6ms for cranking is what I use so don't think that's the issue here. 4 ms fixed would be a problem for very high revs (7k rpm) as there isn't enough time, but I again I don't think that's the problem here. Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 29, 2010 Share Posted January 29, 2010 I used 4.0ms Run Dwell once and fried a VB921 to the point that the chip actually cracked. Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 29, 2010 Share Posted January 29, 2010 Just humor me here and reflash the firmware and burn the MSQ back to the chip again. I've had a ghost issue before that turned out to be a freak firmware corruption. Reflashing fixed it. Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 29, 2010 Share Posted January 29, 2010 Okay, so pull to wire from the distributor to the coil off on the coil side, and while someone cranks, slowly plug it back in and the spark should jump and i'll be able to see this? I guess I'm not sure which "post" you're referring to.I'm saying you should pull the plug wire off at the coil, have someone else crank the car, and then slowly bring the plug wire back to the coil as if you were going to re-insert it. Stop just short so you can still see the gap and look for a spark. Best to do inside a garage if you can. It should be a nice bright spark. If you find you have a spark then the next step is to use a timing light while someone else cranks it to get the timing set close. I suspect the timing is too far enough off for the engine to start. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 So keep the dwell where it's at, or optimize it? I hope I didn't fry my coil... Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 29, 2010 Share Posted January 29, 2010 I doubt you fried the coil, but I would back that Run Dwell down to 3.0 to be safe when it does finally fire up. Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 29, 2010 Share Posted January 29, 2010 I doubt you fried the coil, but I would back that Run Dwell down to 3.0 to be safe when it does finally fire up. Agreed, I run with a max of 3.2 ms. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Okay, so back down the run dwell to 3.2 and do the coil test. I'll do these thongs and get back to you guys. I did confirm the timing was spot on before my spark decided to take a dump on me. So if there is a spark when I put that coil wire on but then no spark on the plugs...then what? Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 29, 2010 Share Posted January 29, 2010 So if there is a spark when I put that coil wore on but then no spark on the plugs...then what?That's unlikely, unless you forgot to put the rotor in Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Okay I know that's not the case! Ha ha, alright, well hopefully I get a spark Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 29, 2010 Share Posted January 29, 2010 If you have spark at the coil, but none (or random) spark at the plugs I would start checking your cap, rotor button, plugs and plug wires. Another thing I just thought of, so you have a chassis ground strap to the engine? On the Z it's typically an extension of the negative battery cable that runs to a starter bolt. I've seen several where that negative cable gets replaced with a non OEM and they fail to connect any kind of chassis ground to the engine causing massive EFI and ignition grounding issues. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Yes we do, I need to double check it though, that's another thing I will do when I get home. As far as the cap and rotor and such, how do I go about checking these things? Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 29, 2010 Share Posted January 29, 2010 Check the terminal inside the cap for excessive wear or corrosion. Check the contact end of the rotor for the same. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Okay, thanks again! Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Here is something to note....R9 on my stim board is EXTREMELY hot, I just burnt myself!! Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Ok, so here is a little test I did. I used the timing light and put it on the wire from the coil to the distributor. Here it is: http://s617.photobucket.com/albums/tt260/jacob80a/?action=view¤t=102_8628.flv I'm thinking its my VB921....I've ordered the bosch upgrade. What do you guys think?? Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Here is a video awhile ago when it was untuned and before I changed head gasket: http://s617.photobucket.com/albums/tt260/jacob80a/?action=view¤t=102_7842.flv Gosh I miss this Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 29, 2010 Author Share Posted January 29, 2010 Here are photos of my board, doesn't appear that anything is fried, does it?? Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 30, 2010 Author Share Posted January 30, 2010 I'm definitly leaning toward the possibility of a bad VB921 at this point..... Quote Link to comment Share on other sites More sharing options...
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