yes it is the tb..when they drilled the hole in the middle they didnt drill it at the anglle that the air would be going threw it at an idle..they drilled it straight..drillling the hole out at an angle is the propper way to fix it but drilling a sligtly bigger hole and turning down the idle screw afterwards will correct the problem also
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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
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