Pierburg 2E3 problems - on-going faults, read this!

[fatfrosty1966]

Thanks for all the feedback, as soon as i have a spare day (Sunday) I will do some more tinkering. I will try the local vw breakers for the right hoses and take it from there, I look forward to a challenge!! Look forward to the 24mpg at some point in the future if all goes well.

[Ian Hulley]

look forward to the 24mpg at some point in the future

I wouldn't hold your breath.

Here's a photo of our's when it was a 1.9 showing the 2 choke hoses (arrowed) ..



Obviously having been a 2.1 your's doesn't have the 'Y' shaped hose going from the header tank to the pump pipe and to the choke(2.1's don't have a carb or therefore a choke like that), it will just be a small 'S' shaped one instead.

Ian

[ghost123uk]

look forward to the 24mpg at some point in the future

I wouldn't hold your breath.

Ian

It's doable
I got exactly that during our trip around France. We did 1,800 miles, about half LPG and half petrol. I monitored MPG pretty accurately and got an average for the whole trip of 24 on Petrol and 19.5 on LPG. That was of course a mix of motorways (~65mph) towns and mountain roads. DG power by the way.

p.s. I didn't realise "doable" was a real word

[silverbullet]

24 mpg is what I got from our syncro with a rebuilt DG. If you're not getting in the 20's on petrol then the motor is probably well past it's best...

Anyhoo, I managed to swing a bit of tinkering time today and gave the carb a quickie in-situ refresh with a Brickwerks kit. Photos and blurb to follow but the bottom line was that the hesitation was all down to a damaged acceleration pump valve. I'll get it drafted and post up in a bit.

[silverbullet]

Ironically the part-load running was even worse for the carb re-furb. So I went hunting for leaks. Again.

It occurred to me that I hadn't checked the hot air pick-up hidden and forgotten behind the o/s rear light unit, that has a vacuum unit that might have failed and be leaking air. It isn't. Fully functional. er I mean

OK carb off, strip down again before the gasket welds the top & bottom together. There's only one place left for a leak that could have been worsened by external cleaning...with the hefty throttle spring removed (those cams were tight on the spindle!) the primary spindle was found to be like a broom handle in a bucket. The bushes were shot, spindle only 0.002" wear.

I found some 5/16" x 7/16" x 1/2" oilite bushes and got the job done, along with spot-facing the body to get a skinny washer under the cams, to limit the end-float to virtually nothing. That will not leak air!

All back together tomorrow, you'll be the first to know...

[Oldiebut goodie]

I found some handy bushes on some old scrap Epson printers - two of which are now the bearings for my weather vane!

[HarryMann]

Weather vane You'll be telling us you have an anemometer up there too at 32.8084 ft (Oops! I mean 10 metres) prescribed height soon

I found some 5/16" x 7/16" x 1/2" oilite bushes and got the job done,

They is the biz dem oilites Ian, I still have a good few flanged 1/4" ones from making a shedload of proper hang-points for Microlights... the first UK Trikes came with a 1/4" bolt through a very basic 'U' bracket of 1/8" steel, which bolts wore frightening oval holes in said bracket . Never knew one failed, but prospective aviators (or usually their wives) were not exactly 'assured' by our blandishments on the subject...

[silverbullet]

Well if it doesn't behave after all this I'm at a loss. A pair of HIF4's are waiting in the wings for manifolds to be welded and then I'm going to play "guess the needle"

[silverbullet]

Lots, lots better! Still not perfect, maybe 95% performance but considering it's jetted for a standard 1.9, not too bad at all. Decided to leave the timing at 5 degrees BTDC. Vacuum advance definitely doing it's job.

New spindle bushes were a tad tight toward the WOT end, they conspired with the dry throttle cable to give a couple of "off-the-end" rpm moments when changing gear

All well and sorted now after a bit of wrangling and lots of teflon lube spray, engine still happy after the rude awakening

[ghost123uk]

Glad to hear you got to the bottom of it

couple of "off-the-end" rpm moments when changing gear... engine still happy after the rude awakening.

Ah, similar to an "Italian tune up" as someone else on here recently said