FUEL PROBLEM in mk1 1800 gti ONLY round right hand bends!

Hi I am new here. I am on my 2nd black mk1 gti 1800 (i also owned 3 mk2 gtis in the past) - Haven't crashed tho (touch wood), I have owned a few heaps lol

Just thought I'd ask before I get a new fuel pump,

Yeh my car stutters when going round right hand bends (not left ones) and roundabouts, but ONLY in 2nd gear when you "cain it" (total loss of power so you have to ease off totally) -  wth?!?! And yes there is plenty of petrol in the tank before you say

Definitly a fuel pump problem I think, just wanted someone to confirm this

But why does it only do it on right hand bends and not left ones

I have looked at all the archive stuff and been sitting here a couple of hours looking through previous posts (found one about stuttering up hills)

Cheers for your time

Jez

Put some more petrol in it or don't go fast round bends when tank is less than about 1/3 full. Common problem fixed in later GTI Cabrios and MK2s by having a lift pump in the tank.

i also hear that some new fuel tanks do not have baffles in them. don't know if this is true or not. does this happen with a full tank of fuel?

save your money don't by a new fuel pump yet. if you do the problem will still be there. have a read through some old posts.  from what i can remember  it can either be a gravity valve attatched to the filler tank or lack of baffles from a non gti or pattern fuel tank.   had same problem on mine but only if it went below a 1/4 and i took a long right hand bend fast, so i kept the tank above 1/4 full and had no probllems.  when it happens is it only as you go around the bend, splutters , but then back on the straight it returns to normal after a second or two ?

mk1jim said

save your money don't by a new fuel pump yet. if you do the problem will still be there. have a read through some old posts.  from what i can remember  it can either be a gravity valve attatched to the filler tank or lack of baffles from a non gti or pattern fuel tank.   had same problem on mine but only if it went below a 1/4 and i took a long right hand bend fast, so i kept the tank above 1/4 full and had no probllems.  when it happens is it only as you go around the bend, splutters , but then back on the straight it returns to normal after a second or two ?

Hi all, sorry to hijack thread now as well..

Just been for a little run in my new one, first time I've opened up a little, feels lnice, had a little blast up my local dual carriageway, got to roundabout at end, straight round it, fairly quick and got the same, lots of spluttering, I've just over 1/4 tank, but fine again once back on straight…
So i was thinking its obviously to do with force throwing fuel to left of tank but fuel pick thingy (whatever its called) is on the right. Is there a fix to this???
Never had this before on any other car and that includes my cabby, but thats Carb not GTI
any help or ideas would be appreciated as well

thanks

just a thought… correct me if im wrong and please dont shout or abuse me ops:  but…. isnt there like a swirl pot u can put inline that will help to overcome this? sure ive seen it somewhere?
 :dontknow:

I would expect an unbaffled tank or the accumulator is not working.

Unbaffled explained above

The accumulator should hold enough fuel and pressure for (I'm guessing) about 10-15 secs at max throttle when the main pump loses supply - that's what it's there for - to maintain system pressure and supply and smooth any transitions.

Be interesting to see by powering off the main pump while keeping feed to the ignition side.  I guess the old "Prowler switch" would do it.

Cheers

rich

crazyquiff said

I would expect an unbaffled tank or the accumulator is not working.

Unbaffled explained above

The accumulator should hold enough fuel and pressure for (I'm guessing) about 10-15 secs at max throttle when the main pump loses supply - that's what it's there for - to maintain system pressure and supply and smooth any transitions.

Be interesting to see by powering off the main pump while keeping feed to the ignition side.  I guess the old "Prowler switch" would do it.

Cheers

rich

a bit over my head there Rich, will have a natter at next berkshire meet if thats alright..

No problem Steve - you coming round this week?

crazyquiff said

No problem Steve - you coming round this week?

Was trying to but everything up in the air this week, but cant now, some works come in..
Might pop up tuesday next week if thats ok?

Would be fine

crazyquiff said

Would be fine

See you tuesday then Rich..
Willbring some cash as well, cos no doubt I'll be needing some bits
lol

I've got the right hand cornering problem too except I have other symptoms that are probably related:

1. Car takes ages to start when warm (ok when hot or cold).
2. Fuel leaks onto the floor by the offside rear wheel when the tank is brimmed. Can't see evidence of a leak when it's not full though.
3. Crap fuel economy

I haven't had a chance to investigate yet (moving house) but I'm thinking it will be a leak from a fuel pipe causing the pressure to drop. The tank and filer were replaced by the previous owner and apart from the warm starting she runs great.

Growers

Cheers for all your replies

mk1jim totally what you and others said about keeping the tank more than a 1/4 full

I actually did get a new fuel pump in the end, which cured a problem i had whilst starting, the same as :

Growers said

. Car takes ages to start when warm (ok when hot or cold).

Growers

Interesting to read what you guys said about a fuel tank with baffles, might look into that.

It is a Y reg '83 black 1800

I know the tank is pressurised - do you think it might be something like the pressure release valve stuck?

Also it is the design with just one fuel pump - underneath the tank by the wheel - no internal or 2nd pump

Cheers again

EZ
jez

Forgot to add that I will defo try changing the accumulator - sounds like the most likely fault - cheers guys

there is an anti-gavity valve  ( think thats what it's called ) near the top of the filler neck, read somewhere that can cause problems if it's not in the right position.   good luck,