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[Robski]

Hi all does anybody know what or where the intergrators are on a 2.5 V6,are they something in the ecu?
I have been told the intergrators have a fault but not a clue what they are on about.
Thanks

[Robski]

Nobody any ideas then?
Could it be a fault within the ECU?
If I was to change the ECU,could I just put a new ECU with the same part number in or would it have to be programmed via tech 2?

[hotel21]

Integrators? New term to me, I'm afraid.....   

[Robski]

Integrators? New term to me, I'm afraid.....   

And me Brucie whats happening on live data is one of the o2 sensors is flatlining at 154 whilst the other is around the 128/130 mark,Daz has changed the o2 sensors still no difference.We did live data at Captain Zoks,and it shows "intergrators".Whats the possibility of the ECU having a fault,if so could it be changed like for like or would I need tech2.

[Elite Pete]

If you replace the ECU Rob, you will have to change the transponder and chip in your key as well.

[Robski]

If you replace the ECU Rob, you will have to change the transponder and chip in your key as well.

So I would need tech 2 then?

[Elite Pete]

No, just a matching ECU, transponder and chip from the same car. Markie Mark has some for £35 delivered

[Kevin Wood]

Integrator is a term for the mathematical algorithm used to calculate the fuel trim required based on the inputs from the lambda sensors. It's implemented in code within the ECU as I can't see any prospect of it going faulty. If the engine runs OK you can be sure your ECU is OK.

I have seen the fuel trim pegging at 154 at idle before. Could be the result of a slightly lazy lambda sensor, sticking EGR valve, vacuum leak into that bank via the breather system or an air leak in the plenum / manifold.

Might also be worth considering the exhaust system up to the lambda sensor - leaking manifold gaskets perhaps, or air getting in via the SAI pipework?

If the bank goes back into closed-loop, the lamba sensor voltage starts cycling and fuel trim stabilises when the engine is held at a fast idle (2000-2500 RPM) there's certainly nothing wrong with lambda sensors or the ECU.

Kevin

[jonathanh]

Nobody any ideas then?
Could it be a fault within the ECU?
If I was to change the ECU,could I just put a new ECU with the same part number in or would it have to be programmed via tech 2?

TBH the first step is to ask the person who told you this for much more background.  Why they think the 'integrator'  is at fault, what the fault is, how it has been diagnosed.  Any further clues for us all would help a lot