lucky1357

I have a 93 6spd....19k miles on it, well kept original car except for the Borla exhaust it had on it when I purchased it.Car pulls fine up until 4500 or so...then it starts to break-up . Ive changed the fuel filter,run 93 octane.I assume plugs are original to the car. Any ideas here..??....bad opti, wires...???.....

tblt44

Opti would be my next guess

HammerDown

Sure does sound like an Optispark problem. Have you had a shop check it for trouble codes?

rithsleeper

Put a fuel pressure gauge on it and drive with it taped to your windshield. 19k is really not much and sitting long times inbetween drives means you prob have a lot of trash in the tank. Ive had trash get in the line and make it all the way to regulator before.... you would think fuel filter would have gotten it.

Easy check, could save you lots of headache later.

96GS#007

Hmmmmm.........nearly 20 year old plugs and wires. I wonder where I'd start before I start throwing money at it

383vett

Plugs and wires are often the cause of high rpm miss.

Muffin

Almost a sure thing.

lucky1357

Thanks for the responses......Ill change the plugs and wires.....seems like its the place to start ..