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Old 02-21-2014, 07:06 PM   #1
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Headlight wiring harness

Wondering if anyone can help me with identifying the plugs on the headlight harness? I have the ones for all the lights ok but there's a few that plug into boxes I know there are airbag sensors but there's one behind the passenger side headlight I have no idea what it is... Any help would be great thanks
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Old 02-21-2014, 08:35 PM   #2
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I'll assume it's a 90 and later since you mentioned air bag sensors?
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Old 02-21-2014, 09:02 PM   #3
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Yes sorry it's a 91 gt
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Old 02-22-2014, 09:13 AM   #4
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Hopefully this will help ?
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Old 02-22-2014, 11:08 AM   #5
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Awesome thank you so much not sure what c122 and other numbers are in there but should be ok. If I deleted the smog pump I should be able to do away with the thermactor air diverter and bypass solenoids correct?
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Old 02-22-2014, 11:25 AM   #6
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C101, C121, C122 are connector location from one wiring harness to another.
Yes if you delete your smog pump you can get rid of the Air Diverter, Air Bypass and all the other smog related parts. Just make sure you cap/plug any vacuum lines

When you delete your smog pump without the extra air, the catalytic converters will clog and fail.
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Old 02-22-2014, 12:51 PM   #7
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I don't have cats so no worries there, have a 76mm calibrated maf and 70mm tb should I keep egr stuff or is there no real gains vs mpg by deleting it?
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Old 02-22-2014, 01:30 PM   #8
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EGR is for emissions control and fuel economy so you won't pick up any additional mileage by eliminating it.
I've read many times that you can remove the EGR simply by unplugging it and blocking the EGR port down at the cylinder head, or at the upper and lower intake. You will get a CEL however because code 33 will trip the light. DO NOT install resistors. You want the CEL to tell the ECU to disable the EGR function. If you trick the computer into thinking the EGR is in place and functional, you may find you run lean at part throttle cruise. Not something you want. Proper way to then tune it out is to get a custom tune that turns off the EGR function permanently. Then, you install the resistors to turn off the CEL.
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Old 02-22-2014, 01:36 PM   #9
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I have a bama chip but I think I'm going to just leave the egr for a little better gas economy I've read the gains aren't anything either way so might as well leave it, you wouldn't happen to have a diagram with the vacuum lines would you
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Old 02-22-2014, 01:41 PM   #10
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Which vacuum lines diagram are you looking for?
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Old 02-22-2014, 01:46 PM   #11
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Not sure I'm still working the harness but know imma have to do that next and was looking to get a jump start lol the engine was pulled and completely overhauled so I've got a lot of work ahead of me and being my first build I'm learning as I go so thank you for you advice
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Old 02-22-2014, 01:50 PM   #12
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I got some that deal with Emissions, under the intake, Heat and A/C and general vacuum lines if that will help?
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Old 02-22-2014, 01:51 PM   #13
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Anything will help no big rush but thank you
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Old 02-22-2014, 01:57 PM   #14
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Do you still have the stock intake ?
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Old 02-22-2014, 02:00 PM   #15
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Yes I do but I'm not using it have an aftermarket chrome one with 70mm tb
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Old 02-22-2014, 02:01 PM   #16
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You should have a PM .
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Old 02-22-2014, 02:22 PM   #17
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Quote:
Originally Posted by busaboy View Post
Yes I do but I'm not using it have an aftermarket chrome one with 70mm tb
You have a chrome intake, I'd love to see it if possible.
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Old 02-22-2014, 05:26 PM   #18
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Chrome intake

Chrome intake
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Old 02-22-2014, 09:25 PM   #19
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Unless I'm looking at something wrong that seems to be a stock polished ( not chromed) upper intake.
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Old 02-23-2014, 09:56 AM   #20
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I don't know it's how I purchased it could be
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Old 02-23-2014, 10:36 AM   #21
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I've done a little polishing and that's why I'm saying it looks polished rather that chromed.
Just some of the things I've polished.
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Old 02-23-2014, 03:05 PM   #22
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Nice it takes a lot of patience and skill for that lol wish I could do it, still never got the email
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Old 02-23-2014, 05:29 PM   #23
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I resent you that email.

Polishing isn't that hard to do, the sanding is a pain though.
ultimatefoxbody.com • View topic - Paul\'s Metal Polishing Tips
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