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Old 11-29-2012, 04:32 PM   #101
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So I thought everything was good until last night when I drove the car to the store. About half way there it started to run a little rough again. This morning I took it for a drive and it was good for about 3 minutes and then started running rough again. I think that maybe one or two plugs might be bad and once they get some heat in them they start missing. I have a set of Autolite racing plugs that I ordered from Summit that I'm going to install tomorrow or Saturday and see if that is the issue. If it isn't then I'm at a lost.
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Old 11-29-2012, 04:33 PM   #102
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Sounds like the PIP
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Old 11-29-2012, 05:04 PM   #103
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What's the PIP?
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Old 11-29-2012, 05:50 PM   #104
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Basically the sensor inside the distributor. Could also be the TFI module on the fender.
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Old 11-29-2012, 06:13 PM   #105
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I have an MSD distributor so if you're talking about the magnetic pickup module inside it that has already been replaced not that long ago. I had an issue at one time where the car would cut out above 5000 rpms and I thought it was the pickup so I ordered a new one from Summit. One of the wires on the old one had worn through and I figured that was the issue. I still had the issue after replacing but it turned out to be because of the hole in the rubber elbow on the intake tube. Once I replaced it the car ran great.

I'll replace the plugs since I already have a new set and see if that resolves the issue. If it doesn't, what's the TFI module? Is it on the passenger side?
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Old 11-29-2012, 06:43 PM   #106
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Yeah, under where the stock intake was. A PIP module is in ever distributor, stock or otherwise. You need to remove the upper bowl of the distributor to get under the piece that the rotor set in.
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Old 12-02-2012, 09:01 PM   #107
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I had Phil test drive the Cobra tonight to see whether he thought what I was feeling was a missfire or a vibration and he says it's a vibration. My next step is to check the harmonic balancer to make sure the new one is 28oz and not 50oz. If it is then I guess from there the next step will be to check the flywheel. If both turn out to be correct then I guess the engine comes back out to have it rebalanced.
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Old 12-02-2012, 09:09 PM   #108
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If you had the wrong weight on there that thing would shake the vehicle apart. It would be nearly undriveable.
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Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely lay your life before him

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Old 12-03-2012, 07:46 AM   #109
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It's not a horrible vibration. It just feels like a misfire but you feel it more under decel which I was too frustrated to notice before Phil drove it.
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Old 12-03-2012, 07:22 PM   #110
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Thats not the balancer then, I would still check, but if it was you'd definitely know.

I'd check the pressure plate, motor mount, trans mount or possibly the pullies.
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Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely lay your life before him

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