97 M62 cylinder misfire 1 & 2 codes PO301 & PO302

[Lou840]

So here is my problem the car runs great in town and on the freeway but when I step on the gas to get her going the engine light comes on and within seconds I lose power. The error codes are misfires on cylinders 1& 2. I have change the throttle and position sensors, cleaned the throttle bodies,swapped coils 1 & 2 and change injector 2. Any help would be greatly appreciated.

Thanks
Lou

[danieljames]

Hey Lou, I have a similar problem with mine. Ended up being a coil. Now I'm left with a p1145 code?
The generic scanners won't break the issue down, you'll have to get to a shop with a commercial scanner.

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[Timm]

That is very likely to be a failing catalytic converter on bank 1. When a high gas flow is produced during harsh acceleration it produces back-pressure which stops complete cylinder evacuation - and that will cause a misfire. If this is the case the situation will slowly get worse. More details here:

http://www.meeknet.co.uk/e31/E31_840...l_Throttle.htm

[danieljames]

That is very likely to be a failing catalytic converter on bank 1. When a high gas flow is produced during harsh acceleration it produces back-pressure which stops complete cylinder evacuation - and that will cause a misfire. If this is the case the situation will slowly get worse. More details here:

http://www.meeknet.co.uk/e31/E31_840...l_Throttle.htm

Wow, a post from the master! All heed!

Probably the problem with mine as well.

But while I'm here....... What are these relays under the dme. One is for the wiper....

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[Timm]

What - you haven't used the relay finder yet?

http://www.meeknet.co.uk/e31/Timms_B...lay_Finder.htm

[danieljames]

What - you haven't used the relay finder yet?

http://www.meeknet.co.uk/e31/Timms_B...lay_Finder.htm

Thanks Timm!

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[kiwiCSi]

Is that a "spare" fuse I see lying beside the orange '518' relay?!!

But while I'm here....... What are these relays under the dme. One is for the wiper....

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[Lou840]

That is very likely to be a failing catalytic converter on bank 1. When a high gas flow is produced during harsh acceleration it produces back-pressure which stops complete cylinder evacuation - and that will cause a misfire. If this is the case the situation will slowly get worse. More details here:

http://www.meeknet.co.uk/e31/E31_840...l_Throttle.htm

Timm,

First off shame on me for not checking your site before I asked the question. But thanks for reinforcing what I thought might be the problem. Next time I have some issue I know where I should look besides here. I am sure we will do this again another time.

Thanks very much
Lou

[danieljames]

Is that a "spare" fuse I see lying beside the orange '518' relay?!!

Yeah it was a quality repower job by the mechanic........

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[Lou840]

That is very likely to be a failing catalytic converter on bank 1. When a high gas flow is produced during harsh acceleration it produces back-pressure which stops complete cylinder evacuation - and that will cause a misfire. If this is the case the situation will slowly get worse. More details here:

http://www.meeknet.co.uk/e31/E31_840...l_Throttle.htm

Timm
Put the new CATS on and all is good with the old girl, as I said before need to look at the archives and your WEB SITE. Thanks to all for the help and info.

Lou

[Timm]

I'm glad that sorted your problem - great stuff!