I have a 91 LB9 305 tpi auto car. Late last fall I put in 3.73 gears and the car really woke up. I ended up running a 9.41 at 76 mph in the 1/8th mile track nearby. It was my first time so I have no idea how fast it ran before and have not been back. But since I got the car out of storage a month ago it has not ran as good. The car does not pull as good or have the punch off line like it had last fall, kinda like how it accelerated with the old 2.73's. When I first got it out of storage the car was not idleing very good after it warmed up. It had a miss similar to how a car runs when moisture is in the distributor cap. I filled it up with gas and added some seafoam and have since gone through 4 tanks and it does idle good and doesn't have the miss. The SES light was coming on last fall because I did not have the speedo hooked up but did install the correct speedo gears before I started driving the car this spring and I no longer have the SES light coming on. My mods include - no cat(cutout in place) dynomax catback, KnN's, airfoil, ported plenum, TB bypass, aftermarket fan switch, aluminum D/S, bosch +4 plugs, crank pulley, Performance Resource chip. I replaced the injectors 2 years ago with motorsport 19lb and I have been wondering if they could be going again. A mechanic friend said the original went because my car sits too long over the winter and is not driven. The car has 30,000 miles on it also. I almost got beat by a stock 00 toyota celica so I know something is wrong so help me out guys. Thanks in advance.

 

have your injectors flow tested... they aren't that hard to get to. Try pulling the chip and replacing with the old before doing anything. Also check the fuel filter and pressure at the TPI.