Tourque on dyno all over the place...

[Viewfromtheback]

Not sure how this looks as apposed to regular....

I have headers, ais, dual foam filters, staight pipes, exhaust, short gears and some other engine mods..... car is super lean untill 5k (no cats, v tech is what sends the car into the rich side) mid range is all over the place....

I have replaced the fuel reg, injectors, stock chip, cleaned the filters, compression tested ok, and the fuel pump should be ok since the fuel regulator was replaced and pressure tested as well...

o2 sensors are 1 year old..... car runs rough at idle and I KNOW I lost power...

any ideas?????

 

[NetViper]

Wow. That dyno doesn't even look like a NSX dyno.

 

[da3dalus]

did you just take that one run, or did numerous pulls have the same result?

 

[ncdogdoc]

I would still look at your fuel pump and or the high pressure resistor in series with the pump. You obviously are not getting fuel when the ECU is asking for it.

 

[Elite]

Did you change your fuel filter?

 

[C-speed]

I would still look at your fuel pump and or the high pressure resistor in series with the pump. You obviously are not getting fuel when the ECU is asking for it.

I doubt it has anything to do with fuel as you can see on the dyno graph that the A/F is well into the 12's during that RPM range.

Peak torque is right where the area you're having the issue. I would look at your spark plugs (bad plugs or incorrectly gapped plugs) or ignitors (weak).

It also looks (from the way that chart is) that it could be a slipping clutch, again caused during peak torque.

HTH

 

[simonprelude]

For comparison here is the plot I had done last Saturday on a totally standard 1997 NA2 3.2 NSX.