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Originally Posted by likenu2
Update: Got the dar back this morning and I have only one word to say about what Bob did.......WOW!!!! Running amazing, instant throttle response. It was a combination of 3 things, O2 sensors were moved from collector to the last header tube on the passengers side about 10" away from the head, the spark plugs were way too cold (needed a hotter plug), and the vacuum pressure was a bit low. I rides great now.
Joyridin"....I do not have the side pipe mount on my headers. There is no flange to join the header to the side pipe. Mine are one piece weilded from the collector to the heads. They were custom hand made.
Thanks to everybody for chiming in and giving me an education on just how EFI works.
Joe
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Glad to hear it worked out I suspected it would. Two questions.
1.) You said the vacuum pressure was to low. I assume this means you had poor vacuum at idle because of the cam overlap.
2.) You said your headers and pipes were a one piece weldment? Is there a hole or a slot in the fender where the pipe passes through?
Again congrats I am glad it worked out. Please give us a 1000 mile update so we know if it is still going well. It would be a service for anyone considering the change.