MAF Circuit high
I keep getting a check engine light but can figure out why (MAF Circuit high) on a 2003 miata turbo. Doesnt appear to be ECU replated.
I notice that my car will some times go lean but when i try again i cant get it to do it to recreate the problem. This usually happens above 5K rpms no boost. Also in boost I will have an AFR close to 11.1 but the car will suddenly buck and back fire as if I hit a hard rev limiter. Its random but always happens above 5K rpm. I'm at a total loss. But any time it happens I immediately get a CEL. What i have done that solved a large portion of this issues but did not eliminate it completely. Cleaned the MAF Cleaned out the intake manifold Replaced plugs and wires |
You are getting a high MAF circuit because you have hit 5V on the
MAF output somewhere, sometime. Usually only happens if you are running more than 12 psi though. Stephanie |
Thank you Stephanie,
So the Miata does have a MAF limit? I didn't think of it because I have hit 15 psi before in an accidental boost spike with out any problem. But i was running the xede that lowers the MAF signal. I have read that I didn't need a MAF clamp in a Miata but I will give it a try anyway. Right now I have an occasional rare spike to 12psi, I need to make some adjustments to my boost controller. I might also need to check for boost leaks but dont have the equipment to do it at the moment. |
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