Skip to main content ↑ ↓

Show Posts

This section allows you to view all Show Posts made by this member. Note that you can only see Show Posts made in areas you currently have access to.

Messages - Keekster64

5
Engine & Gearbox / Re: 1991 1.6 Driver - Weber 32/34
It is the right item. I have the same carb, and bought that rubber mount myself. The adaptor plate is designed to convert the Weber to fit the original rubber mount.
7
Engine & Gearbox / Re: 1991 1.6 Driver - Weber 32/34
Quote from: merlinuk on
In the image I posted, I showed where the metal mount meets the manifold with the rubber on top of that. The rubber looks OK but the mount is very badly split and warped. Upon searching for replacement mounts I couldn't find one that looks like my broken one, So I referred to the image of a brand new Weber 32/34 MK2 kit and the mount that I'm supposed to have looks nothing like mine... just a £90 replacement  :-[
The part that is split in that photo, is the rubber mount.  The rubber mount bolts straight onto the inlet manifold.  It looks like someone has painted over the bottom half of the rubber mount, presumably to paint the manifold.  Once you remove the carb you will be able to see it properly.  I recommend the Febi rubber mount, as it puts up with the ethanol in modern fuel better.  However, I dont think its the cause of your idle issue.
8
Engine & Gearbox / Re: 1991 1.6 Driver - Weber 32/34
If anything has broken, its most likely to be the rubber mount for the carb, which tend to split.  You can get replacements off ebay.  I prefer the Febi Bilstein one because the quality is much better.  All the parts for the carb can be bought from Web con.  https://www.webcon.co.uk/  However, I dont think a high idle would be caused by a vacuum leak.  In my experience a vacuum leak causes a car to idle lower and stall, because the extra air leans out the mixture.  Have you tried adjusting the idle?  You do this by adjusting the throttle stop which is easy to do.
9
Engine & Gearbox / Re: 1.3 1990 MK2
Quote from: mintysgt on
I'm personally half way through this topic myself. I'm £300 in to my carb on the Jetta. we have all been aware for years the peirburg is trouble. How ever after chatting with a couple of different mechanics. One that worked a lot on these carbs while working at a karmann restoration place "thou not strictly just them". Well he reassured me that getting a full rebuild kit, ultra sonic cleaner on the parts. it would be fine an working like new. That was true for all of 5 mins really. I've been back and forth a few times having it adjusted, as the idle and auto choke just love doing there own thing after a couple of hundred miles.

Talking again in recent times with him, Has now said if it plays up again just chuck a webber at it, or start the whole process again this time paying for the complete service to be carried out. Which after investing over half the value of a new webber. well you can guess its a bitter pill to swallow.

So long story short. I knew them carbs was a pain, we all know there a pain. I'm 300 deep on the carb now. Meaning the actual end bill, will now be £1000 if I act now. How ever I don't do mega miles, MOT in October, I may just wait


But I must add. I'm not a professional, I may of not cleaned the carb enough, I may of not done the carb rebuild correctly. There for I may well be the cause of the issues afterward the event "thou identical still". My story certainly is not the same as both mechanics claimed, as they both said a rebuild, ultra sonic clean, will cure it

But needless to say, I'm not investing any more money or time on the pierburg


Has your jetta got the 1.3 engine or a 1.6/1.8l?
11
Engine & Gearbox / Re: 1.3 1990 MK2
Hi.  I'm less familiar with the carb in the 1.3l, but there are some useful videos on how to rebuild the stock carb, and there are gaskets sets available.  Its a lot simpler than the one in the 1.6!  If its sat for 10 years, I would expect the carb to be full of crap, so its worth at least taking the top off it, and giving it a good clean with carb cleaner and blasting through all the passages with compressed air.  If you dont have a compressor, just buy an aerosol of compressed air off amazon.
12
Heating & Cooling / Re: Temperature sensors/ senders
Not sure which one you need to replace.  I replaced the one on top nearest the cylinder head, which was a grey one, and I had to buy it off ebay, cause I couldn't find it anywhere else.  The grey one goes to the choke.  The other one on top goes to the hedgehog, and I've not idea what the one below is for.  I have a driver as well.
14
Technical / Re: 1.6 Driver Carb/Running issues
No problem.  I spent a lot of time doing research on the Pierburg, and ended up stripping mine (the one in the video), to clean it.  The video explains the various parts of the carb, and how they work.  There are other videos as well.  If you have a manual choke that gets rid of one potential source of trouble, i.e. the mixture.  However, the idle will still be set by the three point unit, and the waxstat, neither of which are controlled by the choke cable, which explains why adjusting the choke does nothing.  There are two electric connections on the back of the carb, the solenoid, which when activated stops the three point unit fully retracting (via the vacuum hoses), and the thermo time value, its only job being to allow the engine to rev higher (about 2k for up to 30s), when you first start it up, again by adjusting the vacuum in the 3 point unit.  If you do the checks above, you should hopefully get to the bottom of it.
15
Technical / Re: 1.6 Driver Carb/Running issues
Does it have the original Pierburg carb, or a weber?

I'll assume it has the original.  The Pierburg carb is a fussy carb and look very complex on first appearance, but you can get your head round it with the help of some you tube videos.  If you have sorted the rubber mount, then the next thing I would check is the vacuum hoses behind the carb for splits.  I prefer good fitting silicone hose cause it lasts longer.  When you start the engine from cold, the idle is initially set by the 3 point unit on the left hand side, then it drops after a few seconds (up to 30s), and the idle is controlled by the waxstat.  The waxstat as it warms up causes an arm to turn causing the idle to drop.  If you remove it and find wax or coolant is leaking out of it, its knackered and needs replaced (assuming you can find one).  In my experience, they are slow to react causing the idle to stay higher than you need for a quite a while. But it has no affect on the mixture, just the idle speed.

The vacuum hoses control the 3 point unit only.   There is a solenoid on the carb that should click when you turn the ignition  on, if it doesn't the 3 point unit will retract fully and it wont idle.  You can test it by putting 12v through it.  The choke is on the top of the carb.  It controls the mixture only.  It has a 12v wire feed, but its also controlled by the coolant.  The 12v feed comes from the grey thermo switch on the top hose.  Next to the head.  When the engine is cold you should get 12v from the wire that goes to the fuse box, and from the thermo switch to the carb.  You also need to check that the carb is earthed.  If not the electric feed to the choke wont work.  This is important, as it causes the choke to back off whilst the coolant is still cold.  A simple check is to remove the air box and switch the ignition but not start the engine.  After a minute you should notice the choke flap starting to open.  If the choke will only back off once the coolant pipes get hot it will run far too rich when cold and cause the carb to flood and it bogs down the car, giving very rough running. 

If you have checked all this and it still wont idle it may have a blocked jet in the carb.
https://youtu.be/taTBdkrQouI?si=KyG7qe4UiuHW4-a_