Any new ideas on this folks.

My problem is a idle miss and hesitation/sluggish performance while driving. The idle miss becomes bad when I take the RPM's up to around 1000 and when driving at take off and afterwards I get sputering no performance and sometimes i hear what sounds like a intake backfire (Only when I push hard on the pedal). I have replaced or checked the following parts. 92 RS 3.1L 5 Spd Man
Distriubutor (Persision Tune Recommended) here after known as (PT)
Alternator (PT) Said bad diode
Cap/ Rotor
O2 sensor
MAP checked
Fuel Filter
Added B12 Injector cleaner
Gas line dryer
IAS Checked
TPS Swaped
EGR checked
Bosch wires (5 months old) no crack detected
AC RapidFires (5 months old)

Have reset and rechecked timing and firing order

Any Ideas?

 

I would be checking vacuum lines.

 

Thanks I bought new line last week just have not installed yet.

 

Thanks everyone for the help. The problem seems to be a MISSING Exhaust Man bolt. Little stupid thing that make you go HUMMMMMMMMMMMMM.

Thanks Again.