Hi guys (& girls),

 

Is there anyone who may be able to lend me the actual control unit for the Profec B spec II?

 

I have already tested the system with a known EBC solenoid but this did not cure the problem.

 

I need to test the actuall control unit I have for strange behaviour before I can rule it out as the cause of the boost problem.

 

Thanks in advance. Mike...

what is the nature of your problem? whats the old girl up to?

what is the nature of your problem? whats the old girl up to?

For everyone's benefit.

 

The problem is the engine can overboost when the EBC is turned on and the engine is up to temperature.

 

I know it is not the settings on the EBC because these have been set by John Dixon, and it worked perfectly for about 6 months (running 16psi).

 

If I run with the EBC off it will sit at 7psi all day long. If I turn it on, even with minimum settings it will overboost and detonate.

 

I have had all the hoses checked and some replaced, I have tried using a known working solenoid and this does not help.

 

I think the problem lies with the actuators/wastegates but I need to rule out the EBC main unit before I pay a mechanic to look around the wastegates.

 

It's all a bit of a shag to be honest!

 

Do you know anyone with a Profe B spec II who might be able to help?

 

Cheers, Mike...

>> I think the problem lies with the actuators/wastegates

 

I don't think so, otherwise it wouldn't be able to boost to a stable 7 psi either

 

Have you checked the small vacuum line to the controller isn't kinked somewhere ?

This isn't uncommon and can cause weird behaviour of the boost controller..

This can cause the controller

>> I think the problem lies with the actuators/wastegates

 

I don't think so, otherwise it wouldn't be able to boost to a stable 7 psi either

 

Have you checked the small vacuum line to the controller isn't kinked somewhere ?

This isn't uncommon and can cause weird behaviour of the boost controller..

This can cause the controller

Thanks Eric, I will have a look when I get a chance...

>> I think the problem lies with the actuators/wastegates

 

I don't think so, otherwise it wouldn't be able to boost to a stable 7 psi either

 

Have you checked the small vacuum line to the controller isn't kinked somewhere ?

This isn't uncommon and can cause weird behaviour of the boost controller..

This can cause the controller

Hi Eric,

 

I have just finished checking all the vacuum lines including the main one runninng through the firewall and into the dash. All are in good condition, they are not kinked or pressed in any way.

 

The reason I think it could be the actuators/wastegates is that after it has been overboosting I can turn off the EBC and it will continue to overboost until the car has cooled down again.

 

Does this make sense? Has anyone got any other ideas?

 

Thanks again, Mike...

The reason I think it could be the actuators/wastegates is that after it has been overboosting I can turn off the EBC and it will continue to overboost until the car has cooled down again.

 

what if you turn the ignition on/off but car is still up to temp?

 

this will tell you if it's electrical or mechanical since switching igntion off should reset all electrics.

what if you turn the ignition on/off but car is still up to temp?

 

this will tell you if it's electrical or mechanical since switching igntion off should reset all electrics.

Yeah tried that.

I have found that turning it all off is not enough to stop it overboosting once it has started. I have to wait until it has cooled down properly (normally overnight) before it stops overboosting.

 

I have an image in my head of the wastegate(s) getting hot and expanding when boosting more than 7psi and then getting stuck in a shut position.

 

I also get a funny noise (like a small bell ringing in the engine bay) when the boost is 0 (i.e. not in vacuum or on boost). could this be the actuator?

 

This still does not explain why it will overboost if the EBC is on even when the EBC settings are set to zero.

 

Apart from trying a spare EBC unit I don't know what else to try! HELP! Aaarrgh...

come on guys someone must have a profec b spec II that they could lend me for an hour or so?

 

PLEASE!

hi mate. I have a profec b spec II that i would be happy to let you use but not really sure what part it is you need.

hi mate. I have a profec b spec II that i would be happy to let you use but not really sure what part it is you need.

Oh Tom, that is great news.

 

It is the main control unit (the bit that lights up with knobs and buttons! lol) that I need.

 

I just need to try swapping mine for a known working one to see if that makes any difference. Will only need it for about half an hour.

 

If it is OK with you, you can post it to my work address. All that means is that you will be running around at 7psi until you put it back in your car.

 

Alternatively, we could meet up somewhere.

 

Whatever is easiest for you.

 

Thanks again...

Oh Tom, that is great news.

 

It is the main control unit (the bit that lights up with knobs and buttons! lol) that I need.

 

I just need to try swapping mine for a known working one to see if that makes any difference. Will only need it for about half an hour.

 

If it is OK with you, you can post it to my work address. All that means is that you will be running around at 7psi until you put it back in your car.

 

Alternatively, we could meet up somewhere.

 

Whatever is easiest for you.

 

Thanks again...

 

 

Give me a call over the weekend mate. Might be easier if you call over and try it out rather than finding packaging, posting and posting back because i really need it back for next weekend.

Give me a call over the weekend mate. Might be easier if you call over and try it out rather than finding packaging, posting and posting back because i really need it back for next weekend.

I am away for nearly all of the weekend but maybe we could meet up on Sunday? at the Ace cafe or similar?

 

I have your number and will give you a bell.

 

Thanks again mate...