TB Spacer Issue SOLVED! MAP Sensor now reacting correctly.

[magnumb]

95 Yukon TBI.
By rasing the TB the slope of the MAP sensor vaccum line was reveresed and was causing a slight amount of fuel to be trapped. This was causing a delayed reaction with the A/F mix and rough idle. I've raised the MAP with a zip tie for now but I'm going to drill another hole in the MAP sensor bracket to raise it about an inch.

[1988 GMC 355]

Hmmm interesting to know, mine is just hanging loose too, what kind of rough idle? like a hiccup or skip? or very bad?

[Doober]

Strange... I don't seem to be having that problem and mine is sitting a good 2-3" lower than the throttle body.

[kjk1500]

Thats different I dont have that problem with mine when its hanging loose.

[magnumb]

Hmmm interesting to know, mine is just hanging loose too, what kind of rough idle? like a hiccup or skip? or very bad?

More of RPM hunting and a slight shake. Also, it would fall on it's face when given more than 1/2 throttle when cold/warm.

[magnumb]

Thats different I dont have that problem with mine when its hanging loose.

I noticed you have a corvette servo. Where did you get yours and was it worth it?