my TPS readings
Stock tps readings were as follows;
0.73 holding throttle blades closed against stop depressing center plunger.
1.36 normal position without depressing center plunger but against it.
4.50 holding throttle blades wide open horizontal, not over center as I had made a stop so that blades wouldn't do that but with driving it and going wide open the computer didn't like it and went in limp mode w/codes of stuck?? and another code which when cleared I could drive until I nailed it again so I took the stop off.
I don't have a note of the BBK readings but they were probably similar or the same! I did take the snap ring out of the end of the large adjustment screw in the motor end and promptly watched the plug go sailing in ??? so I tapped it 5/16"NF and used a set screw and jam nut to position the spring tension after adjusting the throttle blades to not jam shut. There is a small setscrew that you loosen to adjust the large one (this is under the motor mtg plate which has to be removed to adjust or mess with things). I have tried a lighter spring but it just make the warm engine surge at slight throttle opening for a few seconds, this is the only trouble I have had at all and the stock tb, Injun CAI (which says no tune needed) did and still does. The stronger stock spring has less surge and time frame than the lighter one.
At the end of the instruction sheet BBK said if you couldn't get the same readings to cut off the alignment tab so you could rotate it to get the desired reading.
I may have taken a small chain saw file to elongate the holes to do so if I needed to, as I don't remember what I did.
Dale C.
