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Discussion Starter #1
Hi,
I understood that the LTFT will go down gradually if you increase RPMs. This would be an indicator of a vacuum leak. I’ve been looking for vacuum leak on my car recently, the LTFT are at 32% at idle but when a give it 2000-3000 RPMs it will instantly go down to -3%. Any idea why?
Thanks
 

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Discussion Starter #3
I smoke tested the intake, spayed brake cleaner and propane everywhere. Everything seems nice and tight.
 

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05 camry 07 tacoma
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2,496 Posts
Could be drawing air thru the brake cylinder vacuum hose( disconnect plug to test) same test for purge valve.
No other error codes?
 
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