Guest Jason1 Posted June 15, 2014 Share Posted June 15, 2014 Hi I have now fitted a AVCR to my car and just wanted to get it all setup for 1bar. However I cannot control the boost, I just hit fuel cut no matter what the settings. The head unit shows all the correct readings and I am convinced the hoses are correct. If I lower the duty it is the same, so everything low still the same. Turn the unit off and still the same.. Very confusing this,, would this be a solenoid problem? I cannot here it ticking which my last unit did Any help guys? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 15, 2014 Share Posted June 15, 2014 Does it work OK when you take the solenoid out? What boost level are you hitting with it on? Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 15, 2014 Share Posted June 15, 2014 Hi Yes with it all plumbed in and on lowest setting Fuel Cut every,time cant tell what boost as just cuts the car but hits 1.2 pretty quick lol Even with the unit set to off it is the same. If I put the boost hoses back I get .9bar as this is what the car does anyway I haven't tried connecting it up and the unplugging the solenoid, would this be ok to do? Any help would be great as at the minute it is just a very expensive boost gauge Quote Link to comment Share on other sites More sharing options...
Scott Posted June 15, 2014 Share Posted June 15, 2014 Are you sure you are wiring and plumbing it in correctly? I would try it without the solenoid connected. Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 15, 2014 Share Posted June 15, 2014 I think so I followed the instructions to the letter The head unit gives all the correct readings and sensor checks shows the rpm throttle and boost no problem so I am happy with that. I also plumbed in according to the manual and capped off the vsv and lower wastegate ports So I think it is all ok, Would I cause damage with the solenoid disconnect? Or would it just run spring pressure? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 15, 2014 Share Posted June 15, 2014 I think so I followed the instructions to the letter The head unit gives all the correct readings and sensor checks shows the rpm throttle and boost no problem so I am happy with that. I also plumbed in according to the manual and capped off the vsv and lower wastegate ports So I think it is all ok, Would I cause damage with the solenoid disconnect? Or would it just run spring pressure? Take a picture of how you have the solenoid connected Quote Link to comment Share on other sites More sharing options...
mellonman Posted June 16, 2014 Share Posted June 16, 2014 as scott suspects i believe you have the vac pipe on solinoid point , i think with the stock set up you need the n/c pipe, but please be aware that the avcr will give you 20% more boost then you have as stock so you may still hit fuel cut , but with the avcr switched off you should see stock boost again but a little lower Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 16, 2014 Share Posted June 16, 2014 Sorted ish I had the NC pipe fitted instead of the No or ON depending on which way you look at it. Sort of setting it up now and I have a steady 1bar apart from 3rd gear which spikes hits FCD and then sits at 1bar Duty cycle is set as low as it will go at 20 so I am hoping that it will go into self learn mode and sort itself out in the next couple of days. Thanks Quote Link to comment Share on other sites More sharing options...
mellonman Posted June 17, 2014 Share Posted June 17, 2014 it wont go lower then 20 mate but you may be able to set the , start duty down into -6 (example) for 3rd gear and this may stop the spike have you done the gear learn and all the other setting up bits Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 21, 2014 Share Posted June 21, 2014 Hi thanks for the help. However this is what I have discovered. The car at 20% Duty would hold 1Bar except in third where I would hit fuel cut. So I turned the unit to off and low and behold I discovered the car (according to the AVCR) held 1Bar anyway in all gears no problem My car is BPU with a 1Bar restrictor ring and so I thought perhaps the unit when on would struggle keeping the car at what it already produces. And so I left the unit off and concentrated and getting all the other settings right, Gears etc. This is the confusing bit. I have now changed all the hoses on the car for silicone ones, as the ones fitted to the car were tired(silicone also) I have replaced like for like sizes etc, apart from the hoses to the AVCR solenoid, I did these with 5mm id hose. The one for the AVCR boost sensor is 3mm id the same for the map sensor etc, Since I have done this, I turned the unit to on and it boosted low .9bar So I have put in target boost to 1Bar and had to raise the duty to 47% to get the car to boost to 1Bar. Why would this be? Would the 5mm hose tot he solenoid be wrong? Although the car boosts up sooner and seems to run ok, and there is the shove at 4k it doesn't feel as tight as it was before Any ides on this? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 21, 2014 Share Posted June 21, 2014 Larger ID means a couple of things. 1... More chance of leaks, the increased ID means less of a seal on the mating port. If this happened, you would have a boost leak and need more WG control to keep pressure. 2... More volume to fill. The increased ID means more volume of air is required to fill the hose space. In this instance the increased time would allow the solenoid more time to react. Fractions of a second, but that's all that it would take really. My money would be on reason 1, but reason 2 is feasible. Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 21, 2014 Share Posted June 21, 2014 I have sealed the hoses (zip tied) I used the 5mm hose as the solenoid has large barbs and so the 3mm would be really tight to get on The one for the boost sensor is smaller and so I used the 3mm and this is the same as the other hoses from the intake. Does anyone know the correct id hose size for the AVCR? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 21, 2014 Share Posted June 21, 2014 The one that's tight to get on and doesn't need zip ties to hold it on Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 21, 2014 Share Posted June 21, 2014 Cheers I shall have another go tomorrow Will post up the findings Thanks Quote Link to comment Share on other sites More sharing options...
mellonman Posted June 22, 2014 Share Posted June 22, 2014 Also with the new pipe fitted you may have corrected a vac leak that was acting like a bleed valve / boost controller by leaking the wastegate preasure, iirc my avcr was around 47% duty for 1.2 , but alot depends on exhaust flow Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 22, 2014 Share Posted June 22, 2014 That's true Did yours pull strong or felt a little flat? Don't get me wrong the car shifts, but just doesn't feel 100% compared to what it did Oh I see of course if it was bleeding boost then it would feel different Quote Link to comment Share on other sites More sharing options...
mellonman Posted June 22, 2014 Share Posted June 22, 2014 Mine felt amazing with it on, and flat with it off, You need to get a new fuel pump and fcd and go full bpu dude Quote Link to comment Share on other sites More sharing options...
Guest Jason1 Posted June 23, 2014 Share Posted June 23, 2014 Sorted I have dropped the id of the hose to the avcr solenoid to 4mm Also changed the NE points back to were they were so not ignoring the 4000rpm mark And hey presto it hits a rock steady 1 BAR in all gears and it has now gone into self learn mode Pulls like a train and I am happy with it Hopefully it will now sort itself out. I agree though I need a FCD already have a pump fitted 255lph one so should be ok. Quote Link to comment Share on other sites More sharing options...
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