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Old 03-28-2010, 01:02 PM   #11
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Hey Danthurs...I called autozone and they gave me autolite part number 606..is this the rite part number?
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Old 03-28-2010, 01:21 PM   #12
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606 is stock heat range, 605 is one rang colder, 104 is 2 colder, 103 is 3 colder. If you have made no real mods to the car, 606 is fine, if you added a few extra mods, like a smaller pulley, then go 605. I get my autolites from menards for about $2.60 a pair.
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Old 03-29-2010, 09:40 AM   #13
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The other plugs aren't necessarily wrong for our engines, they don't perform the best in our engines.

We aim to help you get the best performance and mileage from your car.
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Old 03-29-2010, 09:41 PM   #14
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Thank you bill...will i get bad milage or bad perfomance with ac delco plugs or both for that matter?

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Old 03-29-2010, 09:47 PM   #15
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I change the plugs and took it for a run but now it is reading back to p0300 it changed again from p0305. trying figure out what is causing this.
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Old 03-30-2010, 09:14 AM   #16
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P0300 is multiple cylinder misfires, meaning it'* not always one cylinder.

If you haven't changed the plug wires yet, please...do it. Sounds like they are bad or misrouted.

Ensure the #4 and #6 wires aren't touching the O2 or it'* wiring.

Do a quick inspection for any vacuum leaks and ensure the fuel in the tank is the right grade (super)
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Old 03-30-2010, 12:01 PM   #17
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Thank you Bill, The wires are in good shape as far as a can see they were put in late last year..From reading the forums here I learned about spraying carb cleaner to check for vacuum leaks i did that on sunday and no change on the rpms..i also read about the wires touching the 02 sensor.. when putting in the spark plugs I notice cylinder 6 wire resting on the 02 sensor not the the wire and i reposition it. P0306 Misfire cylinder 6.. was my first reading and has not come back. However before me moving the wires or working on the car it had already change to P0300.

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Old 03-30-2010, 03:25 PM   #18
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Ok.. still having trouble though.

What brand wires are these or what do they say on them? Most of the issues we have with the 3800'* from the area you are speaking of is typically ignition related.

ICM'* are uncommon, but possible
Plugs and wires are the most common
Crank sensor .. happens slightly more common than an ICM

The way you are describing the issue and looking at it. I'd think plugs or wires. Could also be a plugged catalytic or fueling issue, but you haven't mentioned any symptoms that lead us that way.
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Old 03-30-2010, 09:31 PM   #19
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The wires are red mag xts if not mistaken..I also tried spraying water on wires with engine running and no change on idle or no sparking..Today I added Chevron fuel injector cleaner to see if that helps. I have not changed the fuel filter yet i'm wondering if this can cause misfire if clogged when punching the gas.. i'll try that next.
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Old 03-30-2010, 10:16 PM   #20
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To rule out a fuel related problem, you need to check the fuel pressure. have you pulled your plugs and inspected them? What do you have in there now?
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