Hey. I've got this annoying/dangerous problem with my car and I don't know what it is and what is causing it. I don't really know how to simply explain it, so I'll just explain what the car does. This happens in any gear at idle. I'm just sitting at a stoplight, and all of a sudden, my car sorta lurches forward, and have to fully apply the brakes to keep the car stopped. The tach shows the RPMS jumping around, ~100 RPMs. It does this completely at random, in park, drive, or wahtever at idle. I installed an open air element this week, and I can tell sorta what it does when it happens. I can hear the "sucking" sound the car makes when it first starts, but it's at random and in sync with the surging. The car is a '92 RS 305 TBI. Thanks for your help.

 

im somewat like that too. car just gets random acts of power.
very weird. 91 pont firebird 305 v-8

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91 FireBird 305 V-8
no true mods,
ghetto rigged cold air intake,
People dont have a soul, its just something parents made up to frighten little children, like the boogie man, or micheal jackson..."

GheTTo Riggers INC.
We Make Mcgyver look Like Crap

 

It sounds like a defective egr valve.I had the same problem on my Jimmey.

 

FiReBReTHa, that's EXACTLY the problem I'm having.