sammyhale30

Ahh that makes sense now. So it just goes down from the throttle body into the left side of the intercooler then from the right side up over the right side of the engine onto the turbo??

Sorry I haven`t been in touch much mate. I`ve just been really busy at work! The piping is probably the same I bet. How long did it take you to fit, do I need to give myself a couple of days for example??

ok I have all the bits now that I need to fit the welly cooler. The only bit I`m not sure about is where the silicone hose routes around the engine bay, should it be obvious? Does anyone have any diagram of how it should all connect together?? Cheers, Samuel

Also if your cutting the crash bar in half, why not just remove it altogether? Surely cutting it in half has compromised the structure of it anyway?? Sam

Just a thought. Is cutting the rest of the bumper out and increasing the gap height really made a difference to the air temp, admittedly it looks sweet but is it a necessary mod for performance? Just wondering if its possible whether the standard hole flows plenty enough air at speed for even the welly intercoolers anyway, without any further modifications?? I might just try running my welly without modifying the bumper first and run some torqueapp tests. The reason being the radiator sits up high also, so the air flowing all around the front of the bumper must be sufficient for that? So is it also sufficient for an intercooler as it's only carrying air, not liquid?? Sam

Yeh I`ve not looked into mine. But mine stopped working all of a sudden. I have a little button near the gear stick and there was a light fitted in one of the blanking plates near the ASR button. Haven`t got a clue where the alarm system is located.

Cloth looks a lil bit grubby. But ok ? http://www.ebay.co.uk/itm/skoda-octavia-VRS-Mark-1-front-car-seats-/151326072136?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item233bbc9d48

Well the car felt completely normal to drive! You wouldn`t have known there was an issue without the emissions test.

Passed Emissions with flying colours today! CO emissions before fitting resistors to SAI, N112 and N249. 1.7 After fitting resistors CO emissions dropped right down to 0.1!! I can safely say that anyone who decides to 'completely' remove the SAI, N112 and N249 must have resistors fitted for the car to run at its optimum and pass emissions tests. I have a sneaky suspicion the removal of the N112(which controls the combi valve) had the biggest involvement with the over fuelling, as my last MOT I had the SAI removed but the N112 and N249 were still fitted and it passed fine. We know that the N249 simply allows the ECU to control the opening of the Recirculation valve. Might be worth making this a sticky because it proves that without a doubt removal of these systems does affect fuelling, especially if the correct resistors are not fitted or the resistors are not fitted at all!

This post on VWvortex backs up the fact that SAI, N112 and N249 delete will affect fuelling if they do not have resistors fitted. http://forums.vwvortex.com/showthread.php?5378678-Car-running-rich-after-SAI-n249-n112-delete So yes if you remove those systems and do not fit any suitable resistors your car will not be fuelling correctly. I`m sure I read somewhere on here if you delete those systems and don`t put resistors in the ECU disables fuel trims and over time this obviously affects fuel/air ratios.

I`ve been reading up and if you have a fooked cat it's normally due to it being blocked up. The main symptom of this is loss of power. I`m not getting any loss of power at all. In fact the car feels perfectly normal and pulls really hard through the revs. I`m going to take it back for its MOT tomorrow to see if it was the SAI/N249 and N112 removal causing the over fuelling issue. My mechanic told me that if it has been over fuelling the Cat might be sooted up quite bad. So I might put some more cataclean through it too and give it another good blast. I`ve also been told if you don`t put a resistor on the N112 the ECU thinks the SAI valve is open permanently and this will cause over fuelling as the ECU is trying to compensate for the extra air that isn`t there!

Do I need one of these ? http://www.ebay.co.uk/itm/Skoda-Octavia-1-8-01-05-Type-Approved-Catalytic-Converter-x1-/141226298858?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3ASkoda%7CCars+Type%3ARS+1.8+T%7CModel%3AOctavia&hash=item20e1be4dea

Ok results the dread engine management light appears to have gone away now! lol However I borrowed a vgate scanner from a mate. I ran engine tests and everything seems ok. BUT When I run readiness test I get a fail on O2 Sensor and Catalyst?? Heated O2 sensor comes back as Pass. I don`t actually know what the readiness test is. But does this mean my O2 sensor and Cat are f00ked??

Yeh I have done this already. I put cataclean through it and gave it one hell of a blast down the motorway before the test. But results were exactly the same as before. I`ve fitted some resistors on the SAI , N249 and N112 connectors and reset the error today. The error was SAI valve open. So hopefully this might help.. My mechanic mate thinks that if the ECU thought the SAI valve was open all the time it might have been over fuelling which caused the high emissions. Only the retest will verify this though.

It failed again today. The MOT guy said when it gets to the 3000rpm mark the CO goes well over the max. It should be 0.9 max but it jumps upto 1.7, 1.8 at 3000rpm. I`ve fitted some resistors today to the SAI and N249 to see if that helps at all..

I had cambelt change in the past month too. Would a cambelt change affect emissions???

Yes I would like a decat but that won`t get me through the MOT..

So are we saying the CAT might be dirty/blocked up or fooked altogether?

yes only fault I get is the secondary air injection fault because I have removed SAI.

I was just looking at my last MOT emissions test and the actual value of CO on the fast idle test was only 0.010! Big difference..

These are the results of MOT: FAST IDLE TEST Passed on HC CO % Max 0.300, Actual 1.749 Fail Lambda Min 0.970, Max 1.030, Actual 1.060 Second Fast idle test CO Actual 1.898 Lambda actual 1.016 Idle test CO Actual 0.223 These results don`t really mean much to me. I`ve recently given it a real good blast with some cataclean as advised by a good mate of mine. I`ve got it booked in Monday for another emissions test and the MOT guy just recommends I give it a real good blast down the motorway and get it nice and hot before the test.

Yeh I`ve recently had a brand new genuine CTS fitted.

Yeh that's true. Do we know what purpose the N112 serves??

Does removing the N249 and N112 and not fitting resistors affect emissions come MOT time? I`m asking because I removed the SAI and the N249 + N112. I know I removed the SAI first and left the other parts on the car for a while. I`ve just had an MOT and my car failed on its MOT. I`m trying to work out whether the N249 and N112 would affect the lambda readings. Last time I had the MOT it passed emissions test but I can`t remember whether I had the N249 and N112 in place for this test. I know for certain the SAI was completely removed.. The only error I get on the ECU is the secondary air injection error and I`ve always had that error.

I have done this on mine, removed the SAI, N249 and N112 and I always get the secondary air injection ecu error. I fitted one of the arcol resistors to my secondary pump connector and still got the CEL light come back. I haven`t fitted resistors to anything else. Is it all in our heads? Fitting resistors to the N249 and N112?? Because my car went through an emissions test and passed its MOT without any resistors fitted. So how can it be affecting fuelling? Don`t get me wrong I would love to get the CEL light to go away on mine because it makes me paranoid. A question for Bowders.. Is there a specific way round the arcol resistor has to be connected to the SAI connector for it to work and the other connectors?? My car did just recently fail emissions test but i'm certain its nothing to do with the removal of these components as my car passed its emissions last time with everything removed.. The new MOT'er I used recently insists it failed emissions though because the CEL light is on lol. I scanned it today using Torque and the only error is the secondary air injection valve failure as usual.