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Old 06-08-2010, 04:12 PM   #21
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Doppelganger, I should add that, despite the error code, there was nothing wrong with the cam angle sensor, after fixing the wiring for the crank angle sensor I put the original cam angle sensor back in just to see, it has not thrown an error or acted up at all. The entire issue was the wiring for the crank sensor.

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Old 06-08-2010, 04:15 PM   #22
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Originally Posted by steelrat View Post
01+ head gasket changes how everything flows to 3&4.... as a result with just the regular old coolant re-route, the #1 cylinder gets hot the same way the #4 does normally.
install a on/off valve ether before or after your heater core so you can stop hot water from flowing back to the block at the track.
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Old 06-08-2010, 04:23 PM   #23
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Originally Posted by Doppelgänger View Post
Jay- I've run up to .040" gap before and found .042"+ started getting misfires. So I've been running .035 for awhile with no issues. But why would plug gap cause a steady decline in performance after x:xx time..multiple times?
Coils are wear items and degrade over time. .035 gap is on the higher side. Plus gap should be set with a feeler gauge or a real plug gap tool. Eyeball won't tell you if you are a couple of thou off--and a couple of thou could be the difference between getting a good spark or not.

Since you have an aftermarket ECU, it would be simple to replace the OEM coils with better coil on plugs or coil near plugs.
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Old 06-08-2010, 04:25 PM   #24
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Originally Posted by Doppelgänger View Post
Jay- I've run up to .040" gap before and found .042"+ started getting misfires. So I've been running .035 for awhile with no issues. But why would plug gap cause a steady decline in performance after x:xx time..multiple times?
I wish I knew an exact cause/explanation, but I can only guess. I still think that's too much gap even at .035, but that's just my opinion and goes against what most people on this forum believe. Good luck with this and I hope you don't end up wasting money on sensors like I did.
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Old 06-08-2010, 11:42 PM   #25
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Quote:
Originally Posted by Ben View Post
Coils are wear items and degrade over time. .035 gap is on the higher side. Plus gap should be set with a feeler gauge or a real plug gap tool. Eyeball won't tell you if you are a couple of thou off--and a couple of thou could be the difference between getting a good spark or not.

Since you have an aftermarket ECU, it would be simple to replace the OEM coils with better coil on plugs or coil near plugs.
Are you guys at DIY ever going to make a "kit" for retards like myself who are afraid to build my own set-up?
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Old 06-10-2010, 08:18 AM   #26
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After speaking to a few other people, it seems like it might be the coils indeed. I guess pushing them pretty hard for so long and getting them extra hot at the track causes them to degrade. Unfortunately since it's not something that happens on the street (or hasn't yet) getting another set of coils won't be in vain. A full COPS setup would be nice, but budget is only going to allow me OE replacement coils for now.
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Old 06-10-2010, 01:36 PM   #27
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Originally Posted by Doppelgänger View Post
You know, come to think of it, I've heard from other people having issues with cam sensors on 01+ cars when they get particularly hot since it's right on the side of the valve cover. Dunno if those sensors just die or degrade though...but I wouldn't mind taking a look at both the cam can crank sensors.
I had similar behavior on my 99 (Adaptronic, COPs) that drove me absolutely nuts trying to figure it out. Long story short the problem was the crank sensor. When it heated up, it would begin screwing up the pulse signal to the ECU. It makes the pulse width much too long, like it is 'sticking'. The ECU trigger uses falling edge so effectively it grossly retards the timing. Same thing happened to someone else on m.n and the cure was replacing the crank sensor. I fixed the problem temporarily by switching the crank trigger from 'falling edge' to 'rising edge' in the ECU. Not sure if you can do that. I have since replaced the crank sensor.

May not be your problem but it is worth investigating. Long thread about it here, with some links to other good discussions.
https://www.miataturbo.net/showthrea...ght=adaptronic
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Old 06-10-2010, 01:42 PM   #28
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Are you guys at DIY ever going to make a "kit" for retards like myself who are afraid to build my own set-up?
Fleaforea and I have been asking for one for a while.
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