mS on 2004
08-13-2006, 04:47 PM
#81
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Update: The optical CAS is crap. I couldn't get an RPM signal from it no matter what. Tried my luck with the spare magnetic CAS I had, and guess what: RPM! I removed the optical CAS from my engine today and I'll be fitting the magnetic tomorrow. Stay tuned folks, its almost there!
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08-14-2006, 02:22 PM
#82
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Originally Posted by Reverant
Update: The optical CAS is crap. I couldn't get an RPM signal from it no matter what. Tried my luck with the spare magnetic CAS I had, and guess what: RPM! I removed the optical CAS from my engine today and I'll be fitting the magnetic tomorrow. Stay tuned folks, its almost there!
Glad you've solved the issue though, nice one! I'm dreading when I run into problems!
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08-14-2006, 04:39 PM
#83
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Originally Posted by richyvrlimited
Optical CAS's are from early miata/Roadster/MX5's weren't they?
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08-14-2006, 04:57 PM
#84
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I'd just say that there is something wrong with the optical CAS.
My old optical CAS from the 1.6 works just fine on my 99 engine.
Oh, and it doesn't matter at all which cam the CAS runs from as they both run from the same timing belt. The factory changed the positioning of the CAS when they introduced the 1.8 as they moved it from the intake cam to the exhaust cam. No big deal and certainly nothing 'un-natural' about it.
My old optical CAS from the 1.6 works just fine on my 99 engine.
Oh, and it doesn't matter at all which cam the CAS runs from as they both run from the same timing belt. The factory changed the positioning of the CAS when they introduced the 1.8 as they moved it from the intake cam to the exhaust cam. No big deal and certainly nothing 'un-natural' about it.
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08-14-2006, 06:31 PM
#85
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The exhaust side cam may be a bit hotter (not really) and the optical unit may not like the extra heat (not likely), but anywho, it works so...
Did I say that I installed it today and I have RPM?
Now all I need to do is find a decent location for my external MAP sensor:
Did I say that I installed it today and I have RPM?
Now all I need to do is find a decent location for my external MAP sensor:
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08-14-2006, 09:50 PM
#88
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Originally Posted by kingofl337
More troubles....maybe. I was installing a megasquirt on a 97 Jeep Wrangler and the check engine light comes on and the OEM ECU shuts down when the injectors are disconnected. Reverant you may need to get some resistors to fool the ECU into thinking the injectors are still connected. It appears most ODB-II cars check for the injectors.
My 96 OBDII Miata didn`t care if the injectors were connected or not when I was running MS. No CEL what so ever.
Dumb PC.... to our benefits of course
REALLY nice setup you have there reverant!!!
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08-15-2006, 05:22 AM
#89
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Originally Posted by saboteur
Wires would be easier to run than a vac line
Originally Posted by saboteur
Can always re-use the onboard MAP as a baro correction one.
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08-15-2006, 04:36 PM
#91
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Originally Posted by Reverant
Right on the money there! Just two more wires (+5Vref, signal - ground is common with the CAS) and you save yourself from routing vaccum hoses through the engine bay and the firewall.
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08-15-2006, 05:03 PM
#93
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Originally Posted by richyvrlimited
Why's routing 2 wires easier than routing one vac line? they all have to go from the engine to the MS don't they?
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08-17-2006, 07:22 AM
#96
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Update: I found a small vaccum hose which fitted the MAP's niplle very well. Unfortunately the nipple on the intake manifold has a different (smaller) diameter so the hose won't fit very well. That is why I see about 55kPa at idle. The engine idles very well - although very rich because of the high MAP reading. There is some (tiny) hesitation when stepping on the throttle (I haven't touched enrichments yet) but that will be certainly sorted out. So today was the actual first day of my MS'ed 2002 Miata.
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08-17-2006, 07:45 AM
#97
Originally Posted by Reverant
Update: I found a small vaccum hose which fitted the MAP's niplle very well. Unfortunately the nipple on the intake manifold has a different (smaller) diameter so the hose won't fit very well. That is why I see about 55kPa at idle. The engine idles very well - although very rich because of the high MAP reading. There is some (tiny) hesitation when stepping on the throttle (I haven't touched enrichments yet) but that will be certainly sorted out. So today was the actual first day of my MS'ed 2002 Miata.
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