Misfires on 1 and 6
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Mudding
Joined: May 2013
Posts: 139
Likes: 2
From: Northern Michigan
Misfires on 1 and 6
So I tore the plenum off. New wires (Kingsborne 8mm), gasket and coils on the way.
I tested the coils with an ohm meter just for grins. My results weren't as profound as I was hoping. Meter set to 20k. 3 of the 4 pairs of output terminals were between 13.35 and 13.39. The two for cyls 1 and 6, top row drivers side, were coming in at 13.2. Not a big discrepancy, but is that enough to cause bad misfires?
Upon start truck would shake, misfiring, not until driving under a good acceleration would the idiot light come on. Always 0301 and 0306 (0300) for codes. Figured it was a bad coil. Guess I'll find out.
Replaced plugs to plus 4's about 2 weeks before the codes starting showing up. Made sure the plug wires were on the plugs firmly.
I tested the coils with an ohm meter just for grins. My results weren't as profound as I was hoping. Meter set to 20k. 3 of the 4 pairs of output terminals were between 13.35 and 13.39. The two for cyls 1 and 6, top row drivers side, were coming in at 13.2. Not a big discrepancy, but is that enough to cause bad misfires?
Upon start truck would shake, misfiring, not until driving under a good acceleration would the idiot light come on. Always 0301 and 0306 (0300) for codes. Figured it was a bad coil. Guess I'll find out.
Replaced plugs to plus 4's about 2 weeks before the codes starting showing up. Made sure the plug wires were on the plugs firmly.
Mudding
Joined: Jan 2014
Posts: 190
Likes: 2
So I tore the plenum off. New wires (Kingsborne 8mm), gasket and coils on the way.
I tested the coils with an ohm meter just for grins. My results weren't as profound as I was hoping. Meter set to 20k. 3 of the 4 pairs of output terminals were between 13.35 and 13.39. The two for cyls 1 and 6, top row drivers side, were coming in at 13.2. Not a big discrepancy, but is that enough to cause bad misfires?
Upon start truck would shake, misfiring, not until driving under a good acceleration would the idiot light come on. Always 0301 and 0306 (0300) for codes. Figured it was a bad coil. Guess I'll find out.
Replaced plugs to plus 4's about 2 weeks before the codes starting showing up. Made sure the plug wires were on the plugs firmly.
I tested the coils with an ohm meter just for grins. My results weren't as profound as I was hoping. Meter set to 20k. 3 of the 4 pairs of output terminals were between 13.35 and 13.39. The two for cyls 1 and 6, top row drivers side, were coming in at 13.2. Not a big discrepancy, but is that enough to cause bad misfires?
Upon start truck would shake, misfiring, not until driving under a good acceleration would the idiot light come on. Always 0301 and 0306 (0300) for codes. Figured it was a bad coil. Guess I'll find out.
Replaced plugs to plus 4's about 2 weeks before the codes starting showing up. Made sure the plug wires were on the plugs firmly.
Quote The two cyls #'s 1 & 6
There's your cue!
Wires #1 and #6 are companion connectors on the coil pack so you have a cross fire short!
Time to throw off the coils as soon as possible.
Reason--The coils are fired by a ground signal from the PCM!
One short circuit jolt into the PCM from that coil and its curtain for the PCM driver internal module---That's why the manufacturers install a ground link to avoid that--as best possible!~
Once running correctly see what your LTFR is?
Best of luck
T/V
Thread Starter
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Mudding
Joined: May 2013
Posts: 139
Likes: 2
From: Northern Michigan
Replaced JUST the wires. After comparing the resistance between old and new wires, the old ones were so bad I figured it was the wires. I also tested the new coils and they were testing a tenth off just like the old coils.
Anyway, everything is put back together, new Kingsborne wires, new plenum gasket, new throttle body heater plate, new serp belt. Pulleys were in good shape.
So far Misfire appears to be gone, running better, starts better, and I'm not getting codes for SAI anymore either...
Anyway, everything is put back together, new Kingsborne wires, new plenum gasket, new throttle body heater plate, new serp belt. Pulleys were in good shape.
So far Misfire appears to be gone, running better, starts better, and I'm not getting codes for SAI anymore either...
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