MAF problem

[4GTSi]

Well my car has been idle funny and also boggs bad under throttle. My wideband just goes to 10 and then as boost goes up it leans out to normal. I checked my codes to see what it was and it came back with P0100 which is volume air flow circuit malfunction and also P1400 and that is the manifold differential pressure sensor circuit malfunction. I checked for boost leaks and it has none and I also replaced the maf with another one and it does the same thing. Anyone have this kind of problem. Also the factory boost gauge no longer works sense this started to happen.

 

[saintsairforce]

Check for broken wires. Sounds like the wires for your boost gauge have a short or open. If this is the case then chances are it is keeping the ECU from working properly and as a result it's calculating the wrogn air to fuel ratio thus bogging the engine down.

Hope this helps,
Ricky

 

[No_Skillz]

How did you check for boost leaks and what pressure did you hold for how long?

 

[4GTSi]

I had a shop test if for me due to lack of time and also the machine they use uses fog to find the leaks. I have been meaning to try and find a wire problem but school is keeping me busy at the moment. I hope to get into the car this week.