TunerPro User Forum

Dear friend, no doubt that 413 is better and faster but 402 ECU is easier to tune, but for the mechanics, the non vanos heads are stronger and tend to sustain lot of abuse, trust me i have tried both and nothing works like non vanos heads. If you have a vanos head on hand dont go buy a non vanos 1 ...

last week my lambda broke,now my AFR is very rich in idlle and part throttle map.i found another lambda map it is 1x6 7952 adres i droped all the values to 0 now i have full control on iddle fuel and part throttle maps but a made shortcut to lambda signal betwen pin 70 and 71 try it Oldman Thanks G...

Hi aboutton Seeing your post, brings up a question: many people are telling me the #413 ECU got faster processor and a lot more definitions can be tuned than the #402, and 95% of people I know are suggesting conversion to Vanos. I insisted in sticking with the non Vanos due to the suggetion from one...

Then I have misunderstood!
In that case, the wiring harness and MAF got to be replace,
might as well I convert it to a Vanos engine
when you unplug the vanos solenoid, the ECU will run on "retarded" maps

There is a reason why I kept the non-Vanos engine.

How can that be done?
Iy would be interesting for a non-Vanos engine to run with #413 ECU
Can you please tell me how?

"thedean" Thanks for your concern, the 402 403 ECU are for Non-Vanos engine and are different from 413 I have tried on #413 ECUs and they can be tuned much easier. no matter how I adjust the fuel maps, the ECU adaption will fix the AFR acording O2 sensor feed back to its Lambda Target AFR ...

The problem is: 1. where to turn off the O2 sensor/Lambda Circuit?Gavin's method was not right, diagnosis tool shows O2 sensor is still at work! 2. Turning off the O2 sensor to tune is the right way to do, but for this situation, After O2 sensor turns back on, the ECU adaption gets in and fix the fu...

When you disconnect the O2 sensor, it only keeps the Lambda circuit open, then the ECU will give full fuel all of the time which gives a vrey rich burn. I think I have found problem with mine, I am not sure if I am right, but this is what I think: the origianl ECU is to be run on a 2.5L engine, now ...

For all you guys that have a problem with adaptation on 402 i there is not one but 4 lambda maps i drop values in all off them to 0 and now i have perfect AFR on WOT first map is 1x6 7888 second one is 1x6 7896 third one is 1x4 78a2 forth is 1x4 78ac I have tried that, and ECU adaption still get in...