ECU OVER FUELING

caz235

Been having quite a few problems with my Vectra 2.2 SRI 150 2001 recently, my timing chain snapped and my ecu is over fueling, can anyone tell me if I can over ride the ecu fault by adding a performance chip or whether I will have to replace the ecu

vocky

it sounds like the mixture lambda is duff or the air intake sensor wire is broken, personally I would go with the lambda sensor being duff

the mixture lambda is nearest the manifold

caz235

Both lambda sensors have been replaced, the car went into Vauxhall for a thorough going over because of this problem and they tried everything bar replacing the injectors and ecu, i have replaced the injectors but the car is still running as bad

vocky

in that case it's probably cheaper to buy an ecu set off ebay

http://cgi.ebay.co.uk/VAUXHALL-VECTRA-0 ... .m14.l1318

caz235

One last quick question, if I buy one from Ebay does it need to be from the exact same model or will any 2.2 vectra ecu work? and if any will work, will the car it came from had to have had air con etc for all my gadgets to work?

markv

I'm not too familiar with the vectra, but from what I can remember the Tech2 can be used to enable certain features in the car. So if it is just the vectra ECU and the wrong settings are enabled, that can be fixed.

What is important is to get the security code for the immobilizer. If you don't get that you will not be able to program in new keys or remove old ones and it will not be possible to decouple the ecu from the immobilizer.

If you decide to buy an ECU only, so no immobilizer, be sure the ECU is decoupled from the immobilizer it was with in the car they took it from. If it is not, you will not be able to get the immobilzer and ECU to talk to eachoter == unable to start the car.

Mark

caz235

Can this be over ridden by a vauxhall dealership?

markv

caz235 said:
Can this be over ridden by a vauxhall dealership?

You mean when you have an ECU which is not decoupled from the immobilizer? AFAIK there is no way to do this. My vauxhall mechanic confirmed this, you need to have it decoupled, or have to get the immobilizer with correct security code so you can decouple it yourself, or put the set in and reprogram the keys.

Mark

vocky

a good point, make sure you get the code with a new ecu set

all the vecB 2.2's have the same mapping, so the aircon will be fine