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Author: Subject: ST170 on original ECU - lambda and cat required?
hughpinder

posted on 1/11/17 at 09:33 AM Reply With Quote
ST170 on original ECU - lambda and cat required?

Hello once again!

The project car I have started has a ST170 engine. I intend to get it running using the standard ECU/PATS and have those parts.

I don't have the exhaust or lambda sensors. My question is do I need the cat and lambda sensor to pass the IVA? I don't have donor information so it will be a Q plate registration.
I have seen some forums where people decat their cars and bypass the lambdas, so I don't believe there is a big issue with running the engine that way, although it may prevent the ECU from self tuning?

Any thoughts much appreciated!
Regards
Hugh

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big_wasa

posted on 1/11/17 at 09:39 AM Reply With Quote
Yes and yes.

Pre cat O2 is use for closed loop running ie every thing part throttle once warmed up. Post cat 02 is there to check on the cat.

There are ways to fool the post O2 that the cat is there and good when its not but you would need the cat for iva a anyway.

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big_wasa

posted on 1/11/17 at 09:41 AM Reply With Quote
For the oem ecu to function as intended you need all the basic sensors from the st.
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hughpinder

posted on 1/11/17 at 09:48 AM Reply With Quote
Thanks big_wasa
I haven't sorted through the box of bits/the engine itself yet - think I have the bulk of the sensors, but no exhaust/manifold so obviously no lambdas or cat.
Thanks for your previous work documenting what all the pins on the ECU do. It is that that has inspired me to take this route!
It'll probably be a couple of months before I get to the point of actually wiring everything up, just trying to get a list of what to buy at the moment.
Regards
Hugh

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big_wasa

posted on 1/11/17 at 09:55 AM Reply With Quote
Let me know what your short of as i am having a clear out over / after Xmas.

I don't have oany blacktop/ st 2 sensors but I do have some odds and sods to uncover.

I've nearly finished the turbo zetec with focus rs ecu. I've yet to start the st220 on oem ecu then that's it for the foreseeable.

Clear out time.



[Edited on 1/11/17 by big_wasa]

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hughpinder

posted on 1/11/17 at 10:00 AM Reply With Quote
Thanks for that, I am sure there will be some bits I'm missing (but I have a standard zetec so may be able to salvage a few bits from that).
Regards
Hugh

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Ugg10

posted on 1/11/17 at 10:14 AM Reply With Quote
quote:
Originally posted by big_wasa

. I've yet to start the st220 on oem ecu then that's it for the foreseeable.

[Edited on 1/11/17 by big_wasa]


Was hoping you were going to have a go at getting the 1.6 ecoboost going on oem stuff, that would be really interesting for quite a few people I think. Looks like the next favourite kit car engine but currently ECU's to run the GDI are expensive.





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1968 Ford Anglia 105e, 1.7 Zetec SE, Mk2 Escort Workd Cup front end, 5 link rear
Build Blog - http://Anglia1968.weebly.com

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big_wasa

posted on 1/11/17 at 12:03 PM Reply With Quote
Never say never
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