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View Full Version : Throttle pot onto Jenvey ITB's


peester
19-11-09, 08:31 AM
Hi. Last month mr boywer gave me a throttle pot, tho it is the correct MBE/Jenvey one - the ITB's stick open when full throttle.. you have to nudge the linkage back again and it flicks/slams shut again - this happens when you have the t.pot screwed on.. even just loosely.
With the t.pot off/removed/very loose it opens fully/shuts/doesnt catch/stick at all..

Now its not new, one thing maybe worth mentioning - it has been returned by another previous customer. Martin is adament the problem the old customer had wasnt to do with the t.pot and tho they changed it , it was a fuel pump issue..
I have rang martin days after picking it up about it sticking at full throttle and i think he was telling me i wasnt screwing the t.pot on straight..

Anyway i cant seem to fit it lol.. any gen?
Jonlem
19-11-09, 10:01 AM
Had a similar problem on a pair of Webers but it was simply the linkage getting jammed.

Sounds likely that the tps has a fault so I'd change it, I'll find out which one mine uses but I know it wasn't the cheapest option.
peester
19-11-09, 10:06 AM
ok cheers. Well as long as i can wait, it wont cost bugger all as martin would have to sort it.
Jonlem
19-11-09, 10:10 AM
Good luck with that one ! lol
Will F
19-11-09, 11:31 AM
Cant you test the TPS when its off the TBS?

Just get a small flat-blade screw driver and see if it sticks when its fully turned?
Stuart
19-11-09, 02:05 PM
most likely to be a colven pot.... FAR from cheap
Jonlem
19-11-09, 02:52 PM
Not sure what it is Stuart, the guy who supplied the Jenvey stuff advised I used it over anything OE or cheap.
Will F
19-11-09, 02:54 PM
I bought one for my Jenveys from a generic electrical shop...

RS Components iirc

Works a treat...
Jonlem
19-11-09, 03:19 PM
I'll find out which one I had supplied, normally I would of just used the one they supply in the kit but I had to make a kit up for the Honda lump and I was advised to use a specific tps sensor rather than the Honda or usual one the Jenvey setup uses.
MARTIN KELSON
19-11-09, 07:41 PM
Hi mate

You got a picture of it mate & what plugs on the end?
If its the same as mine you could borrow it for a few days before i get my throttle bodies set up.
I believe it to be a Jenvey pot with the 'sureseal' 3 pin plug on the end.

Martin
peester
19-11-09, 10:07 PM
http://img.photobucket.com/albums/v11/peester/throttlepot1.jpg

This is the bugger in question.
Thanks for the replies guys..
Mr Foy i will try the screw driver thing as you said, didnt think of that.. im up at the unit all day tommorow..
Jonlem, Stuart, as said, money wont be an issue.. ive had the item a couple of weeks so i could get it changed, if its at fault for free..
Martin thanks for the kind offer, hopefully it wont come to that lol..
Ive spoken to Simon @ jenvey today briefly too, he wants to see pics so im about to email him now..
peester
20-11-09, 05:41 PM
bumping the thread, and in responce to this will..


Cant you test the TPS when its off the TBS?

Just get a small flat-blade screw driver and see if it sticks when its fully turned?

..i did turn a screwdriver in it and it did have subborn/sticky 'areas' where it didnt turn nicely/consistantly all the way 'round.. It was stoppping me from turning it anymore..
So i dont really know what that means but there you go.
Stuart
20-11-09, 06:12 PM
Thats a colvern pot. £40-50 :)
MARTIN KELSON
20-11-09, 09:22 PM
Hi Dave,

Here is a pic of my old throttle bodies before they were swapped but same pot.

http://i12.photobucket.com/albums/a220/NOVAMARTIN16V/DSC03040.jpg

Looks same as yours but i have a metal 'cover' on mine. Nothing as stupid as screws to long without the 'cover' fouling on something??

Unlikely i know but all i could think off.

Martin
peester
20-11-09, 10:07 PM
thanks for your suggestions guys..
martin ur right - jenvey too show a little metal cover over the top..
http://img.photobucket.com/albums/v11/peester/Tp1x_L.jpg
looking on jenveys site, indeed this diagram, shows there does seem to be spacers and covers available, but i guess i still need to work out if the pot itself is ok or not..
http://img.photobucket.com/albums/v11/peester/TP_CP17.gif
Will F
21-11-09, 12:17 AM
Same TPS as mine - get it from RS....

Around £20 iirc
peester
21-11-09, 07:30 AM
ok thanks will.. whose RS then? lol
Will F
21-11-09, 10:19 AM
http://uk.rs-online.com/web/home.html

I had a quick look - but the site is HOOOGE! lol
Mazz
21-11-09, 11:09 AM
eeek, the RS catalogue - good luck finding it in there Dave without a part#
craig green
21-11-09, 12:02 PM
RS catalogue strikes again.

Try the part nos printed on your TPS. I dare say the missing load spacer may have something to do with it sticking.
Stuart
21-11-09, 12:46 PM
the lack of a load spreader might be causing the pot to bind up when bolted in place.
peester
21-11-09, 06:54 PM
hope so guys,.. off i go in search
Will F
23-11-09, 08:46 AM
the lack of a load spreader might be causing the pot to bind up when bolted in place.

Yeah - mine did that when I first fitted it actually...
peester
23-11-09, 08:55 PM
ive had a result with this , well im hoping so:
spoken with si @ jenvey hes asked me to send what i have back and hes going to replace it with a new one , complete with the load - cover and new screws.
Awesome service, so far.
MARTIN KELSON
23-11-09, 09:12 PM
ive had a result with this , well im hoping so:
spoken with si @ jenvey hes asked me to send what i have back and hes going to replace it with a new one , complete with the load - cover and new screws.
Awesome service, so far.

Spot on.
Jenvey were helpful the couple of times i have dealt with them.
There only in Bridgenorth so if your desperate there not far away.

Martin
phazer
23-11-09, 10:34 PM
Yeah very helpful IME too. Makes a nice change.