Hey guys like the title says the miatas power doesn’t change or gain after 5k. On the dyno we tried changing spark plugs tightening the gap checking all vacuum changing the coils changed timing added fuel removed fuel but all to no luck. Here is the picture of the dyno graph of what is happening it doesn’t die out it just runs at 13 afr but doesn’t gain no power whatsoever any help or suggestions are needed. Right now I’m thinking about trying to barrow a ms3 and see if that changes anything.

 

Oh yeah, that's definitely your battery crapping out. I'd replace it ASAP.

If you want help post details about the car, post the tune, post a log, etc...

If it runs at 13 AFR maybe you're out of injector or pump, but nobody knows what you have, so how can we tell?

 

oops I have 1200cc fms injectors and a hellcat 525 fuel pump it’s running on e85 battery is almost new no issues with it not holding charge or being dead. Even when I’m 5k-6k it still reads that afr is okay. I would figure if pump or injector went out it would throw off the afr enough to notice. I’ll get a log and the tube posted asap.

 

The battery thing was a joke emphasizing there was nothing to go off of... I'd assume your battery is fine.

The way I read it you said AFR was stuck at 13 which might fly if this isn't turbo'd... which is another question. Is this turbo'd and what is the setup? I have to assume it does have a turbo with 1200cc injectors.

Is this an NA, NB, VVT, etc...?

 

I thought I put it in the post but oops was just on my profile. It is a nb 2000 1.8 with a vvt head on it timing is set dead on single turbo pulsar with a kraken top mount exhaust manifold externally Wastegated with the 1200cc injectors on e85

 

Post the tune and a datalog