Intermittent loss of power part 2

[Evil02outback]

after solving the knock sensor issue with the last post I made, http://www.ultimatesubaru.org/forum/topic/164225-intermittent-loss-of-power/?do=findComment&comment=1364460, it is losing power differently this time .

my wife has been driving it and it  would never fault on me until one late night making a run to the store,

i was driving up a fairly steep hill and going up at about 40 it held there for around 5-6 seconds and like a switch it comes alive and 

takes off up the hill. 

i kinda have an idea where to look but could use some input 

it also occasionally dies on start up but you fire it up again and is just fine 

[1 Lucky Texan]

have you checked trans fluid level? ATF is the only fluid you must check while idling.

 

any CEL? you might scan for pending codes.

[Evil02outback]

Oh yes that was the first thing I checked I know it has a slow leak in the trans but the fluid was full.

And the code it has thrown is the p0066 air injection voltage low

[Fairtax4me]

Air injection solenoid is that dohickie with the two hoses bolted to the front of the #1 intake runner. Might be unplugged.

 

Power for that comes from the main relay. Check at the connector for 12v. Ground goes straight to the ECU.

 

ECU controls opening/closing of the valve during certain RPM ranges and throttle. It should be closed at idle. If it's stuck partly open it creates a vacuum leak.

 

Check for any other loose or split vacuum hoses and breather/PCV hoses.

 

What kind of knock sensor did you install? The Cheapo eBay sensors sometimes cause problems.

Edited September 30, 2017 by Fairtax4me