Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - MY18 86 intake backfire on throttle blip downshifts

uncivilised · 05-20-2018, 01:20 AM

Hey everyone,

Just picked up a new MY18 86 GT manual (with the updated fa20 engine, red intake manifold)

I have noticed that I hear the distinct intake backfire sound on fast input throttle blips when downshifting gears, the same popping sound that the engine makes when the DI seals failed on 2012 cars.

I can't replicate it all the time but its happened 4 times so far in the week that I had this car.

Car only has 550km on the clock.

12/2017 build

Car is completely standard.

No codes are shown.

From what I can tell it happens when its up to operating temperature.

I have sprayed carby cleaner on all the intake joins, throttle body and where the DI injectors are seated to the head and no obvious air leaks that I can spot.

I try to free rev the engine and blip the throttle while the car isn't moving and I can't replicate the issue, only when its driving. Even then I can't purposely replicate the issue while driving.

My 2013 86 GT never did this in the 100,000km and the many, many track days (abuse lol) that car was put through.

Anyone got any information I can use for when I take this to the dealer? I feel that I'm not going to have a fun time with this issue.

05-20-2018, 01:20 AM	#1
uncivilised Member Join Date: Oct 2012 Drives: 86 GT Location: australia Posts: 74 Thanks: 31 Thanked 27 Times in 20 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	MY18 86 intake backfire on throttle blip downshifts Hey everyone, Just picked up a new MY18 86 GT manual (with the updated fa20 engine, red intake manifold) I have noticed that I hear the distinct intake backfire sound on fast input throttle blips when downshifting gears, the same popping sound that the engine makes when the DI seals failed on 2012 cars. I can't replicate it all the time but its happened 4 times so far in the week that I had this car. Car only has 550km on the clock. 12/2017 build Car is completely standard. No codes are shown. From what I can tell it happens when its up to operating temperature. I have sprayed carby cleaner on all the intake joins, throttle body and where the DI injectors are seated to the head and no obvious air leaks that I can spot. I try to free rev the engine and blip the throttle while the car isn't moving and I can't replicate the issue, only when its driving. Even then I can't purposely replicate the issue while driving. My 2013 86 GT never did this in the 100,000km and the many, many track days (abuse lol) that car was put through. Anyone got any information I can use for when I take this to the dealer? I feel that I'm not going to have a fun time with this issue.