Author Topic: headers (Read 1630 times)

lockedyota · « **on:** Jan 15, 2006, 03:52:11 PM »

i just upgraded to a hedmann header . i'm getting an o2 sensor warning and a throttle body warning on the self diagnostis check. i replaced the exhaust system also but did not replace the cat. convertor would this make the o2 sensor go out.

79coyotefrg · « **Reply #1 on:** Jan 15, 2006, 04:25:43 PM »

Quote from: lockedyota on Jan 15, 2006, 03:52:11 PM

i just upgraded to a hedmann header . i'm getting an o2 sensor warning and a throttle body warning on the self diagnostis check. i replaced the exhaust system also but did not replace the cat. convertor would this make the o2 sensor go out.

im guessing you got the header cause you wanted better flow, if the cat is stopped up you aint gettin any flow

what size tube did you get?? hopefully at the very least 2" with a stock engine, 2 1/4 is best

get a generic cat with a 2 1/4 in and out

lockedyota · « **Reply #2 on:** Jan 16, 2006, 04:34:50 AM »

i didn't put a cat back in yet cause the original was plugged,It's a 2" exhaust with a flowmaster muffler and headman headers. i was debating wether to adjust the afm a couple clicks thinking it may be running a little lean with the headers and exhaust.

AKDuramax · « **Reply #3 on:** Feb 01, 2006, 07:17:09 AM »

ahh just toss the cat! screw emissions!!

whiteman · « **Reply #4 on:** Feb 01, 2006, 11:19:10 AM »

I have a downey header; when it was installed in my 4-runner it had straight 2 1/4" into a flow master and then 3" out, i really like the way it sounded, but I could have used a little more tail pipe, I only had 2ft. No cat.
It ran fine for awhile but after I had the truck for about two or three months it started running really rich, it would load up all the time and even with all the windows rolled up you eyes would water up and you get this really funny feeling, almost like you were high. I replaced the O2 sensor and it helped for like two days and then back to normal, I could not figure out what the rpoblem was.

You might start with the O2 sensor but you may need to investigate farther, I know that with the Downey header you have to purchase a universal o2 sensor and wire it in to the factory plug wire. I cant use a factory toyota O2 sensor, that may of been my issue.

Author Topic: headers (Read 1630 times)

lockedyota

headers

79coyotefrg

Re: headers

lockedyota [OP]

Re: headers

AKDuramax

Re: headers

whiteman

Re: headers

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	Author Topic: headers (Read 1630 times) 0 Members and 2 Guests are viewing this topic. lockedyota Rock Crawl'n Turtle Points: -91 Posts: 27 Member since Jan '05 Crawling with Marlin headers « on: Jan 15, 2006, 03:52:11 PM » i just upgraded to a hedmann header . i'm getting an o2 sensor warning and a throttle body warning on the self diagnostis check. i replaced the exhaust system also but did not replace the cat. convertor would this make the o2 sensor go out. Logged 79coyotefrg Rock Ninja Gold Turtle Award Turtle Points: 1452 Posts: 22,633 Member since May '02 Solid axle Toys Rule ! ! ! Re: headers « Reply #1 on: Jan 15, 2006, 04:25:43 PM » Quote from: lockedyota on Jan 15, 2006, 03:52:11 PM i just upgraded to a hedmann header . i'm getting an o2 sensor warning and a throttle body warning on the self diagnostis check. i replaced the exhaust system also but did not replace the cat. convertor would this make the o2 sensor go out. im guessing you got the header cause you wanted better flow, if the cat is stopped up you aint gettin any flow what size tube did you get?? hopefully at the very least 2" with a stock engine, 2 1/4 is best get a generic cat with a 2 1/4 in and out Logged AR-TTORA founder 22R bored.060,LCE stage II race cam http://pure-gas.org/ 32/36weber, Marlin 1200 NON ceramic clutch, L52SHD+dualcase #2919, cable-locker, Yukon 5.29 gears, 35's, Allpro ebrake, front springs, and high steer, F150rears RIP Nitro 9-29-07 I sure miss him $I\'m Down$ MarlinCrawlerInc IS NOT affiliated with TrailGear in any way lockedyota [OP] Rock Crawl'n Turtle Points: -91 Posts: 27 Member since Jan '05 Crawling with Marlin Re: headers « Reply #2 on: Jan 16, 2006, 04:34:50 AM » i didn't put a cat back in yet cause the original was plugged,It's a 2" exhaust with a flowmaster muffler and headman headers. i was debating wether to adjust the afm a couple clicks thinking it may be running a little lean with the headers and exhaust. Logged AKDuramax Rock Crawl'n Turtle Points: 77 Posts: 47 Member since Jan '06 hondas R like tampons... every pu$$y has one Re: headers « Reply #3 on: Feb 01, 2006, 07:17:09 AM » ahh just toss the cat! screw emissions!! Logged 83' toyota sr5 long bed 31x10.5 bfg mt's -under construction- 86' suzzuki samuri 33x14.5 boggers, 1.6 tracker spap, 4.62's locked trackuri axles, 4.1 transfer, exct. 02' chevy 2500HD duramax 35x12.5 mt's fabtec 6", edge box,k&n intake, mbrp 4" duals, exct. whiteman The 1K Club Turtle Points: 669 Posts: 1,276 Member since Jan '05 Re: headers « Reply #4 on: Feb 01, 2006, 11:19:10 AM » I have a downey header; when it was installed in my 4-runner it had straight 2 1/4" into a flow master and then 3" out, i really like the way it sounded, but I could have used a little more tail pipe, I only had 2ft. No cat. It ran fine for awhile but after I had the truck for about two or three months it started running really rich, it would load up all the time and even with all the windows rolled up you eyes would water up and you get this really funny feeling, almost like you were high. I replaced the O2 sensor and it helped for like two days and then back to normal, I could not figure out what the rpoblem was. You might start with the O2 sensor but you may need to investigate farther, I know that with the Downey header you have to purchase a universal o2 sensor and wire it in to the factory plug wire. I cant use a factory toyota O2 sensor, that may of been my issue. Logged