Could a vacuum leak cause right bank #1and bank 2 to run lean?

um, wait a minute. running lean and using lots of gas?? Was that a code you got? A scanner could see the oxygen sensor readings and verify the air fuel mixture. No substitute to really see the engine management at work than a scan tool that supports live streaming data from the sensors and switches. Barring that, verify the engine's mechanical condition with a vacuum gauge or a compression tester...and then you start throwing new parts, mostly sensors, at it, hoping you can quickly find the problem, cause it is expensive. I know. um, wait a minute. running lean and using lots of gas?? Was that a code you got? A scanner could see the oxygen sensor readings and verify the air fuel mixture. No substitute to really see the engine management at work than a scan tool that supports live streaming data from the sensors and switches. Barring that, verify the engine's mechanical condition with a vacuum gauge or a compression tester...and then you start throwing new parts, mostly sensors, at it, hoping you can quickly find the problem, cause it is expensive. I know.

I'm long retired, 5 years!, an old hound at do it yourself gear wrenching, lot of cars, farm trucks and machinery, in between stints of steady and not so steady employment. Viet nam era veteran, usaf, (I detest republicans and democrats who sell out.) Ever known a socialist before? Native americans practice to this day a communal identity-that's about as close as you can find to socialism. I believe in socialism. what better for the good of all? Not capitalism, crony capitalism, or whatever they describe our corrupted....so and so. We are becoming enslaved by the richest few of the rich. but to get back to cars and trucks, while oil is cheap, you have a real problem with 4 miles to the gallon. learn all you can about engines and how computers control them. wel good luck. I'm long retired, 5 years!, an old hound at do it yourself gear wrenching, lot of cars, farm trucks and machinery, in between stints of steady and not so steady employment. Viet nam era veteran, usaf, (I detest republicans and democrats who sell out.) Ever known a socialist before? Native americans practice to this day a communal identity-that's about as close as you can find to socialism. I believe in socialism. what better for the good of all? Not capitalism, crony capitalism, or whatever they describe our corrupted....so and so. We are becoming enslaved by the richest few of the rich. but to get back to cars and trucks, while oil is cheap, you have a real problem with 4 miles to the gallon. learn all you can about engines and how computers control them. wel good luck.