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ok iv put a stock 25det into a r32 when driveing around works mint revs up does what a 25det does,

but when drifting usen hard revs it misfire cuts power drops revs to 6000rpm

any body know the proplem dosent feel like a coil or afm proplem feels like a fuel cut

i have no speedo hooked up some one told me it could be the proplem going into a over rev fault code

has any one got experience with this its the 2nd 25 to 32 that has done this both with no speedo's fix the last one with a tune

any help will be appreciated

iv still got to hook up a consult port and i brought a greddy intelligent infometer i hope this could help me find the proplem

at the moment my plan of attack is to loop the neutral switch put in a 25 speed senser run the output to the ecu

i dont want to get a tune because motor is getting pulled out in afew weeks to make room for a 250rwkw sr20det

You cannot run the speed sensor direct to the ECU. The speed sensor outputs an AC signal at +/-1V or thereabouts. The speedo head converts that to a 0-5V square wave signal, which is what the ECU is looking for.

The very simple solution, as it always has been, it to fit a bloody speedo.

No. Don't piss about. Just get an R33 speedo out of a wreck, wire it to the box and the ECU, tuck it up under the dash and be happy.

As for Paul, the R34 ECU definitely has a bunch of zero speed protections built in. Looking at the stock manual bin file in Nistune, max RPM with zero speed is 4500. Map TP with zero speed is 96. It is fair to bet that Nissan had similar protections in the R33 ECU too, it's just that we can't go look inside so easily.

I don't think they do have no problems. I think they run into the exact problem you have. If you use a PowerFC or other ECU then no problem.

With respect to cutting pin 53......there may be a difference between having no signal there at all (not even the circuit connected) and having it connected but not pulsing. The ECU may be able to tell the difference. I don't know with R33 ECUs particularly, because they are useless in all regards I've never been in a car that has one!

If you want to use a cable drive speedo with R33 box in R32 you're going to need to use the Navara drive mod to make it work. I did it to mine, it's not hard, although the speedo cable ends up with a nasty short radius curve in it down near the box/chassis rail afterwards.

Edited by GTSBoy

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