t25 1.9 petrol cutting out

[Andythesweep]

Thanks guys,here's the lowdown!
Bought the 1988 t25 1.9 yesterday,guy tells me it hasn't been run in a while,he tells me he recently serviced van,put new fuel pump on,new dizzy cap and rotor arm,new ht leads caps and plugs,new oil and filter,new breather pipes.i pick the van up,drive the two miles home and the van cuts out on me twice,not idling at a junction but moving at 40ish.today I have swapped distributor and ignition module thing with a friend,put on new fuel filter,checked all wires I could see,checked little witch hat type filter in carb inlet (clean) all to no avail.also tried running without air filter,makes no difference.
Basically it seems to run fine until choke goes off

[kevtherev]

does it backfire or pop on the overrun?

[Andythesweep]

does it backfire or pop on the overrun?

Not noticeably when the choke is on but it seems as soon as the auto choke clicks off it will die,sometimes I manage to keep it alive and it kangaroos a for a few yards before stopping and refusing to start unless I wait for a minute,then it will fire up no problem only to do the same a couple of minutes later

[kevtherev]

auto choke doesn't click off, it takes about 5 mins for the choke to gradually open fully from cold.
with the choke off, if you have an air leak on the induction side the engine will either falter, hesitate, misfire or stall.
check for leaks
vac hoses
brake servo hose
choke pull down unit (pull pipe off the carb and suck, if you can keep sucking it's shagged)
gaskets
second stage throttle diaphragm
distributor vac advance unit

Check the choke action from cold.
remove the pancake duct and observe the flap opening.
At cold there should be a 3mm gap
the gap should open if you open the throttle with the engine running

[Andythesweep]

Thanks kev,will try that in the morning

[l3jnx]

Hi
dont know if it will help but ive had two of these and a mk 1 golf with the same prob,i tried everything and on all three it was the hall sender in distributer, as they get to engine temp they the contact is lost and you loose spark.

[Andythesweep]

Thanks for the advice guys,can anyone point me in the direction of where I can but a replacement dizzy? Had a look on eBay but couldn't see one the same?

[kevtherev]

what?
the whole thing?
they rarely fail, so whats up?

or do you mean the hall sender unit?

[Andythesweep]

Kev,I have tried another distributor and it still had the same problem but there's a chance that dizzy was faulty too as it was knocking around a friends workshop,I was thinking if I could get one that I knew was 100% I could rule it out the equation.what is the best way of checking for leaks? And how do I check the secondary throttle diaphragm? Cheers

[kevtherev]

What do you think is wrong with the distributor?
it's just a spindle with mechanical spark advance weights on.
The hall sender is the important part, this is attached to the distributor and this tells the ecu that it needs a spark.. at that time, which in turn tells the coil to give out a spark.
if this fails no spark is issued from the coil.


for leaks use carb cleaner spray on the areas where leaks occur, and listen for the engine to change note.

[Andythesweep]

PROBLEM SOLVED!!! After all that I took the fuel filter off again and blew down the fuel pipe towards the tank,there was big resistance,blew even harder there was a bubbling sound and I could then blow through to tank,just came back from a drive and all seems to be fine,I feel like a proper pillock! Will clean the fuel tank out tomorrow.
Thanks everyone for all your help and advice

[kevtherev]

I edited my last post as I re read your first.... and decided not to include checking the fuel filter.. a lesson to us all

[ajsimmo]

I never thought of that because I thought you said it happens on petrol and lpg, then I looked back and saw it was one of the 3 other people on the thread with similar problems.
Lesson for me - read posts again (and notice names) when revisiting a thread!
Glad you sorted it and thanks for the update (many don't bother to return once fixed). BTW I wonder what happened to Hives?

[Andythesweep]

At the end of the day I suppose I've learnt a bit about my van so that's good. Now to start thinking about making her look good!

[nexttouseless2012]

Hi all, I previously joined this thread at the top of page 3. Been having the same problem of my 1986 1.9 DG cutting out and dying once the engine warms up. I've changed a fair bit on it so far and thought i had it sorted after finally changing the air filter. It has been running fine for the last 3 or 4 weeks....... but after it stopped on my wife this morning on a dual carriageway seems i'm back to square one.

Brief history - Van runs on Petrol and LPG, started cutting out and dying when engine reached temp. So far replaced air filter, HT leads, rotor arm, distributor cap, coil, ignition amp.

Checked for a spark after it broke down this morning and there was none. it has been previously suggested that i change the Hall Sender, only problem is i can't really check this against a good one, and as it seem's so intermittent i am a bit wary of spending another £100+ in case i'm still left with the same problem.

Does anyone have any ideas?

Cheers