Hi all..

[gardner51]

First post!

Hi all, just picked up my first r5 turbo, its a d reg ph1, heres a quick spec list...


Ported polished big valve head triple angle valve new valve seats shortened valve guides matched manifolds oil gallery mod,1.9mm head gasket set.uprated bolts.
piper 285 cam
Group a carb
Low compression pistons
New liners
All new bearings mains,big ends, thrust washers. New oil pump,balanced crank flywheel, new gaskets. ,group n clutch,

T28 roller bearing turbo.
Braided oil feed turbo.big turbo elbo k Tec 2.5 down pipe side exit system
Pro alloy grill mounted front mount
Full set blue samco.
Alloy header tank
Alloy swirl pot
Alloy breather swirl pot
Alloy breather tank
Alloy carb top
Alloy bleed valve

In car boost k Tec
Big brakes 285mm
Spax 40mm kit





im having trouble with it idleing tho, coming up to junctions/rounabouts it seems to stall 80% of the time unless i keep a little throttle on,

the car has sat for a while and today had its first long run in a while, it drives fine and boosts perfect (well i think so) but its just the idleing that lets it down, can anyone point me in the rite direction to what it possibly might be?

sorry for the neewbie questons,

Thanks all

Ellz

[Junglist]

Hi mate welcome to the club ,,
have you tried adjusting the idle screw on the carb , what revs does it idle at ?

[Ian S]

Yes it'll probably be carb related.

Does is still have an idle mixture screw? They fall out sometimes.

Dirt in the idle jet.

Also could be air leaking into the carb due to wear of the spindle shaft seals or the base being a bit warped.

A factor could also be corroded joins in the electrical current path to the ECU + feed or / and earthing.

[gardner51]

New poster! (less than 10 posts)

Thanks for the fast replys..

It still does have the idle screw in. I have tried upping it but still seems to want to stall,

The car has sat around on a drive for a while. So poss blocked idle jet how easy is this to check?

Ellz

[Tony Walker]

theres the mixture screw you can adjust, also theres the idle rpm on the throttle.

[gardner51]

New poster! (less than 10 posts)

I have adjusted the idle rpm but still seems to do it. More so when its hot,

Ellz

[Ian S]

The idle jet is inside a large brass holder on one side of the carb.

Take that out with a wide screw driver and it comes apart. There is often a small brass rod in there rattling. That will just fall out so open it carefully. The idle jet just just pulls out of the holder.

Blow it through with some brake cleaner aerosol or whatever and see if that makes it any better.

27 & 28 on the right of the drawing; 2nd pic down: https://www.rtoc.org/boards/showthread.php?t=27381

Can been seen in the middle of the side in the 3rd pic down. Round brass with slot for wide screw driver.

[gardner51]

New poster! (less than 10 posts)

Thank you very much. I'll give this ago later today and see how it is,

Ellz

[gttjames]

it was fine when 1st started, but then after the motorway run to get it home and it was hot it was cutting out when pulling upto junctions, also when it would idle when hot it was hunting alot. I did notice one hole was filled with sealent. If your looking at carb from o/s of car under the fuel pipe is a flat head to the side, well below that is another hole and this is sealed up?

[gttjames]

could be worth giving the carb a once over and checking the fuelling to get it setup right if theres any local members good with carbs? Im rubbish with carbs

[Ian S]

...another hole and this is sealed up?

That's the top of the idle mixture screw.

[gardner51]

New poster! (less than 10 posts)

Cheers james, heres a pic of the hole that seems to be sealed up?



any ideas?

Ellz

[Ian S]

See post 11.

[gardner51]

New poster! (less than 10 posts)

i see, so this is ok to have silcone in the top,

ill remove the bronze flat head and make sure theirs no dirt inside,

Ellz

[Ian S]

so this is ok to have silicone in the top

Not ideal. It's a bodge to stop the screw falling out. It may or may not stop it backing off from the correct setting. So the setting may be not correct. The way to find that out is take the car to an MOT station and have / pay them to measure the CO and Lambda. If it's wrong, they can't adjust until the Silicone is dug out.

You should try cleaning the idle jet first.

[gardner51]

New poster! (less than 10 posts)

Thankyou for your help. It was the idle jet that was blocked. Cleaned it and she idles spot on again.

Ellz

[Ian S]

And you've possibly saved from potential garage costs more than the cost of membership within just your first eight posts?

[gardner51]

New poster! (less than 10 posts)

would never take it to a garage lol,

but money well spent on a membership

Ellz