Hello, I fitted an electronic boost controller today but forgot to disconnect the standard boost solenoid connectors, doh!

 

I drove the car trying to set it up and got all kinds of crazy readings.

 

I went home and realised what i had done and disconnected both connectors.

 

But now im getting 7-7.5psi only.

 

Any ideas?

 

And chance i could have set of the knock sensor when i was getting crazy boost?

Would a knock sensor issue allow safety boost with a boost controller fitted?

Disconnect the battery to reset the ecu? Don't know if this will work but worth a try.

are you 100% you have your boost controller pipes on correctly with all the t-peices?

Do you mean the highest it'll go to is 7.5 psi?

 

You negate safety boost when you disconnect the solenoids, the ECU has no control over turbo pressure anymore and you're relying on the fact that EBC is reading correctly and the settings aren't extreme.

 

That's roughly 0.5 bar, might not be the same thing but i had a boost leak and a dodgy actuator not seating correctly that produced those same results.

yep, just checked everything.

 

Also did some research, the car should pull 7-9psi without any interaction from the boost controller anyway so i doubt its safety boost.

 

also tried changing around the hoses on the solenoid, actuator and wastegate hoses, it then pulled upto 12psi with interaction of the boost controller but it quickly drops to 7-8psi.

 

But ive swapped them back now as it was definately setup right the first time.

yep, just checked everything.

 

Also did some research, the car should pull 7-9psi without any interaction from the boost controller anyway so i doubt its safety boost.

 

also tried changing around the hoses on the solenoid, actuator and wastegate hoses, it then pulled upto 12psi with interaction of the boost controller but it quickly drops to 7-8psi.

 

But ive swapped them back now as it was definately setup right the first time.

 

It'll only be applying spring pressure if the feed from the intercooler is not connected to the solenoid right (about 5-6psi), iirc t25's have a normally open actuator that closes up the wastegate as boost increases, the pulsing is controlled by the ECU via the factory solenoids so that it can close off and regulate the feed from the intercooler pipe work at a particular boost level which would be about 9psi, in "safety boost" the ECU just closes the solenoid so the actuator is just sitting on the spring pressure.

 

If you've got everything bob on, first thing to rule out is a boost leak.

If that's fine, check to make sure you've got power to the solenoid, stupid but i did that first time round.

 

Next would be to route your pipe work directly to your actuators and go out for a blast, if you get high pressure then that means there's nought wrong with the EBC, you have a good sealed system and it's to do with your solenoid. Above is not regulated and it will just keep boosting until something gives up though so be careful!

 

If you don't, you could have a lazy spring on one or possibly both of your actuators meaning the actuators are not fully closing up at higher boost levels.

 

HTH, if not i'll surup! lol

Edited March 11, 200916 yr by stenorth
punctuation, English is not my strong point!

The solenoid works because with the pipes the otherway around i can control boost (to an extent) and it clicks when given power.

 

The only other idea i can think of is lazy actuators like you say, although its doubtfull to be honest, this engine is like brand new, all the pipes are still soft, none of the connectors have any corrosion and the actuators havent even started browning yet.

 

Hmmm

The solenoid works because with the pipes the otherway around i can control boost (to an extent) and it clicks when given power.

 

The only other idea i can think of is lazy actuators like you say, although its doubtfull to be honest, this engine is like brand new, all the pipes are still soft, none of the connectors have any corrosion and the actuators havent even started browning yet.

 

Hmmm

 

Cool the solenoid sounds like its working. You said you made 12 psi, then it quickly dropped off, was that smooth and did it dropp off at higher revs rapidly?

very very fast, but if i came off boost and had another go it would hit 12ish again.

very very fast, but if i came off boost and had another go it would hit 12ish again.

 

That sounds like there isnt any problems, you just need to have a play with the settings to get it setup right.

 

I'll have a quick look to remind myself but sounds like its oscillating at higher revs, the gain might be too high?

sounds as if you spiking, possibly due to the boost controller setup? have you tried playing with settings to see if that helps?

What ebc is it btw?

now this is the thing, its a HDI SBC-D boost controller imported from australia.

 

I went for this one as i have used them several times before and there easy of use and stable boost is brilliant.

Normally they stay at the boost you set without any play whatsoever.

 

Note the HDI SBC-D doesn't use greedy style settings, its a fire and forget type controller, one turny knob to higher lower boost. (two settings Low and Hi)

 

Its also hard wired to a HDI SBG-D boost gauge so the boost reading is bob on

now this is the thing, its a HDI SBC-D boost controller imported from australia.

 

I went for this one as i have used them several times before and there easy of use and stable boost is brilliant.

Normally they stay at the boost you set without any play whatsoever.

 

Note the HDI SBC-D doesn't use greedy style settings, its a fire and forget type controller, one turny knob to higher lower boost. (two settings Low and Hi)

 

Its also hard wired to a HDI SBG-D boost gauge so the boost reading is bob on

 

I'm going keep quiet then as i've not played with those before.

 

It doesn't sound from the description you've given that the boost is being applied to consistenly but if there's no adjustment with them, you're kind of screwed!! :mac1:

wierd eh?

 

I will figure it out mate no worries, it'll be something silly, always is.

 

Tar bud.

wierd eh?

 

I will figure it out mate no worries, it'll be something silly, always is.

 

Tar bud.

 

Yeh, let me know when you find out!

Sorted, the boost solenoid live wire was split about 3mm from the casing, so ive solder it as best as i can and taped the wires back, it now controls boost!

 

Its not as steady at high boost as they have been in the past, possibly something to do with it being a twin turbo?

Sorted, the boost solenoid live wire was split about 3mm from the casing, so ive solder it as best as i can and taped the wires back, it now controls boost!

 

Its not as steady at high boost as they have been in the past, possibly something to do with it being a twin turbo?

 

Sweet, that'd explain it been intermittent.

 

Could be mate, i know they balance but thats not going to equalize the pressure seen by the solenoid compared to the feed to the controller, might be enough of a difference to upset it a little.

 

I've started on looking at that fueling problem today, waiting on a pressure gauge now.

you sure you disconnected the right connectors?

yep jim the black rectangular ones.

 

Its all sorted now, on a regular analogue gauge it would read just under 1 bar, or 14psi, but because its super accurate it moves around a little from 13.6 to 14.3, its nothing at all to worry about.

 

Have you ordered a wide band? because i had a glowshift A/F gauge and it played around with the o2 sensor signal and gave duff readings.

yep jim the black rectangular ones.

 

Its all sorted now, on a regular analogue gauge it would read just under 1 bar, or 14psi, but because its super accurate it moves around a little from 13.6 to 14.3, its nothing at all to worry about.

 

Have you ordered a wide band? because i had a glowshift A/F gauge and it played around with the o2 sensor signal and gave duff readings.

 

Ive had a wideband for some time now mate. Another sensor has buggard but i got a new one to fit once i figure out why it keeps failing.

Ive had a wideband for some time now mate. Another sensor has buggard but i got a new one to fit once i figure out why it keeps failing.

 

They don't like it if the exhaust gas has a lot of hydrocarbons in, if you run rich it buggers them up!