Hi i have a AVC-R boost controller installed with a Jwt stage 1 remap.

My question is should these connectors be connected or not? See pics. They were both disconnected. What happened was the car would get to about 4000rpm on full throtle and then it would missfire pop and bang and all that when i looked under the bonnet i saw them disconnected and re connected them. Since then it has been fine but i think they are ment to be disconnected. If they should be disconnected has anybody got any ideas what could be causing the problem after 4000rpm?

Here are the pics

Yes they should be disconnected when fitting a boost controller - they are the connectors for the stock boost solenoids and will cause problems if left connected with an EBC ;)

do you know what would be causing the missfire then?

too high boost blowing out the spark on the avcr, try making the gap a bit smaller

once these are disconnected though you lose safety boost control, so beware

too high boost blowing out the spark on the avcr, try making the gap a bit smaller

 

Sorry mate i have no idea what you mean?

If it helps it does it in setting A setting B and even when its off

so it does it when the avcr is off but when the solenoids are connected it doesnt?

so it does it when the avcr is off but when the solenoids are connected it doesnt?

 

Yep. I cant work it out

it seems to be more drivable since i connected the two plugs

can you run them connected if you have a boost controller to give you the safety boost safteynet or is it incompatible or other issues when you have a boost controller.

can you run them connected if you have a boost controller to give you the safety boost safteynet or is it incompatible or other issues when you have a boost controller.

 

I would like to know that too. As my car is running much better with them connected.

the solenoid from the avcr will try to control boost as will the oem ones so you will get some conflict

how will that show up mate?

The stock solenoids open up a bleed valve to increase the boost from 7psi to 9.5psi once the engine is warmed up. Having a bleed valve in the circuit will make it very difficult for the EBC to control the boost pressure, if at all...

where is the bleed valve located andy, im wondering if all the problems people are having with the avcr's and boost controllers could be down to this item, causing the boost spikes and all.

Next to the boost solenoids basically. There is a T-piece in the vac signal line to the actuators which then goes to the solenoids. From there, there is then a restrictor before it connects onto the turbo inlet elbow...

One of my mates at work said to fit a fuel cut defender and that would sort it out. Is this right and what do they do (how do they work)?

fuel cut defenders basically are a way stopping boost control which earths out the injectors to stop fuel delivery, the z does not use this way , well the pressure this happens is silly high i believe, from my delve into maps.No you do not need these

FCDs are BAD!!! Very bad! They basically 'clamp' the MAS voltage so the ECU doesn't see the extra airflow - therefore it doesn't fuel for it...

right , repipe your actuator pressure supply from the avcr actuator to the wastegate and see if it still happens, im gonna bet it doesnt, as you will have removed everything the solenoids affect.Im taking a guess that you joined the new pipe to the old close to the original take off.If it goes when your solenoids are connected up its saying these connectors are having an affect on boost control so pipe the avcr with totally new piping to remove the items the solenoids control letting the avcr do its job.

remember there are 2 actuators

Thanks guys i wont bother with one of them then. Back to the drawing board then. God knows what the problem could be. :(

try what i said

right , repipe your actuator pressure supply from the avcr actuator to the wastegate and see if it still happens, im gonna bet it doesnt, as you will have removed everything the solenoids affect.Im taking a guess that you joined the new pipe to the old close to the original take off.If it goes when your solenoids are connected up its saying these connectors are having an affect on boost control so pipe the avcr with totally new piping to remove the items the solenoids control letting the avcr do its job.

 

 

I have no idea how it was fitted mate as it was on the car when i bought it.

I know nothing about boost controllers so most of that went over my head :confused: lol

Look at instructions 19 and 20

 

http://www.twinturbo.net/ttnettech/avcr/avcr.html

Look at instructions 19 and 20

 

http://www.twinturbo.net/ttnettech/avcr/avcr.html

 

 

Cool thanks for that i will take a look at the weekend