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Old Nov 26, 2023 | 09:33 AM
  #51 (permalink)  
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zip439
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Joined: Jul 2010
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From: SE Alabama
Default Re: Help diagnose intermittent rough running

Originally Posted by svtmerc
The secondary air system appears to be operating. I know the blower kicked on and i know the air valves work, i sucked on the vacuum end and plugged it on both and confirmed that the valves both operate correctly. I cannot confirm much about the evap though. Not sure how to go about testing that.
Normally the vap system will set DTC of their own. But give it a test yourself by disconnecting the vacuum lines at the valve and do a suck/pressure test of your own. Check the valve itself as it can leak internally.

In a earlier post you asked about the suffix numbers on the DTC. They came about in 2013 with enhanced info. Thing is I'm not sure if our older cars using CANBUS will give the correct suffix numbers. ASK YOUR FRIEND AT THE SHOP IF THOSE SUFFIX NUMBERS CAN BE RELIED ON IN OUR OLDER CARS AND WHAT THEY MEAN. Sorry I can't interpret the numbers shown in your post as they do not fit the info I have.
 
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