Pajero Owners Club of South Africa

Hoe veilig is jou engine met 'n Dastek Unichip ?

Ek het 'n Gen4 3.2 Di-D met 70 000km op die clock, toe ek die voertuig gekoop het het hy 'n Dastek Unichip in gehad en ek moet herken die krag was baie lekker en dit was vir my asof die voertuig met so 1 km op 'n liter ligter was op brandstof.

Maar wat my bekomerd maak is ek het al stories gehoor, ook by ons local shop wat diesel pompe doen dat die chip glad nie goed is vir jou engine nie. Soos wat ek verstaan is die pistons geneig om hair cracks te kry wat dan veroorsaak dat jy een of ander tyd 'n gat in die piston kan brand, hoe vêr dit waar is weet ek nie.

Wat ek wel ondervind het was dat nadat ek my Paj gestart het en weg trek was daar 'n baie geringe flat spot op die engine met die eerste weg trek, daarna was alles weer normaal tot dat jy hom weer af gesit het en weer gestart het. Die flat spot was baie gering en vorentoe het jy dit amper nie op gelet nie want dit was amper soos 'n gear shift maar in reverse het jy dit duidelik gevoel.

Ek het die chip toe laat uit haal, volgens die local dyno shop plug hy net uit en dan is die voertuig weer terug op std, dit is ook wat hy gedoen het. Die flatspot is ook volgens hom nie normaal nie en hy skryf dit toe aan swak programering van die ouens wat die chip in gesit het.

So nou is die chip uit en die flatspot weg maar ek sal nie omgee om weer daai krag te gehad het nie, dit was darem lekker veral as jy 'n lang ry voetuie moet verby gaan.

So nou is my vraag, is dit gesond vir jou engine om 'n chip te hê of nie, ek het ook al op gelet dat voertuie met 'n chip geneig is om bietjie swart te rook wat vir my sê over fueling wat wel hair cracks kan veroorsaak op die pistons maar tog lyk dit vir my asof die brandstof verbruik ietwat beter is wat weer vir my sê daar is nie overfueling nie.

a chip that's tuned can be a fantastic thing if done correctly but the engine must be in 100% working order with proper oil, filters and keep to the service intervals.

On top of that I would ALWAYS accompany a chip with a reliable EGT gauge.

Maar as mens so baie voorsorg maatreels moet tref vir 'n chip sit hy mos meer stress as normaal op jou engine, of is ek verkeerd.

I bought my gen 3 with the Dastek chip, was installed by first owner when she was new, now have 170k km on and no indication of problems.
She is a heavy drinker but that might be due to the short running distances.
Gear changes when you gun her not very smooth, feels like a serious flat spot just before the change happens, but this is my first diesel auto so maybe that is just how it is.
I do feel that she has to much punch in to a short rev range which makes offroading tricky at times and I suspect this is due to the chip, still want to unplug it and see how she behaves then.
But pulling power is great and I have to keep an eye on my use of the loud pedal otherwise the rear BFGs chirp when the power kicks in.
On gravel in 4H and flooring - great fun (i only do this on good gravel roads).

If you look at any TD engine, you have to admit the following.
The power delivery is governed by:

1. Cubic capacity
2. Turbo boost
3. Compression ratio (which acts with the turbo boost)
4. Injector timing
5. Valve timing
6. Air intake
7. Volume of fuel injected (per stroke) which effects the fuel-air ratio
8. Scavenging of the combusted gasses (via the exhaust system)
9. Engine temperature
10. General design features (all TDs of the same capacity don't deliver the same output)

(what did I miss?)

If you want to increase the power delivery, you have to change some / all of the above.
Now go figure which of these the chip can alter (electronically)?

The obvious one is the fuel delivery under different conditions.

IMHO that is all most chips do - over fuel the engine.
The revised 'map' might result in better overall fuel consumption (giving more/less power under some conditions), but that does not say that under certain conditions, the engine is not over fueled.

MHO - use it or ignore it.

4ePajero, dit is hoe ek dit ook het alhoewel somige mense claim dat die chip gee net die regte hoeveelheid diesel op die regte tyd maak dit nie vir my sin nie. As die fuel air mixture reg was hoekom is 'n engine wat ge chip geneig om meer swart te rook as 'n std engine, dit is mos juis te veel onbrande diesel wat die swart rook veroorsaak.

Dus steek daar iets in die hair cracks op die piston wat laater kan veroorsaak dat die piston 'n gat in brand, of is ek verkeerd as ek so dink.

Die heel nuutste Gen 4 Paj skop dieselfde Kw uit as wat die vorige Gen 4 uitskop met 'n chip, hoe sou Mistsu dit gedoen het. Is daar iets anders op die engine of het hulle ook maar met die mapping gespeel.

Ek is heel dom met die tipe van goed en is nie presies seker hoe dit werk nie.

I sent a forum post to Chip-It Australia asking how they alter the pump injection on the gen3 as it's not common rail.

Common rail engines are easy to chip as they up the fuel rail pressure and boost electronically and alter the mapping to suit those adjustments.

This was their response

http://www2.pajeroclub.com.au/forum/sho ... hp?t=24900

Ok, so the chip means more fuel,is that good or bad for your engine?

Mine is a comon rail and the guy that removed it had only plugged it out and told me that the car is back to standard once the chip is been unplugged, he said nothing about turbo maping or is that also controled by the chip.

What did Mitsu done to pushed the kw and torque up on the new commin rail engine, I think it's only from 2010 up that the kw were pushed up to 141 kw, the older commin rail engine only pushed 121 kw.

Ek het maar die so bietjie op die net gekry. Hoop dit sal 'n vrae antwoord.

Last night, I collect my pajero from Henk after he fixed a few things on the pajero. "Die pajero trek lekker, het jy n chip in?" Hmmmmm, I'm not sure, I don't think so. So we open the side panel, there it is..Dastek chip.

Now, I want to unplug the chip and see if it makes any difference in my fuel consumption. From what I understand, it's just a piggyback system, so unplug and all goes back to normal.

Has anybody ever removed a chip and had issues afterwords?
Is it safe to just unplug the chip and return to normal?

I'm not a big fan off chips......I believe the guys in the white coats know there stuff and will design the vehicle for a good balance of performance, economy and reliability.

So if there is no issues that I should know of when unplugging the chip, I will do a few weeks run without the chip to monitor fuel consumption and power.