Just brought my self a g reg series 2, now iv been told its got the wrong ecu on it. i was told it should have and ecu with hearts and diamonds on it, mine has the coloured squares on it. i was told that that ecu is from a series 1 is this right and will it make a difference?

 

blue red blue is a common s1 ecu, it wont matter either way what you have, i found a box with 15 rs ecu's in the yesterday,


some peopl3 say a series 1 is best ecu as it allowed 1psi more and had no knock sensor, i may be wrong but i think you have to disconnect the knock also otherwise it was im permenent knock/safe mode

i could be talking crap its been a very very long time sice i used kejetronic stuff

 

i always thought they were all the same but, 2day i was told that my car wont run right with that ecu on ?

 

as i say^^

they are not identical

 

I was also told the S1 ecu was better for above reasons. they also have a higher rev limit i believe. An S2 will run on any Ecu, but an S1 will only run on an S1 ecu.

 

How's it goin Rob? From the factory it should have a hearts and diamonds ecu. They will run slightly more boost than the earlier coloured ecus. I think most are interchangeable tbh, just check your base idle and ignition timing.

 

Later ECU's need a knock sensor, or will run like a bag of shit. S1 or V early S2 is the best as no knock sensor, the knock sensor circuit very often removed timing for fun.

 

I dont really know enough about it to be honest, just what i was told when i had mine set up. my engine is a late MFI (has CPS hole in block) and that runs on an S1 ECU with knock sensor disconnected.

 

So then if my knock sensor it pluged in unplug it, get her set up and it should b beter.

 

Nice 1 peeps

 

after pissin around for ages with no joy trying 2 get my car running better im back to the ecu, mine is a blue, red, black. Which is for series 2s with a knock sensor (late 89s and early 90s) from what ive found out on here. but my knock sensor is not pluged in. could this be the problem? Thanks Rob.

 

nope tryd it today lol