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91chevyz28 · 02-22-2009, 10:34 AM

91 Z28 w/ 305 TPI has rough idle and at idle if throttle is cracked it bogs then idle goes up.Sometimes it pops out of the TB. I've changed the following:
spark plug wires,egr,new distributor w/ cap,rotor and module,map sensor.TPS senser,oxygen sensor,have fuel pressure guage(pressure holds when ignition turns on does not drop),timing is set,and new coil(MSD) any ideas I am stumped!!!

02-22-2009, 10:34 AM	#1
91chevyz28 Join Date: May 2005 Location: Dumont Posts: 231 iTrader: (0)	TPI rough idle problem please HELP! 91 Z28 w/ 305 TPI has rough idle and at idle if throttle is cracked it bogs then idle goes up.Sometimes it pops out of the TB. I've changed the following: spark plug wires,egr,new distributor w/ cap,rotor and module,map sensor.TPS senser,oxygen sensor,have fuel pressure guage(pressure holds when ignition turns on does not drop),timing is set,and new coil(MSD) any ideas I am stumped!!!