Throttle Body Removal Guide

[Curdster]

MK1 Tuscan 2000. I have over the years each winter undertaken my own upgrades, interior, brake upgrades etc, and this winter I want to venture more under the bonnet than just replacing easy temp senders. I suffer from the hesitations at 2000rpm most have posted here, and plan to start with the TB bearing upgrade.
So is there a basics guide to removing and re-fitting the TB's and the watch-outs and the need to remembers etc.

[duff-man]

There's a guide here (page 44 onwards)
http://www.rndengineering.co.uk/tvr_all/downloads/...
I've not followed it myself but would be my first port of call.

Edited by duff-man on Thursday 30th October 22:15

[Curdster]

Thanks duff-man. I will update with progress but it may be a while.

Edited by Curdster on Thursday 30th October 22:26

[m4tti]

I've done this on several occasions over the last three months... Don't ask why


You have several methods to remove the bodies. You can either remove both the inlet and return fuel line, throttle cable, and other minor bits and remove all bodies in one lump attached to the rail. If you've not done this before I'd recommend removing them one by one. This should reduce the risk of dropping anything in there. Have a magnetic pickup tool on hand.

I'd recommend using some of the throttle body gaskets when refitting. It makes removal and replacement so much easier. Returning the injectors to the rail can be a pain too the o rings are easily damaged.

I got mine from a chap who advertises on here Andy_mr2sc.

You can see pics on my build thread http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Drop me a mail if you want any specifics.

[Curdster]

Guys thanks for all your advice here. Do you reccomend any type of cleaning of the injectors while they are out, and bearing in mind my inexperience. I will get some spare O rings and thanks for the link.

[m4tti]

You could get the injectors ultra sonically cleaned and the flow rates measured. Some people then put the highest flowing injector back in body 5 or 6.

Injector O rings are definitely worth replacing for a few quid.

[twinreal]

m4tti said:

Some people then put the highest flowing injector back in body 5 or 6.

Hi Matt,

what is the reason for that ? Fuel pressure ?

[m4tti]

I believe the theory is that those back cylinders run hotter and therefore additional fuel will aid cooling/prevent lean running. How much fuel you need in reality to make a difference and whether the injectors have enough variance to meet that is another thing.

Edited by m4tti on Friday 31st October 16:22

Edited by m4tti on Friday 31st October 16:22

[twinreal]

Cheers !