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Old 02-12-2012, 10:58 PM   #11
rtusnake
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Originally Posted by Scothew View Post
IMRC actuator is failing.

Its the control unit that sits under the intake that controls the butterfly valves that open up the 2nd intake valve on each cylinder at 3250rpm. I'd almost put money on it. Mine went bad on my 96 and the dyno looked like an EKG all the way up to 6k, and it took almost 30sec to get it there. Mine didnt idle weird though that i can remember
I was thinking that would could be a problem as well. I would just delete it and the butterflies and call it a day
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Old 02-12-2012, 11:57 PM   #12
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You can delete but unless you got gears (4.10+) its low end is gonna suck.
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Old 02-13-2012, 12:18 AM   #13
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Put some boost on it, that will help
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Old 02-13-2012, 04:58 AM   #14
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Forgot about the fact it was a Cobra with IMRC.
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Old 02-13-2012, 07:38 AM   #15
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Quote:
Originally Posted by Scothew View Post
IMRC actuator is failing.

Its the control unit that sits under the intake that controls the butterfly valves that open up the 2nd intake valve on each cylinder at 3250rpm. I'd almost put money on it. Mine went bad on my 96 and the dyno looked like an EKG all the way up to 6k, and it took almost 30sec to get it there. Mine didnt idle weird though that i can remember
Good catch, Scott. I completely forgot about IMRCs.
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Old 02-13-2012, 07:41 AM   #16
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Looks like that smog pump isn't hooked up...

Any MIL (Check Engine) lights? What are the codes? If the MAF is failing, it will run like crap. If the SMOG/Emissions system isn't properly working or leaking unmetered air, it will run like crap. If it doesn't "see" the rear O2's, it can run like crap. If the IMRC failed you can wire them open and it will run OK, but it should idle slightly rougher than stock around 600-700 rpm.

The MIL light bulb could be out so I would hook a reader into the OBD port and see what codes are stored.
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Old 02-13-2012, 10:19 AM   #17
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Old 02-13-2012, 11:46 AM   #18
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He was watching it run last night and seen sparks jumping off new fms wires. Put new ones on today and its fixed. Thanks guys
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