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View Full Version : 2.8 AHA - replacing MAF and Coil because of Misfire's P0300, P0301, P0302......



egabriele1
01-24-2011, 03:24 AM
Besides Plugs and wires is there anything else that could be causing these codes. I plan on replacing the MAF and Ignition Coil Tuesday. All 4 O2 sensors, plugs, and wires only have about 15k on them. Valve cover gaskets done about 10k ago, Plug holes are dry. I know what the codes are...but cylinders 1 (p0301) and 2 (p0302) do not share the same coil do they? I do have an LLtek air intake with a K&N cone filter, but I have had no MAF problems up until this point. Car is a 1999.5 2.8 30v, AHA.

Thanks!

somebody5788
01-24-2011, 06:00 AM
Besides Plugs and wires is there anything else that could be causing these codes. I plan on replacing the MAF and Ignition Coil Tuesday. All 4 O2 sensors, plugs, and wires only have about 15k on them. Valve cover gaskets done about 10k ago, Plug holes are dry. I know what the codes are...but cylinders 1 (p0301) and 2 (p0302) do not share the same coil do they? I do have an LLtek air intake with a K&N cone filter, but I have had no MAF problems up until this point. Car is a 1999.5 2.8 30v, AHA.

Thanks!

Coil is usually one of the last things to go on a 30v

MAF and CTS cause multiple misfires but since it's 1 and 2 codes only ATM thats a little odd, plus usually you get codes for the MAF or CTS.

Try cleaning the MAF. The oil in the K&N's is brutal on the sensor specially on the 2.8 when the filter is mounted right to the MAF.

Ldiaz12
01-24-2011, 06:14 AM
I had the same exact codes! what I did was clear them, cleaned my maf, and they never came back again and car runs fine!

bryangb
01-24-2011, 06:27 AM
I've been through 3 coilpacks in the past 6 months on my 30v.

somebody5788
01-24-2011, 06:36 AM
I've been through 3 coilpacks in the past 6 months on my 30v.

I've got 161000 on my original

If it was the coil he'd have like 1 and 3 and 2 and 4 or something like that, not 1 and 2

Ldiaz12
01-24-2011, 06:40 AM
Same here I have 161,179 miles on the car, never replaced the coil packs.

bryangb
01-24-2011, 11:13 AM
The original went out on mine around 158k. Got a replacement from FCP Groton and that one only lasted 4 months. Went to the junk yard and that one lasted 2 months. Now i'm back on another FCP coilpack that I got due to a 1 year warranty on the original one I purchased.

I'm just saying, I wouldn't say they rarely go bad as it could definently be a potential cause of the OP's problems.

somebody5788
01-24-2011, 01:38 PM
If they go out you probably have the wrong gap on the plugs are something. Making the coils over work themselves is a good way to make it go bad.