Preformance Chip Pajero NS 2007-blew DPF

If it actually has a DPF, a chip can easily be overfuelling and that combined with Higher than normal EGT's would load hydrocarbons into the pockets of a DPF (if fitted).
Then that would cause it, the DPF to try and burn off the, unusual additional amount of hydrocarbon fuel and generate heat far in excess of what will normally happen.

Isuzu trucks are fitted with a DPF and when it need to burn itself clean ie regeneration, it will slow the truck and you pull over until it burns off the carbon load AS IT IDLES and is therefore not work hard and exhaust gasses are cooler.

Partially Blocked CATS can also generate a lot of heat as the catalyst tries to ignite any fuel passing through it's internal matrix.

Red hot exhausts do happen, I would imagine "overfuelled", hard working, exiting exhaust will "light your fire" quite easily.

Nah, chips can't do that could they? Rubbish.

Ps Look at some vehicle substantial heat shields, they aren't fitted because the factory had spare material to get rid off. Idling and fan air flows dissipates the underbody heat generated during such events.

Cheers
Ross M

I didn't say they couldn't do it just hard to believe, it was only 50 kays.

The chip doesn't have to be faulty, all it has to do is overfuel. That isn't necessarily a fault but a setting level.

Lots of Navaras have chips which aren't faulty but under a decent load and particularly on acceleration they blow black smoke and the chip is just fine, but set too high and overfuels.

Most people who add a chip also fit a larger exhaust to cater for and clear more exhaust gas flow and therefore heat.
If it still has the OE exhaust system it may be not flowing as free as the chip thinks is happening so heat builds up.

Every modification brings it's own set of problems which have to be understood and allowed for if success is to be ongoing.

Thanks Ross. The original poster mentioned the chip was faulty and I wondered where that info came from. Yes I agree popping a chip in is just the start of the process. And I guess this vehicle is quite old to now be popping a chip in, possibly with no other mods.

I have a NS Pajero and it does have a DPF fitted as standard, hence the exorbitant cost for low ash engine oil at each service. You can get a DPF delete pipe which removes the DPF (and hence the need for low ash engine oil). Some chip manufacturers recommend this be done before a chip is fitted. The Pajero forums on line have much more information on this. Interestingly, the later model Pajero was not fitted with a DPF.

As above - I have a NS Pajero - 2007 with a DPF.

I had it removed and replaced by a CHIPIT DELETE PIPE before getting it chipped (TUNEIT). I did this a couple of years ago and do tow a van.

I have left the chip at the standard setting. This has given enough extra grunt.

I was giving away my old DPF as I am trading it in but the dealer said he wanted it as it will be required when they register and sell it. Something you may think of if just replacing the DPF with the pipe.

Removing the DPF made the car run a lot better.

Good luck as the DPFs are expensive compared too the pipes.


Richard