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Old 04-05-2019, 02:25 PM
TMair TMair is offline
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Trouble codes after sitting through the winter

Hello All
Ok I have a 96 BMW Z3, it ran great when I put it up for the winter, full tank of fuel, I did take the battery out for the winter and actually had to put a new battery in it.

I did put some HEAT in the tank, along with sea foam full disclosure.

It runs great when it is cold but when it warms up it misfires, and of course that makes it run poorly.

I am getting codes po300, po325, po330, po303, and po304.
I have looked these codes up on line, but am wondering what would/could cause all of them after sitting over the winter?

Any help would be greatly appreciated!!

Thanks in advance,
Terry
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  #2  
Old 04-05-2019, 03:14 PM
zed3coupe zed3coupe is offline
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Misfire codes. That stuff in the fuel maybe effecting how it is running. Put fresh fuel in the car and see if it runs better.
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Old 04-05-2019, 06:14 PM
TMair TMair is offline
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Thanks for the reply, the reason I put that stuff in the tank is because it was running bad to begin with I've ran sea foam in it before to get the fuel gauge to work, and gas dryer I wouldn't think would make it worse.
Thanks again.
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Old 04-07-2019, 01:50 PM
TMair TMair is offline
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So for anyone who might care the problem was the spark plug holes were full of water, can't imagine that much condensation but that is the only thing I can think of
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Old 04-09-2019, 11:36 AM
kingfisher1 kingfisher1 is offline
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Mine had similiar issues misfires,etc..just put new fuel in there and cleared the codes.Code reader will save you money!
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Old 04-10-2019, 10:56 AM
zed3coupe zed3coupe is offline
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Quote:
Originally Posted by TMair View Post
So for anyone who might care the problem was the spark plug holes were full of water, can't imagine that much condensation but that is the only thing I can think of
Was car in garage or outside? Had a similar situation with my old E36 when it would heavy pour, water would run down into cylinder 6 spark plug hole.

If it was sitting in a garage, I don't understand how water would make its way down a spark plug hole.
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Old 04-10-2019, 11:51 AM
TMair TMair is offline
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Quote:
Originally Posted by zed3coupe View Post
Was car in garage or outside? Had a similar situation with my old E36 when it would heavy pour, water would run down into cylinder 6 spark plug hole.

If it was sitting in a garage, I don't understand how water would make its way down a spark plug hole.
It was actually in one of those frames with the fitted tarp cover on it, I took the battery out, then zipped the door closed on the garage and left it for the winter, which wasn't all that long, but we did get a fair amount of snow.

Your guess is as good as mine as to how that much water got in there, and it was in all 4 spark plug holes to one degree or another, so I guess lesson learned.

There was also those little white spots on everything that is aluminium under the hood like everything had gotten drops of water on it.

When I put my side by side in the tarp garage the ground was dry, just can't imagine.

Thanks for the reply.
Terry
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Old 04-10-2019, 11:55 AM
TMair TMair is offline
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Originally Posted by kingfisher1 View Post
Mine had similiar issues misfires,etc..just put new fuel in there and cleared the codes.Code reader will save you money!
Yes I have a code reader, that's how I got the codes mentioned in the original post.

I was actually hoping as happens so many times on here someone would tell me how they had the exact same issue and here is the easy fix!! So now I guess in the future I can be that guy!

I just would have never guessed that much water could accumulate over a short winter in a covered enclosure!!

Thanks for the reply
Terry
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Old 04-10-2019, 01:50 PM
zed3coupe zed3coupe is offline
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Yeah that seems weird. Water in spark plug holes will def drive you crazy, been there before!
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Old 04-16-2019, 08:13 PM
TMair TMair is offline
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Quote:
Originally Posted by zed3coupe View Post
Yeah that seems weird. Water in spark plug holes will def drive you crazy, been there before!
Yeah I would really like to know how it got there, I would think if it leaked in there that it would have only gotten one or two plugs not all 4 of them.

Thanks for the reply.

Terry
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