OBX header

Jeff_5_7 · 07-24-2007, 12:16 AM

ok i got an obx header off ebay and i installed it and redid my exhasut all the way back from the cat my cat is cleaned out now my exhaust back fires how can i fix this and also my car dosnt run very good now i think cus the timing is a little off or could it be cus the o2 sensor isnt hooked up

supramacist · 07-24-2007, 01:27 AM

Both of those dude. Your 02 sensor has to be plugged up or it just won't get up right.

j3pz · 07-24-2007, 01:59 AM

it will run like crap with either of the two... but i dont think that a loose/non-existing o2 sensor will cause a back fire

supramacist · 07-24-2007, 05:20 AM

The backfire is a by-product of poor timing.

f00g00 · 07-24-2007, 08:16 AM

The O2 isn't electrically connected or there is a hole where its supposed to be installed?
It needs to be installed to run properly so the ECU can adjust the fuel air mixture. It plays a large role in how the car runs, its the only thing that feeds back to the ECU when everything else sets up for whats going out of the motor.
Did the new headers bolt right up or did you have to grind anything?
Im also thinking of getting OBX's, my pace setters had to be heavily modded to work and I think ceramic coating will be better than my wrap job.

west_side_supra · 07-24-2007, 11:38 AM

i dont know my car back fires but its just because of my blow off valve not shutting fully

nothin better than a little 4" fireball out da back to piss the guy off riding your a$$

supra_91 · 07-25-2007, 11:01 PM

you dont have a blow off valve if u dont have a turbo. im assuming you dont bc u bought the obx headers

j3pz · 07-26-2007, 04:20 AM

was jsut thinkin about it... if the o2 sensor is connected, but not in the hole/loose, it may be reading for o2 than what the motor is putting out, thus advancing/retarding the timing, trying to burn the o2. this could also cause the backfire, correct? if im wrong i want someone to say so, dont wanna be putting false info out there.

Jeff_5_7 · 07-26-2007, 05:47 PM

obx header bolted right up but 2 days laster the head gasket blew outta the motor so i wanna get a turbo motor now

07-24-2007, 12:16 AM	#1
Jeff_5_7 3" Exhaust Join Date: Sep 2006 Location: Texas Posts: 109	OBX header ok i got an obx header off ebay and i installed it and redid my exhasut all the way back from the cat my cat is cleaned out now my exhaust back fires how can i fix this and also my car dosnt run very good now i think cus the timing is a little off or could it be cus the o2 sensor isnt hooked up __________________ Supras anrt ricers there Japanese Muscle 1988 supra n/a just finsihed 5 speed swap goal is 400hp with a turbo motor swap

07-24-2007, 01:59 AM	#3
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	it will run like crap with either of the two... but i dont think that a loose/non-existing o2 sensor will cause a back fire __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

07-24-2007, 11:38 AM	#6
west_side_supra 12psi boost Join Date: Sep 2006 Location: Marysville Washington Posts: 353	i dont know my car back fires but its just because of my blow off valve not shutting fully nothin better than a little 4" fireball out da back to piss the guy off riding your a$$ __________________ 7MGTE - 500hp never dyno'd exhaust: 3inch pipes no cat/powerhouse manifold/garret gt47 18psi/HKS SS racing wastegate fidenza cam gears intake: PHR 4inch intake/K&N filter/3 inch intercooler/ pipeFMIC/greddy type R bov/ fuel: 550cc PTE/ walbro 255lp / Aeromotive adj pressure regulator transmission: Fidenza flywheel/ACT extreme kit electronics: map ecu 1 / HKS EVC 9 gauges:boost,EGT,oil temp & pressure/aem AFR

07-25-2007, 11:01 PM	#7
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	you dont have a blow off valve if u dont have a turbo. im assuming you dont bc u bought the obx headers __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims

07-26-2007, 04:20 AM	#8
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	was jsut thinkin about it... if the o2 sensor is connected, but not in the hole/loose, it may be reading for o2 than what the motor is putting out, thus advancing/retarding the timing, trying to burn the o2. this could also cause the backfire, correct? if im wrong i want someone to say so, dont wanna be putting false info out there. __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

07-24-2007, 01:27 AM	#2
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Both of those dude. Your 02 sensor has to be plugged up or it just won't get up right.

07-24-2007, 05:20 AM	#4
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	The backfire is a by-product of poor timing.

07-24-2007, 08:16 AM	#5
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 292	The O2 isn't electrically connected or there is a hole where its supposed to be installed? It needs to be installed to run properly so the ECU can adjust the fuel air mixture. It plays a large role in how the car runs, its the only thing that feeds back to the ECU when everything else sets up for whats going out of the motor. Did the new headers bolt right up or did you have to grind anything? Im also thinking of getting OBX's, my pace setters had to be heavily modded to work and I think ceramic coating will be better than my wrap job.

07-26-2007, 05:47 PM	#9
Jeff_5_7 3" Exhaust Join Date: Sep 2006 Location: Texas Posts: 109	obx header bolted right up but 2 days laster the head gasket blew outta the motor so i wanna get a turbo motor now __________________ Supras anrt ricers there Japanese Muscle 1988 supra n/a just finsihed 5 speed swap goal is 400hp with a turbo motor swap

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