HKS F Con - remap or ditch?

[James]

Hi all,

 

I have the HKS F Con (unsure the exact variant) and need to do some data logging based on a dyno run yesterday showing a really bizarre AFR:

 

Just curious as to how easy it is to actually access the HKS ECU? By the time all is said and done in terms of getting the car logged, travel, adjusting map etc. I’m starting to immediately wonder whether I’d be better off just putting my money towards a Syvecs and be done with it.

 

Thoughts welcomed either way; and incidentally if anyone has seen anything like that AFR graph before then please chime in!

 

Thanks folks.

[mattdavies]

If you take a look on 1jzMerc there is information on identification. 

Ultimately its not a bad ECU but depends on local tuners you trust, you can get a Link Kurofune that will plug into your current HKS loom 

[Mike2JZ]

HKS FCON is a capable ECU, problem is that is getting a bit dated.

Interfacing with the ECU can be troublesome because:

a) It uses a serial connector, so hopefully you have a laptop with a serial port, or a good serial to USB converter. 

b) HKS only distributed tuning software to their approved dealers. So a lot of software that is out there has been cracked and/or is a dodgy copy. There are different HKS software available for different HKS hardware, so you need to find someone who has the right software for your hardwire. Advisable that you use a genuine HKS dealer if possible. 

c) Some older HKS ecu, I think under version 3.0 are japanese only and the software was next to impossible to use and find over here, so hopefully you don't have a really old ecu. 

 

Your AFR going lean like that could be the map itself not having enough fuel commanded in that area or you could have a mechanical issue like fuel pressure dropping. Or could be how they were measuring lambda on the dyno, could be inaccurate. Hard to say without more info.