car jerks when in gear at low rpm's?

[mufflerboy]

Ok my car does this to and I fix it by turning up my fuel
pressure 5 psi. When i go to the track I turn it down agian because my car runs higher trap speeds when its leaner but the drivability goes away. Try it its free and wont hurt anything.
Good luck

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93 coupe,373's ripper shifter,MAC 1-5/8 equal lengths,MAC 2-1/2" H-pipe with cats,flowmaster 2 chambers,lowered 1-1/2" with BBK springs.Motorsport HD clutch,,FMS pullies,75mm bullet maf,walbro 190 lph fuel pump,kirban adj fpr.edelbrock 6037's e303, cobra intake
frpp 1.6 roller rockers
mac cold air kit msd 6al
3" cowl hood factory five upper and lower control arms wms subframe connecter and strut tower brace
12.81@ 105.1 1.66 60ft