Hesitation

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

bug '59 - 28 Aug 2005 12:27 GMT

Hi ramva,

I've been tinkering with my bug for a while to get a smooth acceleration.
When gaining speed i feel a lack of power, and higher in the revs it seems
like the the engine can't keep pace (like it won't get enough fuel).

It started when i changed the stock fuel pump with a brasilian one. Because
of a leak in the filter screen i used a sealant to stop the leak. (not
knowing the fuel would solve the sealant, the stock fuel pump got blocked)

First i played with the valves; tighter... looser...
Then adjusted the timing... Dwell... Points... All good, ...on idle!!

Friday i noticed that when accelerating out of a turn or roundabout for that
matter the car almost stalled. I was driving for my sister in law's wedding
so it was pretty bumpy for my passengers. (and nerve wrecking for me!) What
could this be? Just simply a dirty carb? I haven't changed the sparkplugs
jet, could that be a possibility too?

Any help is appreciated because in february (still a long time to go) it is
gonna be my wedding car and i do want a smooth drive

tia
Roger

Reply to this Message

Speedy Jim - 28 Aug 2005 14:34 GMT

> Hi ramva,
>
[quoted text clipped - 20 lines]
> tia
> Roger

This is a bone stock, all original 36HP '59 ???
Nothing changed (except the fuel pump)??

Signature

Speedy Jim
http://www.nls.net/mp/volks/

Reply to this Message

bug '59 - 28 Aug 2005 20:59 GMT

>> Hi ramva,
>>
[quoted text clipped - 24 lines]
> This is a bone stock, all original 36HP '59 ???
> Nothing changed (except the fuel pump)??

Sorry, forgot to mention.
34 HP industrial engine ('63?) Euro specifications (Swedisch engine)
So more or less stock

Roger

Reply to this Message

Speedy Jim - 29 Aug 2005 00:04 GMT

>>>Hi ramva,
>>>
[quoted text clipped - 31 lines]
>
> Roger

Stalling in the turn may be a clue. To me, that suggests
the carb is running very lean (power circuit, not the idle).
This might be caused by dirt/sealant in the Mian jet.
It can also be caused by the float valve maintaining too
low a level of fuel in the bowl.

I think I would begin by taking the carb apart and
blowing the jets/passages out with compressed air.

Signature

Speedy Jim
http://www.nls.net/mp/volks/

Reply to this Message

bug '59 - 29 Aug 2005 17:54 GMT

>>>>Hi ramva,
>>>>
[quoted text clipped - 40 lines]
> I think I would begin by taking the carb apart and
> blowing the jets/passages out with compressed air.

Thanks Jim.
I was hoping it would be something (simple) like that, but could not put a
finger on it.

Thanks again and i'll let you know what comes out (busy right now)

Roger

Reply to this Message

bug '59 - 30 Aug 2005 19:42 GMT

>>>>Hi ramva,
>>>>
[quoted text clipped - 40 lines]
> I think I would begin by taking the carb apart and
> blowing the jets/passages out with compressed air.

Hey Jim,

I cleaned out the carb today, lined up the main jet carrier (lining up the
hole of the main jet carrier with the hole in the carb housing by turning
the carrier ccw)
Tightened the solenoid (was hand tight) and re-installed the lot.
When putting back the carb on the inlet manifold i noticed the solenoid was
sitting on the generator. Is this a problem? Anyhow, the car drove perfect
after cleaning the lot but after another drive the lack of power was back as
never before!

It even backfires when accelerating (80km in third, hughe lack of power at
higher revs) ánd decellerating.
There is a little leak in the excaust due to a bad seal and clamb. This is
from day one though and it ran perfect before so i don't think this is the
reason...

The latest thing i have done is loosned the valves a little (0,02mm slith
through easily)

Is my problem still fuel related or will re-adjust the valves, changing the
plugs do the trick? Or is it wondering in the dark?
I must say it díd run fine for about a half an hour, so it sounds like i'm
in the right direction....

Cheers
Roger

Reply to this Message

Speedy Jim - 30 Aug 2005 20:37 GMT

<SNIP>

> Hey Jim,
>
[quoted text clipped - 23 lines]
> Cheers
> Roger

If it ran for half hour, you must have solved the problem
and then something happened. Same thing happened or different
"thing"?

Could be yet another lump of dirt got stuck in the carb.

Put 2 gaskets under the carb to raise it up a bit so the
solenoid has room.

I think I would blow the carb out again as the first step.

Signature

Speedy Jim
http://www.nls.net/mp/volks/

Reply to this Message

bug '59 - 30 Aug 2005 21:23 GMT

> <SNIP>
>>
[quoted text clipped - 36 lines]
>
> I think I would blow the carb out again as the first step.

Ok, thanks for the (speedy) advise.:-)
I have a half day off on friday so i'll do it then, when i'm at it, i'll
change the plugs and do the valves again, a little tighter though (massive
backfire related?).

Thanx,
Roger

Reply to this Message

Jan - 31 Aug 2005 07:43 GMT

> The latest thing i have done is loosned the valves a little (0,02mm slith
> through easily)

I'm sorry to butt into this conversation (yea right, haha!)

But did you make a typo there, perhaps you meant to say 0.20mm?

The proper clearance for aluminum pushrods in a fairly stock engine is
0.15 not 0.015 !!!

0.015 would go to ZERO when the engine warms up, and you would get leaks.

It works the other way with steel pushrods, then the clearance gets
bigger as the wngine gets hotter. It's because they have different
thermal expansion.

Jan

Reply to this Message

bug '59 - 31 Aug 2005 16:52 GMT

>> The latest thing i have done is loosned the valves a little (0,02mm slith
>> through easily)
[quoted text clipped - 13 lines]
>
> Jan

Yes you are right, i meant 0.20mm.
I think they are too lose now. will make a tight 0.20mm next friday
Thanks for the correction.

Roger

Reply to this Message