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Help Needed
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Posted by: Bpenrod

I just installed a new Athena 500cc big bore kit on my 07 ltr. Now it backfires on the decerleration. Any suggestions on what might be causing this? (its not timing i am sure of that) Thanks.

Posted by: racedad70

Not trying to insult your intelegence,but sounds that the map needs some work.

Posted by: Bpenrod

go ahead i am just looking for a solution lol. That definately is something that i was considering because i have a power commander also and i figured the mapping could be off since the compression changed so much. What about the value gap? could that be a reason?

Posted by: racedad70

Yea,if you have not re-mapped it from stock bore then that is your problem.Go to www.lt-***********.com and do a search for PCIII maps and you may find one to fit your application.

Posted by: racedad70

quote:
Originally posted by racedad70
Yea,if you have not re-mapped it from stock bore then that is your problem.Go to www.lt-***********.com and do a search for PCIII maps and you may find one to fit your application.

I guess it didnt like it spelled out(lt-***********).Theres more than one way to beat it........

Posted by: racedad70

quote:
Originally posted by racedad70
I guess it didnt like it spelled out(lt-***********).Theres more than one way to beat it........

Damn!lt-r450//central

Posted by: Bpenrod

ha ha it didnt work again. Whats the website? Thanks for that advice. yes it is still running on the stock map because i cant find one for the modifications i have on it plus its like 300 to get it dyno tuned

Posted by: hondaracer31

If you're still on the stock map, it is WAY too lean!

Posted by: Bpenrod

Yes the mapping is definately WAY too lean. I figured out why it was backfiring when i decelerated though, it was because with the big bore kit they gave me the wrong gasket for the exhaust to manifold. it got destroyed and my pipe was comepletely loose. I put the old gasket on last night and it runs perfect.....minus the mapping. Thanks for all of your advice guys i am getting it dyno mapped on thursday.