ok I cant figure out what the heck or why the heck its doing this....It shifts perfect 1st, 2nd then when I hit third its just like "KA-POOP" and just can't get up like it wants too....I changed the spark plugs and the wiring harness...did the fuel injector cleaner ...any other sugestions?..the weird part is it only does it once in a while but it still really weird that it does it...I know its not the way im driving cuz I've had other people drive it and it did it.

 

So it backfires then lags?

 

tune it!

 

I agree with Running925; tune it up. If I were you, I'd adjust the timing and the valve clearances first. Then again, it could be something wrong with the clutch...is this an auto?

 

What kind of engine. I have the same problem in my B16 EG.

 

yeah its a b16yd or watever...no its a 5 spd...

 

:wtf: ....b16yd? Maybe D16?