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  1. Today
  2. dvderlm

    Weber Woes - DMTL on Mk2

    Here's a coolant swirl pot. It de-aerates out of the top. Feeds in the side high up and exits out the bottom. https://www.pegasusautoracing.com/productdetails.asp?RecID=10244
  3. dvderlm

    Weber Woes - DMTL on Mk2

    Haynes Golf 1.6 carb shows swirl pot like this. That's not how I remember. I thought it went in at highest side and to carb from lowest point and return was the central top because bubbles rise in the centre, but fuel is swirled around the outside. That's certainly how the Pierburg pot is plumbed, so I suspect Haynes may be wrong for the 1.6 plumbing. Compare This is on the same page 4A-6 as previous pic, Haynes Golf and Jetta 84 to 92. And I'm fairly sure feed from pump is 7.9mm tube and return is 5.9mm so it is hard to get it wrong. But the carb well also removes bubbles, so it only matters when fuel prefers to drain back to the tank than flow into carb when it's needle valve reopens. This will happen with reduced flow from pump. Try clamping the return line partially?
  4. dvderlm

    Weber Woes - DMTL on Mk2

    Mechanical fuel pump might be giving up?
  5. dvderlm

    Weber Woes - DMTL on Mk2

    Long shot but the pump diaphragm might have split. it covers the weakening which occurs when open throttle because petrol is heavier than air so takes a while to catch up. But you see it squirt down throat when operate the accel cable lever by hand? So not pump. hm Can you blow air through from mixture screw hole into the well and hear it bubble?
  6. More to fault find than tune, but essentially highest manifold vacuum is greatest suction from the pistons descending since an engine is just an air pump. You need a take off point below throttle plate.. Try www.classiccarhub.co.uk/articles/tuning-and-fault-finding-using-a-vacuum-gauge.html or https://www.onallcylinders.com/2015/05/08/quick-tech-how-to-read-a-vacuum-gauge-to-pinpoint-engine-problems/
  7. 1vw2many

    1977 Mk1 Polo Manila

    Very good work keep going you be done soon.
  8. Sunbeamlotus

    Mk1 polo hayabusa

    Thank you ... goes well but a bit loud you after any parts I have a few bits knocking about
  9. foreststu

    Mk1 polo hayabusa

    It's awesome mate, well done
  10. Sunbeamlotus

    Mk1 polo hayabusa

    Yep ...... I changed the colour so I could find it in a carpark its been out out a few times .... even shopping in Lidl
  11. Time Left: 29 days and 7 hours

    • FOR SALE
    • USED

    I have a 2004 Polo 1.2 8v for sale. Tjhis is for SPARES or REPAIR as it has a fault. MOT till September though. The car us a 3 door 3 owner car with 91300 miles from new with history and invoices to back that up. The car has developed a fault in the last few weeks during lockdown. 1) THE EPC light is on - I have checked the brake light switch and called the breakdown service out. They think its electrical and he pulled out fuel sensor and one wire looks cut. 2) Engine management light also came one - again the breakdown guy said it could be coil pack or lack of compression Hence the car is for sale as spares or repair. I could scapt it, but aside these faults its a tidy little car which has been looked after and in my view is in great condition for age. Its located in Harrow and can't be driven as its in limp mode. I was looking for £200, I have been offered £125 as scrap so far and a lot more as part exchange but I am never sure if that's a genuine deal. It would be a shame to scrap it. Any questions or if you want more pictures please let me know. Thanks

    £200.00

    Harrow, England - GB

  12. Yesterday
  13. Hi, I'm sorry to bump this, but... How do you use a vacuum gauge to tune the carb?
  14. foreststu

    Mk1 polo hayabusa

    Saw this hayabusa Mk1 Polo at Caffeine & Machine back around New Year, you go yellow before your last post or is it a twin!
  15. foreststu

    1977 Mk1 Polo Manila

    Ok since my last post things have mostly been getting rid of the crumbly and welding the good.... ... floors, valance, rear wings... ... inner wings... ...and more... ...unsurprisingly front panel... ...NOS front panel and front wings. So after all that I needed a bling pick-me-up so got the brakes refurbed... ...and of course, especially during lockdown, I've been buying more parts! Metalwork almost done ready for the pre-body strip down, now if I could only leave the house....
  16. Qwerty

    GT Genesis

    The RSL's look great!
  17. Richiecole

    14” P Slots on a MK2 Breadvan

    Thanks Qwerty, I think this is the route I’m going to take. Appreciate the reply.
  18. Qwerty

    Will ET22 BBS fit a breadvan ?

