Change History

[quote=Ollie]
I changed coil pack in cylinder 1... started car and within a minute or so CEL flashing with following codes: SO originally all codes were on bank 2- switch coil packs from 1 side to the other now issues are on bank 1. Changing out 1 coil pack made matters worse?????? I am so confused.

P0102 Mass Or Volume Air Flow A Circuit Low Input
P0300 Random - Multiple Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P1314 Manufacturer Controlled Ignition System Or Misfire
P1315 Manufacturer Controlled Ignition System Or Misfire
P1319 Manufacturer Controlled Ignition System Or Misfire[/quote]

so let me see if I can expand upon this a bit and provide some help.

There have been a few -- not many -- cases of misfires arising from a bad MAF. And on one bank too. I'm not sure why this is but I can guess. The failure of the MAF is intermittent and gets in phase/time with the engine and the misfires occur. Now the thing is the phase may not be that steady or regular but when the misfires occur that's all she wrote. The DME doesn't go into some kind of research mode, let's see where this leads us mode, it just flags misfires and that's that.

Also, more cylinders might misfire but when the CEL comes on that's that too. The engine is shut off, the codes read, and the owner is left scratching his head with what he thinks is a complete picture albeit a puzzling picture but it is an incomplete picture.

Before you replace the MAF, have you tried running the engine without the MAF?
I just read some older posts and I read where you disconnected the MAF and then removed the oil tube filler cap. You have to be very careful and try one thing at a time. You have to disconnect the MAF, clear DTCs to reset all fuel trims to their defaults, then fire up the engine and give it some time to learn without the benefit of the MAF.

Also, I came into this late -- been dealing with family matters night and day these last 4 days or so and have 3 or 4 more days to go before things (I hope!) settle back down -- so I do not know what you've done or considered but have you considered, is it a possibility, there's bad gas in the tank?

[quote=Ollie]
I changed coil pack in cylinder 1... started car and within a minute or so CEL flashing with following codes: SO originally all codes were on bank 2- switch coil packs from 1 side to the other now issues are on bank 1. Changing out 1 coil pack made matters worse?????? I am so confused.

P0102 Mass Or Volume Air Flow A Circuit Low Input
P0300 Random - Multiple Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P1314 Manufacturer Controlled Ignition System Or Misfire
P1315 Manufacturer Controlled Ignition System Or Misfire
P1319 Manufacturer Controlled Ignition System Or Misfire[/quote]

so let me see if I can expand upon this a bit and provide some help.

There have been a few -- not many -- cases of misfires arising from a bad MAF. And on one bank too. I'm not sure why this is but I can guess. The failure of the MAF is intermittent and gets in phase/time with the engine and the misfires occur. Now the thing is the phase may not be that steady or regular but when the misfires occur that's all she wrote. The DME doesn't go into some kind of research mode, let's see where this leads us mode, it just flags misfires and that's that.

Also, more cylinders might misfire but when the CEL comes on that's that too. The engine is shut off, the codes read, and the owner is left scratching his head with what he thinks is a complete picture albeit a puzzling picture but it is an incomplete picture.

Before you replace the MAF, have you tried running the engine without the MAF?

Also, I came into this late -- been dealing with family matters night and day these last 4 days or so and have 3 or 4 more days to go before things (I hope!) settle back down -- so I do not know what you've done or considered but have you considered, is it a possibility, there's bad gas in the tank?