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Hi everyone, I recently cleaned the throttle body on my 2nd gen Rav4 (1AZ-FE 2.0L engine). My car now occasionally hesitates under acceleration, the engine light blinks very rapidly when this happens. This only occurs very rarely, about every hour or so of driving. It also occasionally stalls in reverse at idle. I scanned the car with an obd2 scanner but there are no fault codes to be found.

I originally thought it might have been a vacuum leak due to me not putting the intake back together properly but I have extensively tested and can't find one. So far in search of a fix I have cleaned the MAFS, tested all o2 sensors, did an idle relearn, triple checked all vacuum lines, replaced the air filter and put in new spark plugs. I still haven't been able to solve the issue so I'm wondering if anyone on here might have any insight as to what is wrong.
 
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