endless Hiccoughs and temporary cutting out.

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Jim H
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endless Hiccoughs and temporary cutting out.

Post by Jim H » Mon Jul 12, 2021 2:13 pm

Hi,
I'm at my wits end and need help, it's my only car and I've been on foot for 6 weeks now! the depression is getting all to real.

I've had my 92 GT2 EX Webber for about 18 months... The first year it was fine, but the day before the MoT (Christmas time) it started hestitating under harder acceleration, so I started going through the usual (I've had 3 before).

Since January I have replaced the vacum lines, dizzy, the filler neck, tank, all the feul lines, feul pump, swirl pot, carb flange, rebuilt the carb, and retimed it... and the feckin thing still won't run right..... it seems different every time I touch it (although that could me, my brain chasing it's tail).

I'm fairly sure the carb needs better fettling, but there is no point in doing that properly until the feul supply is consistent.
... if I boot it it Hiccough or grumbles (back off and reboot and it's usually ok).... going up a steep hill it kept trying to cut out..... it seems to be an intermitant feul starvation issue, not enough to cut out completely but only just - not sure how I made it up the hill to be honest. Nearly everything is new so I don't understand how this can be...... One thing I cannot seem to do for love nor money is get all the air out of the filter, which makes me suspect airlocks....how do I get rid of them? (I tried a vacuum pump... feul came through but the air stayed put).

I did try the 3 way split with the welding tip instead of the swirl pot, but that didn't seem to make any difference at all.... and it should run fine with the swirlpot anyway.

I'm tempted to try a one way valve in the inlet feul line, just as it comes out of the tank, to stop the line draining back into the tank, is this a good idea?

.... I honestly don't know what to do next and I'm close to tears of frustration, so any suggesting are welcome, please.



RussGLAuto
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Re: endless Hiccoughs and temporary cutting out.

Post by RussGLAuto » Mon Jul 12, 2021 10:05 pm

Sounds like you have done all the right things so far.

Do you still have the vapour trap fitted or was that removed with the Webber conversion? I have had a Webber fitted to my FR in the past, now back to the original Pierburg, on both setups there is / was always air in the fuel filter. Not sure that is your problem.

In any case, sounds like one of the jets in the Carb may be blocked. Have you had them cleaned out at all and / or the carb serviced? If not, try that as a starter for ten.


Daily Driver - 2017 Volvo XC90 T8 Twin Engine - Polestar - Arctic White
Weekend Wagon - 50k 1982 Mk2 Scirocco 1.6 GL Auto - Diamond Silver
Other Half's Wagon - 2008 Mazda 2 1.5 Sport - Cosmos Blue
Daughters Curb Scraper - 2016 Fiat 500 1.2 - White

Jim H
Posts:5
Joined:Mon Jan 13, 2020 8:08 pm
fill in the right answer:15

Re: endless Hiccoughs and temporary cutting out.

Post by Jim H » Wed Jul 14, 2021 1:22 pm

thanks.... I tried it with and without a new swirpot, didn'T make much if a diffetence.
I think I may have found a large part of the problem... the secondary main emulsion tube is a bit compresed/bent, the jet is 130 instead of 127 and my primary main air corrector was a 140 instead of 145.
bits on the way, so I hope that sorts it.



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C 20 CCO
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Location:Burnley, Lancashire.

Re: endless Hiccoughs and temporary cutting out.

Post by C 20 CCO » Thu Jul 15, 2021 4:55 pm

A new inlet manifold gasket did it for me, i like you went to the edge of sanity. Even with a vacuum gauge to test how strong the suction from the pump was. In the end the gasket was my saviour. Fiddly but do-able as a diy.


kind regards,

Dave.

To be old and wise......
You must first be young and stupid!

Previously owned: 1984 1.6 CL in alpine white; 1986 1.6 GT in met light blue over black body kit; 1990 1.8 GT2 in silver.
Currently: 1991 GT2 in Pearl green metallic.

WreckTangle
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Re: endless Hiccoughs and temporary cutting out.

Post by WreckTangle » Mon Jul 19, 2021 1:55 am

I gave up on the Weber (fitted by a previous owner) and reverted to a Pierburg which I stripped down, cleaned, rebuilt and adjusted according to the service manual. This eliminated similar problems for me plus restored the benefit of an automatic choke.

Had I persevered with the Weber I would have checked the jetting like you have. I think it is quite common for them to be supplied wrong unless bought properly set-up from a reputable source. I would also have checked the float level and needle valve.

Has yours got the throttle body heater fitted? This part is transferred across from the Pierburg. Does it work and is it actually in contact with the throttle body? Mine wasn’t.



RussGLAuto
Posts:182
Joined:Sat Jul 14, 2018 11:51 pm
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Location:Spalding

Re: endless Hiccoughs and temporary cutting out.

Post by RussGLAuto » Mon Jul 19, 2021 1:50 pm

With you on that one WT! The Webber is (allegedly) set up for a 2E2 Carb, mine is a 2B5 hence the jets were incorrect. It was running so rich it was only delivering 16 MPG and an asthmatic 55 hsprs, not the 85 the FR should have.
VW Heritage UK & Webber boast a plug in and play set up for their carbs and infers that they are better than the original Pierburgs:

"To fit 1.6 engines with automatic transmission. This kit replaces the 2E2 Pierburg original caburettor which are known to have running problems."

Shame on VW Heritage for suggesting it is.

Now the original PB Carb is fitted refurbished with clean fuel it's running sweet as. Rust contaminated fuel manifested as difficulty starting, ran for 50 yards then lost all power and stalled.


Daily Driver - 2017 Volvo XC90 T8 Twin Engine - Polestar - Arctic White
Weekend Wagon - 50k 1982 Mk2 Scirocco 1.6 GL Auto - Diamond Silver
Other Half's Wagon - 2008 Mazda 2 1.5 Sport - Cosmos Blue
Daughters Curb Scraper - 2016 Fiat 500 1.2 - White