New injectors maybe

[Bat21]

My 80 has always smoked a little when idling, nothing drastically bad just a light coloured smoke which when booted turns Black (unburnt fuel). She doesn't use any oil so I'm guessing she could do with a new set of injectors.

Am I right in thinking it is just the tips that are needed? Do I need to remove and send my injectors to be 're tipped'? if so, who do you guys recommended out there?

 

[Rob]

Get them checked before you re tip them. You will need to take it to a specialist anyway so may as well test them first. RVS in Swindon are highly recommended.

 

[Bat21]

Thanks Rob, I'll give RVS a bell tomorrow and see what they suggest

 

[Chris]

Karl has re tipped injectors I believe - at a very competitive price. Mine used to give out light white smoke that made your eyes water. The 80 seems very tolerant of poor injectors and re tipping them (in my experience) isn't quite the boost that you might think. But they do run cleaner. Nothing to do with black smoke though as far I know. New tips cured that straight away, but it made no difference to the MPG. When tested they were absolutely buggered.

I have a local chap who tests mine for me and will re tip them too. But I have to be honest and say that I can't match Karl's price.

Chris

 

[Scott]

I pulled mine out this morning and dropped them down to a local diesel specialist to be sorted, as the 80 was starting to get a little too smokey for my liking, and at 19 years old I think they deserve a bit of attention.

Its not cheap though

 

[Chris]

I get them tested for a tenner. Re tipping is more obviously, plus you need to buy the tips. I have a 70k set that I need to test. They might be spot on!

Right.


Chris

 

[Paul_Humphreys]

Paul, Try Dr Diesel in Oswestry, he is very good.

Paul

 

[Bat21]

Thanks chaps. I didn't get round to calling RVS today, was too busy swapping out a headlight that got smashed in Morocco

I'm not looking for any performance boost, just thought as the old girl has taken up 'smoking' I'd try and discourage her

As Doc diesel is local, I might give him a bell.

 

[Scott]

I stuck the reconditioned injectors back in this morning, with new injector seating washers etc... (All of the injectors had new Denso tips fitted). Pumped the fuel hand primer for around 30 secs till it went hard (behave ) Then she fired up after a few revolutions and settled to the usual smooth idle after a couple of seconds.

Took the truck to work and she seems to be pulling well, may be slightly crisper than before, and is definately less smokey under acceleration. So I'm happy, time will tell if it makes any difference to the mpg.

One thing I have noticed is that the warm engine idle speed has dropped, she's now idling around 600rpm, you notice sitting at the lights with the auto box in drive, that the engine is not quite as smooth as before. I'm guessing that the nice fine mist/spray now coming out of the injectors is delivering less diesel than the dribbling that use to be happening, and so the engine is idling slower as a result of the reduction in diesel from the injectors.

I'll have a little tweak on the idle adjustment tomorrow to get back to normal, I think it was around 800rpm before.

 

[Chris]

Sounds pretty familiar Scott. Mine did the same.

Where did you get the tips?

Chris

 

[Scott]

Where did you get the tips?

I let the diesel specialist deal with that, they sourced them from their supplier. I like to make sure that good quality parts are used and if I let them supply the parts, as well as do the work, then the is a warranty on both. They told me that they were Denso ones that came off, so that's what they ordered to refit, but they were going to be more expensive that they first thought. Well it is a Toyota!

I forgot to mention in my previous post that removing the old injector seating washers took a little big of thought. I found that a long M8 bolt would thread into the washer and I was able to pull one out, but the rest were having none of it!

So I consulted Yoda (read Chris) and he advised that I was on the correct track with the M8 bolt, and that I needed to employ the use of a slide hammer. Que a trip to Machine Mart as the slide hammer in the workshop was too long for the job, and a suitable one was bought. I modified one of the attachments to hook snuggly under the head of the M8 bolt, and it was the work of a couple of mins to slide hammer the old washers out. A couple did put up a fight most of the way out.