im still having trouble with this rebuild. its an 88 gxl. it has some mods- no air pump or cats, rb headers and presilencer, custom magnaflow exhaust, throttle body mod. i triple checked the tps (resistance, voltage, and i even used the 2 led check) and that was all good. if i come down off acceleration, let off the gas pedal, and put it in neutral, it stalls out. when im idling or at a stop, and gently tip into the throttle, it also stalls. is this because of the tb mod? or is there something else i should be looking at? the rebuild has about 1800 miles on it, so im guessing its broken in now.

 

maybe theres a intake leak somewhere

 

i looked for leaks, found none yet. i threw the vac. gauge on there, im pulling 16hg. could a vac. leak still be present?

 

hmm....16 what mm or in of Hg?

 

16 hg

 

does removal of the secondary butterflies cause any stalling problems?

 

uhh.....16 inches of mercury or 16 milimeter of mercury......considering 1 inch= 25.4mm it makes a difference..check the units on ur vac gauge

 

sorry.....16 in. hg

 

how much vacuum could i lose from a small leak, say if a small vac plug came loose on the intake somewhere?

 

it also doesnt hold idle until it warms up. after its warm it idles fine, but has the stalling problems as mentioned earlier