RB25 hesitation at around 5500rpm part or full throttle

[DustinZ]

Like the title says I am getting hesitation at around 5k to 5500. It is a S1 25 in an s13. the last 25 swap ran a rb25 speed sensor but this one runs a z32. Could the speed signal effect the ecu?

DustinZ

[StricNyne]

isnt that within the range of the vtc

[DustinZ]

Everything operates normal and consult shows no codes. There is no speed sensor signal in consult because of the z32 I think. This car I used a z32 tach, speedo, and oil pressure gauge in the cluster and ran a z32 speedo sensor to get the calibration right. The last car I did I used ppm converters and it pulls hard. same wiring????

[DustinZ]

Forgot to mention, She is running rich. Ignition Timing is dead on with fresh plugs, 02 has full sweep on consult, no leaks in ic piping and running a synapse bov recirc. Have no clue where the extra fuel is coming from.

Dustinz

[eh?]

How much psi are you running?

[DustinZ]

It does it on low boost (7psi) and high boost (12psi). There is no change. It is almost like a brick wall. It has the GTS pump and z32 filter. It is the wierdest thing. again no faults from consult. I am about to hook up my wideband and check it.

Dustinz

[eh?]

knock sensors reading good?

[driftingmy240sx]

is the ecm going into the rich and retard mode possibly. my car does the same thing when i romp on it from a roll.

[DustinZ]

It is running real rich. I am not sure if it is retarding timing. I need to hook it back up to consult and check deeper and datalog.

Thanks for everyone looking and thanks for the input. Please keep it coming.

DustinZ