when i wot my 350 it sometimes back fires is that normal? the only engine mods i have are fujita short ram intake and hks hi-power exhaust.

tia

 

No, it's not normal.

 

Under full throttle or when you let off the throttle.

Also, is the car warm (at running temp 100%) or is it still cold?

I've noticed because of cam timing that the 2GR motor will backfire into the intake when it's cold on full throttle pulls.

 

Bcuz racing car.

 

i started hearing a subtle backfire when letting off the gas after i installed my hks hi power and f-sport intake.

 

My 350 does it, but only started after I deleted my resonator.

 

My brother was drivin my car yesterday and mind did, just kinda ignored it think it happen twice since i had my HKS exhaust never did hear it before with ma Tanabe

 

I occasionally get a nice pop - I have a the F-Sport intake and exhaust, with an Invidia midpipe. It's somewhat surprising that you get backfire with a stock midpipe.

 

When was the last time you replaced the spark plugs?

 

mine did it sometime

 

I experience this some days when pulling out of work. We literally have to jet out of our side-street to merge into traffic...so though I don't mean to, some times I get more aggressive with the gas than one should before the car is warm. I'll get a cool-sounded pop/backfire in-between the first-second shift.

 

when i let off the throttle and cold

for what i only got 44k on the clock

 

I heard a pop today... I usually hear it deceleration though

 

It's normal. I get about 100+ backfires just driving to and from school everyday lol. Especially if you delete the resonators and secondary cats, the backfires get really loud. One time, I downshifted under a tunnel and it backfired so loud, everyone's third brake lights came on lol.

 

I only get back fire when coming to a stop. love it!