Failed emissions mot

[Reddog]

just had my mot and it failed on emissions,so a diesel mechanic told me it could be because japs emissions are higher than limit over here but he also said because surfs have an electrical pump it is expensive to adjust, seriously need to get emissions down,if its running rich how easy is it to reduce?

[Koi]

just had my mot and it failed on emissions,so a diesel mechanic told me it could be because japs emissions are higher than limit over here but he also said because surfs have an electrical pump it is expensive to adjust, seriously need to get emissions down,if its running rich how easy is it to reduce?

Stick a bottle of redex in a 1/4 of a tank and run for a while, then right before MOT make sure you take it for a good blast to clear it out. Also disconnecting the EGR will lower the emissions.

[Guest]

just had my mot and it failed on emissions,so a diesel mechanic told me it could be because japs emissions are higher than limit over here but he also said because surfs have an electrical pump it is expensive to adjust, seriously need to get emissions down,if its running rich how easy is it to reduce?

As Koi says, Redex will reduce it as will removing the EGR. My emissions last MOT (couple of months ago) were 0.6ppm and I think the limit is 5ppm or something like that.

The Hilux engine is not by default a high emissions engine and should pass easily anyway, however doing the above will help it to pass better.

Also never take the engine into the centre cold, always give it a good thrash on the way.

If it is running rich and the above don't help then you probably need to get the injectors reconditioned or replaced. The pump is pretty reliable and should not need adjusting. The 2LTE engine pump is also adjusted automatically by the ECU and you can only adjust the peak fuel flow rate anyway.

Also make sure that the aircleaner is clean - any doubts replace it. A blocked air cleaner will seriously increase the emissions.

Cheers

[hardimap]

Just had mine MOT'd

Failed first time with an average of 7.79
Guy told me to stick a bottle of diesel injector cleaner in (which he sold me for £10)

took it for a blast, lots of black smoke and 10 mins later put it back on the machine, it passed with a value of 1.93

The limit for a turbo diesel is 3 (or so he told me)

[Dazza]

Mine failed mot on it too, new injectors pistons head blah blah, guy said thrash it like you hate and come back, was worried about my newly rebuilt motor but did what he said and it sailed through.

[Reddog]

yep it worked added redex and thrashed the truck about smoked a bit at first then cleared up went back for retest and it sailed through,although can anyone help with the speeding tickets in the process cheers for help

[Woodie]

yep it worked added redex and thrashed the truck about smoked a bit at first then cleared up went back for retest and it sailed through,although can anyone help with the speeding tickets in the process cheers for help

Same thing, if i'm running around trying to save diesel it seems to oil up?
A couple of large wellies when its hot and no more smoke screen in the rear mirror!

[silvtr1000]

Thick Question

Does smoke equal poor emissions?

It seems that most of us have smoke issues, so does it follow that if you have any smoke at all, you'll fail an emissions test?

Or is what they test for not present in smoke?

Mark

[hardimap]

When I took mine back for the re-test, during the rev up it booted out some smoke but not too much.
When they first did it, it filled the workshop with black smoke
They had to open all the door and put the fans on to clear it before they all choked

According to the guy that did my MOT, he said they will always smoke a little, and the first reading will always be worse, something to do with the turbo

[Guest]

Does smoke equal poor emissions?

It seems that most of us have smoke issues, so does it follow that if you have any smoke at all, you'll fail an emissions test?

Or is what they test for not present in smoke?

Mark

Mark.

They do two tests on Diesels as far as I am aware.

1. Visual smoke test - it's got to be like a James Bond smokescreen effect before they fail you on this one - you get a lot of slack on smoke under accelleration.
2. CO2 emissions. The smoke is not directly associated with this however if it does smoke a real lot, then you can be pretty much sure that the emissions will be higher.

The Smoke (we are talking black smoke here, not blue (oil) or white (steam)) is heavy carbon deposits which are caused by unburnt fuel. All diesels smoke a bit because the burn is never 100% efficient however excessive smoke can be caused by blocked open EGR, duff injectors, low compression, blocked aircleaner, air leaks, bad glowplugs, turbo duff etc etc etc..

Cheers