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I have a 1999 Subaru Forester and it will shake then die when coming to a stop. Once the vehicle warms up, it will not reproduce the fault. And it doesn't produce a "check engine" light or a obd code. I also replaced the MAF sensor by the air filter and no change. Help!
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Try unplugging the MAF sensor, the check engine light will come on but the engine should run almost normally. If this is the case replace the MAF sensor. MAF's seldom set fault codes.
I think these codes are indicating a fault with your catalytic converter. The 02 sensors are each not returning the correct values to the ECM, causing a "suspect the 02 sensors" fault code.
It's likely the coil. Subaru issued a TSB (Technical Service Bulletin) on this issue. This is not a recall but you may want to show this to your Subaru mechanic or call Subaru after your repair to try to at least defray some or all of the cost for the repair. The link is below: Subaru Forester Ignition TSB
check for a vac leak around the intake to manfold do this with cab cleaner spray around the intake and look to see if the idel change also check the lower half of the pcv tube hopely this get u going in the right way sounds liike a vac leak some where
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