Need some help i have the $OD mask , iam having trouble getting the park idle right . What is happening my PCM thinks it is lean but it is actually rich because of my cam overlap . I adjusted my O2 values around and it made no difference . So my thoughts are do i have to go into open loop at idle to correct the problem . If i have to go into open loop what tables do i need to change . Thanks

 

I'm working on cam tuning as well and found this thread helpful.
https://www.thirdgen.org/forums/diy-...ome-those.html

Also https://www.thirdgen.org/forums/diy-...uide-book.html

Good luck

 

I have been looking and reading and never seen that thread !!!! Thanks that is exactly what i was looking for . I will experiment later this week and i'am sure i will have some questions . From a quick look it sounds like the right way to tune the idle .

 

That first thread was very interesting so i jumped in head first last night . The main reason why i was so interested in it, is i failed my emission test at idle HC 480ppm . So i tweaked my 02 tables by 150mv at idle took a guess as i had another test today so i will have data to compare too . Well i passed and my HC 111ppm sweet. So my question is now that i no what my readings are should i lower my values more to get lower HC or should i keep it the way it is . My thinking is if i lower the values a tad more the closer to 14.7 i will be at idle ?