Ok as you guys know im in safety boost..............

 

Cant find a boost leek anywhere and used the proper tool to test.

 

Water temp and det sensors are fine,

 

All clean on the conzult (thanks topless)

 

Tried a spare ECU and had the same problem so not that (thanks andyP)

 

So...Checked the plugs for the boost solenoids and theres NO voltage to them at all, tried with the engine idling too!!!!!

 

Does this mean theres a prob in my loom somewhere????????????

IIRC the boost solenoids only get power to put you in safety boost.

So is it right that there's no power???? Bit worried about this tbh

Forgot to say, when i tested for voltage the meter registered a circuit but no voltage

I would have thought it's the other way round, they only receive power when the conditions are met go into extended boost.

I would have thought it's the other way round, they only receive power when the conditions are met go into extended boost.

 

Yep, I'd go with that since disconnecting them will put you in safety mode it has to be that they receive power for extended(normal) boost, and no power for safety.

 

Did you check for Error codes after taking the car for a drive (and getting into positive boost) and without switching of the ignition ?

I have done previously but not yesterday. There are no faults logged

This might clear it up!

http://www.300zx.co.uk/tech/manual/manual/efec/032.gif

Thanks Manta, Its gone a bit over my head but i think i get it. Do these solenoids or the wastegate valves show up on a datascan?? As they aren't on the conzult?

 

Also does anyone know where the throttle sensor is located, would be worth testing the voltage

 

Oh, and i use high octain fuel

Thanks Manta, Its gone a bit over my head but i think i get it. Do these solenoids or the wastegate valves show up on a datascan?? As they aren't on the conzult?

 

Also does anyone know where the throttle sensor is located, would be worth testing the voltage

 

Oh, and i use high octain fuel

Yes, Datascan shows Wastege solenoids....and Throttle sensor (TPS) voltage.

 

TPS is the little black box about size of a small box of matches on the side of Passenger side throttle body.

Solenoids may well be called BSCV (Boost Solenoid Control Valve), they are displayed on a TechTom, don't recollect where they are in a ConZult but must be there somewhere.

They are shown in the conzult software as "W/G CONT S/V"

Ok great. Time for another conzult check.

i could do with another conzult check. Do you and Topless fancy another mini-meet in Putney again this week?

by the way, it's not uncommon for the circuitry inside the ECU, controlling the WG/Boost solenoids, to blow up.

 

But I noticed you already tried another ECU.

 

you could put a multimeter on pin 45 & pin 25 of the ECU and see if you get a signal there (while driving)

by the way, it's not uncommon for the circuitry inside the ECU, controlling the WG/Boost solenoids, to blow up.

 

But I noticed you already tried another ECU.

 

you could put a multimeter on pin 45 & pin 25 of the ECU and see if you get a signal there (while driving)

 

Eric,

Does that same circuitry exist in an NA ECU ?

Was it an NA ecu i tested???

> Does that same circuitry exist in an NA ECU ?

 

Not sure, I still need/want to try this sometime, but I have a strong feeling it will have the circuitry.

This because the NA code contains the routine to control WG solenoids...it's just not used.

 

I compared the hardware of quite a few Z32 ECU's and it looks like there are basically 2 different models.

For the early models, the AT ECU has a few extra (SMD) parts, mainly resistors, compared to the MT ECU.

All later 8-bit models (from around '93 onwards) appear exactly the same and look exactly the same as the early AT ECU models (with the extra resistors).

Also for the later MT models, the code does contain routines to control the ATCU, but it's not used (just like the WG code in the NA ECU).

So I wouldn't be surprised that all post '93 ECU's (and pre '93 AT ECU's) are interchangable between NA/TT/MT/AT, as long as you put in the correct chip for the car.

 

All this would make sense, because it's no use to produce several different ECU's, when you can control and/or enable extra features within the code.

Give me a shout I am around if you want another conzult, price is one pint of stella per reading :D

that sounds a very resonable price. Will a packet of peanuts buy me a bit of advice if my readings are off?

Any evenning this week is fine for me apart from tonight cos my mate is bringing his new alfa round to show me!

Sweet, sounds good to me!

> Does that same circuitry exist in an NA ECU ?

 

Not sure, I still need/want to try this sometime, but I have a strong feeling it will have the circuitry.

This because the NA code contains the routine to control WG solenoids...it's just not used.

 

I compared the hardware of quite a few Z32 ECU's and it looks like there are basically 2 different models.

For the early models, the AT ECU has a few extra (SMD) parts, mainly resistors, compared to the MT ECU.

All later 8-bit models (from around '93 onwards) appear exactly the same and look exactly the same as the early AT ECU models (with the extra resistors).

Also for the later MT models, the code does contain routines to control the ATCU, but it's not used (just like the WG code in the NA ECU).

So I wouldn't be surprised that all post '93 ECU's (and pre '93 AT ECU's) are interchangable between NA/TT/MT/AT, as long as you put in the correct chip for the car.

 

All this would make sense, because it's no use to produce several different ECU's, when you can control and/or enable extra features within the code.

 

Post '93 also dropped the AIV IIRC so the drive circuitry for that would most likely be missing also....

>> Post '93 also dropped the AIV IIRC so the drive circuitry for that would most likely be missing also....

 

also for this: the code is there, even for models that no longer have the AIV solenoids, so I presume the circuitry on the ECU is there also.

Crotchrocket has no power to the boost solenoids, he wants to up the boost and I suggested a boost controller. Would there be any consequences on the ecu side of things if it recognises the boost solenoids are not acitve?

no, won't have any consequences

whoohoo!!!!!!!!!!