New ECU and loom

Well it's been a crap season so far because of a high end misfire. I'd like to say I traced it and eliminated it but I never managed to find it. Luke at Enhanced Performance's original diagnosis was fuel starvation. That diagnosis resulted in the fuel system being rebuilt. A pointless trip to Snetterton proved Luke's diagnosis wrong. So back it went to Enhanced Performance for more diagnosis.

Luke, to his credit, does not like to be beaten by a misfire on a Cosworth. And probably felt a bit embarrassed about failing to find the problem the first time. With room for a bit of negotiation on price we talked about the need to run a proper ECU and new wiring loom. The original Weber ECU and Ford engine loom were pretty ragged and as they are renown for causing problems on the Cosworth we decided to get rid of it all.

Luke is a big fan of the Gotech ECUs so recommended a Pro X. The Pro X comes with a loom which was covered in a protective braid and installed.

The Pro X has a lot of features that we're not using on the Cosworth. It offers easy control of all the parameters and allows a tuner to map the car with ease. It will allow data logging but mostly it is simple, reliable, easy to control and should prove to be a good solution to the original Weber ECU. My only issue with the Gotech ECU is that its connectors are cheap plastic PC power supply multi-plugs. It doesn't look too robust. Luke has good experiences with Gotech whose customer service is apparently very good.

Luke spent time with the car on the rolling road using a laptop to do the set-up. And just when he had the car running well and seemed happy with the performance the engine gave out a massive rattle, it was switched off and a failed big end was diagnosed. More on that in the next post.

Here's the ECU and a screenshot showing the Windows front end: