Having problems with your Cars & Trucks ?
2002 nissan sentra 1.8l had a po011 code, took a compression check 150lbs in 1 and 4 cylinder and 90 in 2 and 3 cylinder, replaced camshaft and crankshaft sensors. Po001 code did not come back, but po507 came up, checked for vacum leaks(none), cleaned throttle body, checked all connectors(ok), cleared code,code came back, my question is, is this a blown head gasket between 2&3, a bad air volume actuator, a bad intake or? And what procedure(s) should i preform next and how? (I try the idle relear
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