WHAT might cause a HIGH smog-test, for CO,that's 2.7, but Cailf-limit is 1.0 ??

10

Asked by Jan 27, 2017 at 01:13 AM about the 1988 Toyota Pickup 2 Dr STD Extended Cab LB

Question type: Maintenance & Repair

2 Answers

85,905

Running too lean.

5,895

I'd look at the choke/thermo-time switch never getting activated...something in the recipe is putting the whole show out of mix...any number of ingredients can throw it off..might even be the EGR valve or vacuum supply to any of the valves...go with nitrile tubing (like BMW's use) instead of butyl-rubber~ look for a line off or dry and cracked would be a start~

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