Do MINES ECUs have a safety map?

 

Reason I'm asking is that my car only seems to be devloping 5psi boost of late.

 

If they do, I figured I'd try the 1M resistor trick to see if that sorts it before I start looking for a boost leak.

 

So can anyone point me to a 'how to' to do the Det sensor short please?

 

TIA

Should have safety boost all the same, so, dett sensor or its a boost leak.

Should have safety boost all the same, so, dett sensor or its a boost leak.

 

Cool, thanks.

 

So how do I do the resistor trick? Seems a quick way to determine if it's one or t'other.

Does the mines ecu still check for engine faults? if so do a self diagnostic, if something comes up then you can narrow it down, from memory a code 34 is a detonation sensor.

 

If you get no code it's mechanical.

 

I'd be more inclined to boost leak check first rather than go mucking with your det sensor. it is there for a reason.

Cool, thanks.

 

So how do I do the resistor trick? Seems a quick way to determine if it's one or t'other.

 

http://zhome.com/ZCMnL/PICS/detonationSensor/detonationSensor.html

 

;)

Ta much!

my mines ECU has diagnostics, are you going by the stock boost gauge or aftermarket? Safety boost is 7 PSI...

my mines ECU has diagnostics, are you going by the stock boost gauge or aftermarket? Safety boost is 7 PSI...

 

Safety boost is 5...

Apologies it's 6psi on the stock wastegate springs.

that's what I meant :innocent:

atmospheric pressure is 6psi.....just saying....

Stock JDM guage. It used to read 7 on hard acceleration. I know stock guages aren't the best but it's certainly noticeably down on 'oomph'.

 

I've recently had someone attempt to replace the heater matrix so I'm thinking that some fiddling in/around the det' sensor connector may have disconnected/broken it in some way.

 

Thanks a mill' for the replies.

atmospheric pressure is 6psi.....just saying....

 

atmospheric pressure is actually 14.69 psi.Air enters all n/a engines at atmospheric pressure.

on turbo or supercharged engines intake pressure over and above the 14.69psi figure is called boost pressure. :)

atmospheric pressure is actually 14.69 psi.Air enters all n/a engines at atmospheric pressure.

on turbo or supercharged engines intake pressure over and above the 14.69psi figure is called boost pressure. :)

 

I don't even know where to start on how wrong that is.

I don't even know where to start on how wrong that is.

 

how so mate?

In laymans terms you are right, in technical terms you are wrong and i really cant be arsed explaining the principles of the internal combustion engine to you.

good job i was only talking in laymans terms then wasnt it ;)

 

As for explaining the principles of internal combustion engines to me...i spent 10 years assembling CV12 Challenger tank, CV8 Warrior, and Eagle 12litre straight six truck engines for Perkins Engines(UK) Ltd and can rebuild Ford 2.0 Pinto and Vauxhall/GM V6 engines in my sleep! :)

I find that very hard to believe, i want to see a video of you assembling an engine in your sleep. ^_^

I find that very hard to believe, i want to see a video of you assembling an engine in your sleep. ^_^

 

ok ok, you know what i mean LOL!

 

just getting across i know my way round an engine.

Well, I was always under the impression that air was sucked into N/A engines at less that atmospheric pressure hence how you get vacuum assisted brakes.

 

On that subject, out of curiosity, how're the brakes assisted on a supercharged engine? Is there some sort of reservoir that's 'charged' when the engine's 'off boost'?

Oh dear...

 

dill you're good at laymans terms you field this.

ah, see - you need to say if you are talking absolute pressure or gauge pressure here ;)

Oh dear...

 

dill you're good at laymans terms you field this.

 

getting old now so when i learn something new it pushes the old stuff out :wheelchair:

Oh dear...

 

Now, there's no need for that!! LOL

getting old now so when i learn something new it pushes the old stuff out :wheelchair:

 

 

 

:stupid:

 

FINE... lol

 

The supercharger is forcing the air into the engine like a turbo, the vacuum assis to the brake boost still works fine as do any other vacuum lines as the air is still going into the engine, just with more pressure.

 

In laymans terms of course

i should suffice it with this...

 

when the engine is "off boost" the engine is still sucking air just as a n/a engine would. think of forced induction as supplementary air. the engine is still sucking that air in (not quite as much due to lower compression)