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1988 Ford Ranger Failed California Smog Check

Tiny
WCHILDRESS
  • MEMBER
  • 1988 FORD RANGER
  • 4 CYL
  • 2WD
  • MANUAL
  • 158,000 MILES
I have a 1988 Ford Ranger that failed Smog. It failed for high NOX and also for a leak in the evap system. I am going to change the EGR valve to fix the high NOX. However, I'm not sure about the leak in the evap system. Should I change the gas cap? Is there a simple test to find where I might have a leak? Any help would be greatly appreciated.
Thanks
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Saturday, December 27th, 2008 AT 11:22 AM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Only test you can do is a smoke test or a vaccum test on the system. But you cant do that without the proper tools.

Only other option is replace the gas cap and replace all the vaccum lines. The hole could be the size of a needle head and cause that code to show up.
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Sunday, December 28th, 2008 AT 11:09 AM

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