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Old 05-09-2014, 06:53 PM
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MDH33 MDH33 is offline
Hard Core 4+
Join Date: Mar 2006
Location: Trapped in a corn field
Posts: 6,448

In addition to what the others have stated, especially testing the Cat, ABV, and timing, it helps to run the tank down low in fuel. That might keep the evap system from dumping the extra fuel vapor into the system. Add the Heet with the tank low. You can also go higher on your idle.

My guess is a weak air pump or bad Cat.

Good luck and post up with what you do and what changes in your readings.

'85 FJ60
'91 Pickup
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