MyE28.com

The b34 throttle has an adjustable throttle stop screw. I would believe this effectively allows adjustment of the throttle plate at idle. The b35 throttle on my '89 e24 (the factory throttle) does not appear to have that built into the linkage. I haven't pulled it off the motor but is there another feature on the linkage that "bottoms out" on the return? I'm seeing some variation of the TPS signal at idle and I'm trying to narrow down its a throttle issue, a TPS issue or a megasquirt issue.

The B35 has an adjustment that covers base idle and full throttle at the same time. I guess they figured minor variations in base throttle adjustment wouldn't really have that much effect on full throttle opening. It's the big plate on the cable side that has a 10mm nut and a circlip. Loosen the nut to adjust the throttle.

Thank you Paul. That is good info to have. I still have some questions about M30 throttles as there would appear to be 3(+??) different types of throttles on the m30. The throttle on my b35 is different than my b34 which is different that the bored out throttle I have sitting on the shelf from many years ago. I'll post some pictures for future reference when I return from vacation.

For future reference for anyone that happens upon searching for this thread, my TPS issues were related to the throttle linkage binding up because the plastic nut on the end of the linkage broke. Not throttle or MS related.