Installed Shortys & Faild smog test ;-(
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Junior Member
Joined: Mar 2001
Posts: 6
Likes: 0
From: Mission Viejo Ca.
Installed Shortys & Faild smog test ;-(
Help!! if you can. I installed some shorty headers on my 86 F150. I plugged them into my old exaust system.(CAt Backs are comming soon) This truck has passed with a broken exhaust manifold for three years.I replaced all the sensors and check valves too. The guy tht did the test said that my CO was double the legal amount and because I installed headers I changed the dynamics of my Air/Fuel Mixture. Any Ideas on how to recover from this? Adjustment? besides putting the old ones back on. Thanks in advance..
CREEK
CREEK
Senior Member
Joined: Oct 2000
Posts: 364
Likes: 0
From: Houston, Tx.
Hi CREEK!
I am not an expert by any means, but IMHO the headers should have no effect upon tail pipe emissions. In fact, I would expect that emissions would be better with headers since they help scavange exhaust from the cylinders which would promote more efficient combustion (i.e. less pollutants). I believe the same can be said for cat back systems. Also, many (most?) of the headers are certified as emissions legal in 50 states and CARB certified as well. At least I know the JBA's are so I am not expecting any problems at inspection time, otherwise I will "blow a gasget".
More likely, I think it is some of the other sensors that are throwing things off as computerized engines are sensitive to changes in them.
GDG
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2001 SuperCrew, Silver, 5.4L, 4x4, 3.55 LS, Tow Package, 265x70x17, Sliding Rear Window, Tuff Spray-on Liner, JBA Headers Jet Black Coated, Ravin Z55 SI/DO Sideswept Catback, K&N FIPK with fabricated cold-air box and ram-air, SuperChip, ASP Pullies, 1" Thick Sheepskin seat covers (nice "seat-of-the-pants" feel!), Nerf Bars, PIAA Superwhites, 65W (9006) Fog Lights, Dual 14" Perma-Cool Fans w/ stock shroud,
Future mods - Baumann Shift Kit, Roots Supercharger, various Auto Meter guages, modified sterio system
I am not an expert by any means, but IMHO the headers should have no effect upon tail pipe emissions. In fact, I would expect that emissions would be better with headers since they help scavange exhaust from the cylinders which would promote more efficient combustion (i.e. less pollutants). I believe the same can be said for cat back systems. Also, many (most?) of the headers are certified as emissions legal in 50 states and CARB certified as well. At least I know the JBA's are so I am not expecting any problems at inspection time, otherwise I will "blow a gasget".
More likely, I think it is some of the other sensors that are throwing things off as computerized engines are sensitive to changes in them.
GDG
------------------
2001 SuperCrew, Silver, 5.4L, 4x4, 3.55 LS, Tow Package, 265x70x17, Sliding Rear Window, Tuff Spray-on Liner, JBA Headers Jet Black Coated, Ravin Z55 SI/DO Sideswept Catback, K&N FIPK with fabricated cold-air box and ram-air, SuperChip, ASP Pullies, 1" Thick Sheepskin seat covers (nice "seat-of-the-pants" feel!), Nerf Bars, PIAA Superwhites, 65W (9006) Fog Lights, Dual 14" Perma-Cool Fans w/ stock shroud,
Future mods - Baumann Shift Kit, Roots Supercharger, various Auto Meter guages, modified sterio system
Senior Member
Joined: Jul 2000
Posts: 5,116
Likes: 3
From: Houston, by way of every major city in America.
I'm with GoDog,
It sounds like one of the sensors are bad,unplugged by accident,or something. You might even check the EGR valve and other related emissions parts..... I bought a $50(cheap) code reader at Autozone, and it really helped out on the 86 E-150 I have. It could be the catalytic convertor has gone bad,too. Buy a code reader,just an opinion,,,,,98
------------------
98 F-150 4.6 Litre XLT2wd Ext. cab
Yokahama AVS/ST's,,Junk
prarie tan/tan int.
K/N gen.II fipk
custom dual exh/gibson rectangle tips/rear exiting.
color matched snuglid
Superchip!!!
Clear front corners
Stillen Quad light air dam,Sweet!!
Euro taillights
Cobra 75WXST cb w/weather alert
Kenwood cd w/Radio Shack speakers,and Soundstream P203e amplifier//Single 10" sub
Viper alarm
On the way/wheels,tires, etc..etc.......
the monochromatic boogie is done,cool!.
Come see my new pictures@ www.my-f150.com
officialtomwaits.com
reverendhortonheat.com
WOW,what a cool site!
FENDER GUITARS ROCK!!!
[This message has been edited by 98SCREAMER (edited 04-01-2001).]
It sounds like one of the sensors are bad,unplugged by accident,or something. You might even check the EGR valve and other related emissions parts..... I bought a $50(cheap) code reader at Autozone, and it really helped out on the 86 E-150 I have. It could be the catalytic convertor has gone bad,too. Buy a code reader,just an opinion,,,,,98
------------------
98 F-150 4.6 Litre XLT2wd Ext. cab
Yokahama AVS/ST's,,Junk
prarie tan/tan int.
K/N gen.II fipk
custom dual exh/gibson rectangle tips/rear exiting.
color matched snuglid
Superchip!!!
Clear front corners
Stillen Quad light air dam,Sweet!!
Euro taillights
Cobra 75WXST cb w/weather alert
Kenwood cd w/Radio Shack speakers,and Soundstream P203e amplifier//Single 10" sub
Viper alarm
On the way/wheels,tires, etc..etc.......
the monochromatic boogie is done,cool!.
Come see my new pictures@ www.my-f150.com
officialtomwaits.com
reverendhortonheat.com
WOW,what a cool site!
FENDER GUITARS ROCK!!!
[This message has been edited by 98SCREAMER (edited 04-01-2001).]