No Injector Pulse When Hot

[newcastler32]

As stated have no injector pulse if car is driven till normal operating temp. After turning car off car will just crank, has great spark but no injector pulse. Cold start perfect, never cuts out once running.

Background info: r32 has just gone major heart transplant from rb20 to rb25/30 with highmount gt3082, front facing plenum, gtr injectors and resistor pack (which i have changed back to standard) + nistune. Absolutely hauls arse.... but pull into servo to fill up and have to wait 15mins or so before it will fire back into life.

I had the nistune board installed by electronic repair man who had never done this before which is where i believe the problem may lie. Has anyone had anything like this happen before???

Any feedback much appreciated, thanks in advance.

[JonnoHR31]

check the cranking fuel tables if you have access to the software and cable.

[DVS JEZ]

How did u verify no injector pulse when cranking?

Might be fuel pressure or tune related

[rob82]

Is the ECU requesting a pulse?

[Adriano]

Im assuming it has spark. I would send the ecu back, they will have it tested in a day or so, just had one fail which was nistune fitted, ended up being a crack in a track.

[newcastler32]

Checked with noid light on injector plug. Definately has fuel pressure. Has power to one side of the injectors. Has good spark on crank.

[bubba]

So you're not running the resistor pack?

Could the drivers be getting hot and crapping out?

[Rolls]

no resistor pack will burn out the injector drivers, why did you remove it?

assuming rb20 ecu + nistune?

[rob82]

Checked with noid light on injector plug. Definately has fuel pressure. Has power to one side of the injectors. Has good spark on crank.

You really need to get data and check what your hot cranking on time is. To me it sounds software related - ie an incorrectly calibrated table. If you send me the bin image I can have a look for you.

[newcastler32]

sorry guys should have been clearer. WAS running gtr injectors with resistor pack, but thinking this was the problem i removed the resistor pack and re-installed standard injectors. I since have reverted back to stock as a rock rb20 tune and the hot start problem still remains. NO injector pulse at all, but good spark.

[Adriano]

Can you try a stock ecu?

[newcastler32]

Thanks for replies, that will be my next step (a stock ecu). Anyone have a stock r32 rb20det computer that they wanna sell me?

[DVS JEZ]

Thanks for replies, that will be my next step (a stock ecu). Anyone have a stock r32 rb20det computer that they wanna sell me?

I have one for a cefiro rb20 you can buy. Pm me if it keen