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Just barely failed emissions HC

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Dnix
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Just barely failed emissions HC

Dnix
1986 EFI 302. New, cat converter, plugs, wires, EGR,...... What can I do to help pass by a few?  3.20 min. Mine 4.16.
85lebaront2
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Re: Just barely failed emissions HC

85lebaront2
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This post was updated on .
One I have heard from people I know in CA, fresh oil change, clean or new PCV valve, lean the idle a bit and retry.

Other item that may help, your O2 sensor is at the back of the right exhaust manifold, meaning it only sees 1/2 of the engine. If you can go with a later exhaust system and a heated O2 sensor it will improve the mixture control.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

ckuske
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Re: Just barely failed emissions HC

ckuske
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In reply to this post by Dnix
It might be good to make sure you don't have any codes in the computer as well that could cause emissions problems.  Make sure the engine and the cats are good and hot before it is tested, also.
Chris

'84 F-150 XL 2WD Flareside, 302 w/ AOD transmission, Motorcraft 2150 feedback carb w/ CA Emissions, EEC-IV w/TFI, factory A/C, Tilt Column, Borgeson/Bluetop Steering, Speed Control, 308,000+ miles - Info about me and my truck - My project thread
ArdWrknTrk
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Re: Just barely failed emissions HC

ArdWrknTrk
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In reply to this post by Dnix
Is your truck one of the 302s that have the PCV in the rear driver side single runner?

That can cause detonation in the cylinder and it can also blow all the oil through one piston instead of sharing it amongst all eight.....

The mustang guys have a mod, where are the PCV goes to the plenum instead.

If you get too much oil in one piston it will diesel and break out the top ringland or put a hole in that piston!
 Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.
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