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From several posts we know that if secondaries are pinned you will get the CEL. I've studied this diagram, and every connector, to try and determine what tells the IMRC/PCM the secondaries are fully open.  I'm thinking that with a diode you could send the secondaries open voltage back to the PCM telling it they opened. You could bypass the secondaries all together, or remove them, and even run them pinned with no light. Thoughts?
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Well like I've said before I removed my secondaries completely. I have a CEL too. I figured out that if I unplugged the IMRC Controller Box then the CEL goes away but I lose power. But if I plug the IMRC Controller back in, the CEL comes back.
When I have the CEL my car makes power from 1000 RPMs. But when I dont have the CEL the car still acts like the secondaries are still in place. Thus, only making power after 3500 RPMS
Tim
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NySVT,
Coult it be when you have the it unplugged it doesn't get enough fuel? My car knowledge is minimal but thinking the computer doesn't think the secondaries are open so it runs lean, you get a cel with it plugged in but the power is there becuase the fuel is? I don't really know.. just a thought..
Ryan
98 V6 Lots-o-mods SOLD
88 Daytona Shelby Z TII (The beast)
87 Daytona Shelby Z TII (Holy 20 psi of boost batman!)
Mods- 3" Downpipe, Hi-Flow cat, 3" mandrel bent exhaust with Dynomax Ultra flow. Manual boost controller, TurboXS blowoff, 5th injector, large canister wastegate, Nitrous Express go-fast-be-happy kit, ported exhaust manifold, ported intake manifold, upgraded motormounts, eibach springs, strut tower brace. Oh and 20 PSI to boot.. my oh my...
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Don't you just love these Ford diagrams?
Although the PCM power relay and the IMRC module includes diagrams about what goes on inside, the PCM has nothing, leaving the interpretation of what goes on inside up to your imagination. This is not very helpful in diagnosing problems. Therefore I must imagine that the PCM has a crystal ball that tells it when the secodaries are open.
Jim Johnson
98 SVT
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I keep going back to something I read, when the secondaried open the PCM ramps the fuel map to compensate for more air.
If the IMRC is disconnected the PCM will never get the secondariy open signal and no extra fuel will be added.
How can we get the IMRC to tell the computer the secondaries are open fully when they are totaly removed.
I've looked at a lower intake and there are no switches, it has to come from inside the IMCR.
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Originally posted by nvmy98svt:
When I have the CEL my car makes power from 1000 RPMs. But when I dont have the CEL the car still acts like the secondaries are still in place. Thus, only making power after 3500 RPMS Exactly what I found when trying to stop the CEL with them pinned... Runs like a raped ape with the CEL. Like a dog below 4k without it... I captured some laptop data, but have not went through it yet. To answer the other question: There is a switch inside the IMRC box that is tripped at full cable travel.
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Where's Terry Haines when you need him? 
Dan Parmelee
1999 Acura Integra SiR-G coupe
"I heard Affleck was the bomb in Phantoms"
"Word, bitch! Phantoms like a muhfuka"
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Simply - there is a voltage that comes from the computer to tell the IMRC to open, then send that same voltage back to the computer ie secondaries open.
It's got to be from the switch or resistor. Time to get the volt meter out and rev up the 2.5
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Originally posted by sparks:
Simply - there is a voltage that comes from the computer to tell the IMRC to open, then send that same voltage back to the computer ie secondaries open.
It's got to be from the switch or resistor. Time to get the volt meter out and rev up the 2.5 Add it to "the list" for this weekend...
1991 GVR4
Lots of mods done.
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Originally posted by DemonSVT:
To answer the other question:
There is a switch inside the IMRC box that is tripped at full cable travel. ahem...  I have had the IMRC box apart (I had a bad one - only took about 5 weeks to get it replaced under warranty! :rolleyes: )
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