i posted this in the Hybrid Forum.. but nothing. so i might as well try here.

about 2 months ago i swapped in a '99 JDM SiR B18C into my '98 EK. my motor setup is as follows. B18C, Skunk 2 IM, DC 4-1 Header with USDM cat, CTR b-pipe, and Spoon N1 axle back. im running a JDM P73. when my motor is coasting in gear at around 2-3k rpm i tap the throttle to accelerate again and it will 'pop'.. im guessing its backfiring.. i changed the O2 sensor thinking it was that.. no change. so im guessing its loading up when decelerate and, obviously, pops when i get back in the throttle.. any insight as to what i can do to fix my problem would be great.. thanks!

 

It's a possibly your fuel pump is dying.

Does the "pop", sound like it's coming from the header area?

Check my recent thread, I found out it was my fuel pump.

 

my gsr eg hatch usta do this . when it poped i was shooting flames. have someone ride behind you looks hot. but other than that i never figured it out either

 

never thought it would be the fuel pump.. a buddy of mine mentioned that it might be the TPS because i also have a problem with bogging when i rev from idle..

 

Timing?

 

timing is perfect.. i checked it about 3 times actually..

 

Start with the basics plugs, ignition wires, dizzy cap and rotor. If those check out then calibrate the tps and change the pump... Do you have a fuel pressure gauge?

 

all the basic stuff was changed when i swapped the motor in.. im going to have the TPS redone and then ill change the pump is problems still persist.. and i have no FPR.

 

I have a 00 coupe with a jap spec B18c
and my car backfires too,
A friend of mine told me i was shooting flames on the highway
im guessing the car is jus running rich
But so far ive never had any problems

 

someone once told me that it was the backpressure from the exhaust causing this...but i dont know for sure.