R34 Not Starting With Nistune Ecu. Not Priming The Pump

[Chris32]

Bought a secondhand Nistune the other week.

Plugged it in the other day and had the map adjusted etc, all works well.

However, it's failed to start twice so far! When you turn the key to start, it cranks but doesn't fire. The fuel line doesn't pressurise, and it won't start.

The first few times, turning the key back a turn and then trying again resulted in the fuel pump coming up to pressure and starting no problems. This morning after 20 mins stuffing about I put the stock ecu in, and it fired first crank.

Is this a setting problem within the Nistune or a problem with the ecu?

Plugging the Nistune back in once it cranked over resulted in it firing first go too - which confuses me!

[XGTRX]

Ever since I got a halech same. I just pause it to give it a chance to prime and then start it.

[Chris32]

It's really weird! I HAVE to turn the car onto Acc then back it off, put the key back in then turn to Acc again and I can hear it prime, then I fires first crank

I guess it's a handy security feature!

[Chris32]

Been in touch with Nistune, its a known issue with a batch of the boards they used in the R34 ecu, and they will repair it for me. Hopefully that fixes it

[Chris32]

All sorted, took 5 mins to reprogram one of the chips.

Great service, considering it was a second hand unit. Big thumbs up to Nistune