98 s70 t5, ECU question.

chepada · Post by **chepada** » 28 Oct 2012, 14:13

Car runs great, it has a problem with EVAP system ,after many test suspected ECU may be the problem,swap engine ECU with one of the same car model year and part number, car still runs great but it does not complete drive cycle yet after of about a month of driving the car, what could be the problem?

Post by **Ozark Lee** » 28 Oct 2012, 16:56

Getting the readiness monitors to set is a real challenge on the Motronic systems.

Pull the battery battery cable and start at zero again. After everything is reset to factory default, follow the drive cycle instructions listed in this link.

https://www.matthewsvolvosite.com/forums ... 6234#56234

...Lee

chepada · Post by **chepada** » 28 Oct 2012, 18:00

Thanks so much, I will try.

Post by **BEJinFbk** » 28 Oct 2012, 22:33

And it still may not reset...I tried a number of times.
Check with your local emissions program office if it doesn't.
The guys here said "Oh - One of those. Here's your waiver."