300 tdi power chip

hifly · Sep 9, 2012

DISCOVERY1-DAZ said:
I'm going to try this with ebay items:
290664304328
120931701136
130680753015

Just need to find the wires to bridge with the circuit now.....

Daz

the wires yiou want go to the ecu behind the side panel in the drivers footwell/under the steering wheel and they are red & green/pink

DEFENDER90-DAZ · Sep 9, 2012

Cheers mate i'll have a look

Do you think the ebay items will do the trick?

Daz

hifly · Sep 9, 2012

looks like they will be ok

Diesel Do · Sep 9, 2012

hifly said:
http://www.landyzone.co.uk/lz/f8/tuning-chip-300tdi-edc-discovery-189249-2.html

post #18, this post was last updated yesterday, so you did not have far too look for it and no i won't come round and do it for you

Yeah thanks I'd already found that

question is, is it adjustable enough to keep smoke acceptable and not blow anything up! Or is it all or nothing?

DD

DEFENDER90-DAZ · Sep 9, 2012

With the adjustable 1k ohm pot it will be adjustable i think.
What i'll do it mount the pot and switch in the small box and using my multimeter mark on the box the different settings ie: 1k ohm/900 ohms/800 ohms etc...............
So i can tweak it while i'm driving/testing to find the best improvement without smoke setting

Daz

hifly · Sep 9, 2012

if you are going to be using it while towing up hill i would advise a egt gauge.

DEFENDER90-DAZ · Sep 9, 2012

I'll only be towing a small trailer with quad on it - now and again so should be ok.
Will be able to switch it on and off too.

Daz

Diesel Do · Sep 9, 2012

My customer tows big trailers a lot!

think I may give it a go but set it really low and don't tell him it's adjustable

DD

Sheeprus · Sep 10, 2012

DISCOVERY1-DAZ said:
I'm going to try this with ebay items:
290664304328
120931701136
130680753015

Just need to find the wires to bridge with the circuit now.....

Daz

Daz,
Can you post photo's when you do? I'd be keen to see how it;s done.

Cheers

Chris

DEFENDER90-DAZ · Sep 10, 2012

Yep should be able to do that mate - will be easy enough to wire up the box.
Could do a step by step "how to" - still waiting for the bits to arrive

Daz

DEFENDER90-DAZ · Sep 11, 2012

The bits arrived from ebay so i've made up the box and will fit it later

The good thing about the 1k ohm pot i bought is that the thumb adjuster is removable - so set it to where you want it power wise and remove the adjuster so it can't be altered/knocked

Here are some pics:

DEFENDER90-DAZ · Sep 12, 2012

Thats the box fitted bridged across the red, green/pink wires.
I accessed the ecu wiring loom by removing the black panel above the pedals (there is a black corrogated pipe to protect the loom) Bared the wires (red and green/pink) and soldered the 2 wires from the box - 1 to each wire.
With the black box mounted on the dash next to the drivers door i can operate the switch easily to "turn on/off" the tuning box.
I started by warming up the engine and turned the 1k resistor pot fully clockwise (1k ohm) and slowly turned it anti-clockwise (reducing the resistance) until the idle started to become lumpy. I then turned the thumb adjuster clockwise until the idle was smooth again.
Took it for a test drive and it does make a difference!
Checked that there was no smoke screen on harsh acceleration or kickdown - sorted!
Removed the thumb adjuster and turned the box "off"

Daz

StuRox · Sep 12, 2012

Good work - how much difference would you say?

Also, my only concerns when messing with the ECU is what potential danger or stress will this put on an already old and possibly worn engine tho?

I am always interested in more power, but also need to consider the downsides if any...

DEFENDER90-DAZ · Sep 12, 2012

Hi Stu its a good mod for a small price, the thing i like about it is you can switch it on and off. I'll probably only use it for hills as my disco pulls well enough as it is.
Downsides - as hifly said "you might melt something"
The guys with the normal injection pumps have tweaked them and i haven't heard anything bad about that?

Daz

StuRox · Sep 12, 2012

yeah, that's what I was thinking with having a switch - just there for 'now and then use'.....just don't like the thought of melting something on my daily runner

DEFENDER90-DAZ · Sep 12, 2012

Yep i liked the idea of switching it on and off - the guys that have their ecu modded can't do that

Daz

StuRox · Sep 12, 2012

yeah, but when you have a complete remap or new chip, a lot more work has gone into making sure everything works as it should rather than banging in a couple of quid resistor.....

StuRox · Sep 12, 2012

Don't get me wrong, certainly not against this, or remaps/chips, as I have done plenty cars in the past - even had variable tuning boxes on my other diesel cars, but they were a lot newer, and just worried about the old girl and what could go wrong, as you have a hard enough job fixing the everyday jobs

DEFENDER90-DAZ · Sep 12, 2012

Easy solution then mate - don't bother.

Daz

StuRox · Sep 12, 2012

now where is the fun in that

300 tdi power chip

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