    Tyre choice will make a big difference. However even with something like a 165/55 will probably require slight arch work.
  19. 165/55's work well. My brother runs the same setup on his mk2.
  20. Jim1500

    Mk2 air filter

    Bosch S9054 (1457429054) Air Filter That's the only one I can see there and seems to be the bigger type when I checked. I'm in no mad rush if not from GSF as I was just wanting to add on to an order, I'll get it sorted. Has anyone used the home delivery with GSF? It says £25 and over it's free, the order I made was £20 but it said qualified for free delivery, although when I went to pay they were adding £19.95 for delivery!!!
  21. Jim1500

    Mk2 air filter

    Cheers, I was almost sure it was the smaller one, was ordering a few bits from GSF and was going to add this on, so I'm right thinking it's GSF part no 122VG0150 Out of stock as you say though so I'll try one of the other links cheers.
  22. anessen

    Weber Woes - DMTL on Mk2

    I've reconnected the thing with the return on top, the intake in the middle, and the line out to the carb on the bottom. It seems to have helped a bit, but still having problems as soon as the throttle opens into the second stage
  23. Last week
  24. bastibum

    Weber Woes - DMTL on Mk2

    Do you have an OEM-number on it? That could get you the correct diagram
  25. anessen

    Weber Woes - DMTL on Mk2

    I found a picture of the one I'm using. sadly, it has no markings. The diagrams I'm seeing online have conflicting information on how these things work. Some are saying that the return should be the top?
  26. bastibum

    Weber Woes - DMTL on Mk2

    Does the swirl pot look something like this? This an aftermarket version of a golf mk2 swirl pot. This brand was smart enough to engrave the connections. It applies to the original swirl pot as well I believe.
  27. Time Left: 27 days and 20 hours

    • FOR SALE
    • USED

    VW polo harlequin COPY, selling with a heavy heart as its not ULEZ compliant. 1.6 automatic petrol, with only 39000 miles! Sunroof, CD radio, factory alloys, electric windows, MOT till October, basically all original except the paint job. The car drives like a dream, don't really want to sell but not ULEZ compliant. Body work in great condition. Eye catching car that's fun to drive. One tyre will need replacing and the starter motor will need looking at soon hence open to sensible offers, asking £700

    £700.00

    London - GB

  28. Hi, I've been struggling with my Weber carb for a while now, and I'm getting a bit bored of it. I have a DMTL 32/34 on a Mk2 Polo 2G engine, which is stock. Jetted as (from left to right, as seen from the front of the car, looking towards the back, with the throttle cable on the left): 70 | 185 - F30 - 120 | 155 - F22 - 100 | 45 Problems: All of these are on a hot engine with no choke. At Idle: No idle unless the mixture screw is 2.5 turns out. It's a little unstable but it's not obviously hunting (could be normal?) Coming off idle: Poor throttle response - 0.5 second delay, followed by a noticable lurch forward. Throttle feels like an on-off switch in low gears. Slowly opening to full throttle: Loss of power as second stage opens up, but no obvious misfire. Quickly opening to full throttle: Car hesitates, then lurches forward. I have tried: Searching for vacuum leaks. I have been spraying carb cleaner at the base of the carb, and at the hose connections. Nothing obvious. Timing. Ignition timing has been set and checked, with the vac advance unplugged and capped off. Twiddling the idle mixture screw. Highest idle speed is about 2.5-3 turns out. Cleaning. I have had the entire carb apart and thoroughly sprayed everything with carb cleaner. Float valve works. No obvious blockages. Mixture screw is air tight. Accelerator pump seems to work correctly and doesn't leak. Questions... At what point am I looking at jetting issues rather than something else? I have the Pierburg's old swirl pot (?) connected up and cable tied in place. So far I have the fuel going in at the top, the return in the middle, and the line off to the carb at the bottom. What's the proper way to connect it up?
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