I smell gas fumes when my car idles, no cat, 3 inch exhast. Is it time for new o2 sensors??

 

I'd start with a basic tune up, and go from there. Plugs, wires, O2's, possibly a coil depending on the age of the current one, change the oil, ect.

 

2 years ago, I dynoed my '93 on a portable dyno. With only a Moroso CAI, Hypertech "Generic" chip, Taylor 8 MM wires, MSD "Blaster" coil, Splitfire plugs, MSD 7AL-2, Flowmaster "cat-back", gutted cat, throttlebody airfoil, 3200 stall, 4.10's, and ET Streets. No internal engine mods, stock, FPR, and exhaust manifolds.

I dynoed 268 HP at the rear wheels (best out of 3 pulls)!
The dyno was set up at my local track, and it was dynoed between a 13.0 second run and a 12.9 second run, so I know the car was running right. The car eventually ended up running 12.82 @ 106 MPH in that trim.

Anyone care to volunteer a theory?

Frank

 

My knock sensor was overreacting when I installed my headers, and I lost power. I had it deadened with LT1 edit but you dont have that option. Im not certain if you can use the LT4 knock module on the 93's but you might look into it. You might also check your MAP sensor, mine went out and the car ran like crap and only dynoed 265rwhp with full bolt ons.

 

I dynoed 280hp and 312tq with mods in sig minus the headers. You have a problem somewhere. 90,000 miles also.

 

I don't think the knock sensor needs to be desensitized... I believe it's not sensitive as is.

 

My car put down 287RWHP and 317RWTQ when it just had Jet-Hot LT's, CAI and a stock slipping clutch. It seems like something has to be wrong with it...

 

Already did plugs, wires and coil. I just figured I smell fumes from no cat and thick exhaust.

 

I dont see 300rwhp for an auto, stalled LT1 with minor mods. I would guess 275rwhp is where you should be.