fuel pump

hi could any body help me please having issues with fuel to my 20v conversion . i have put a 3.0 to 3.8 bar pump on . some times runs great other times wont rev and crawl home on tick over … would putting two pumps in gain anything or not its grav fed  . some times prime it comes back into tank as should other times wont even return it . any ideas or help please as getting bored fast with it now ! thanks for help yet again haha 

Do you have a lift pump feeding your injection pump? Do you have a swirl pot in your system?  Was it originally a gti? 

I had to change my supply pipes to 8mm internal diameter as mine was originally a 1300 small block.

I have a redtop facet feeding a 1 litre swirl pot.  Then my bosch 044 feeds my fuel rail from there.

Standard mk1 fuel pumps are good mega bhp.

Sounds like you have other issues!

My pump was noisy and poor fuel delivery but still drove ok. (Till it totally packed in)

hi yeah it was a 1.8 gti originly and yeah done all lines to 8 mm through out its working great now . took tank out cleaned it out was full of so kept on starving the pump causing lack of fuel ... but as per fix one problem gain a new one :L ... it now runs on 2 cylinders . no spart to 1 and 3 but if change coil packs with 2 and 4 it sparks so not coil packs . just reading up some body saying could be icm .. but its not putting any codes up or would it not ? getting close to going on ebay i know that much :L just got m.o.t on friday and now its not even worth trying to drive :L

mk1 pumps run at 0.2 to 0.3 bar unless its been changed in its life . a 1.8 t needs 3 bar of pressure to run properly iv got a 3.0 to 3.8 bar pump on now all fueling side great now but as say lost spart to cylinders 1-3 . i have changed coil packs with 2-4 but still no spark . put the coil packs from 1-3 onto 2-4 and they spark so coil packs are fine i have tried spare coil packs to to rule it out but nope still no spark .

Mk1 golf gti fuel pumps run at 5 to 6 bar pressure not .2 or .3 you must be looking at carb feed cars?
later cars with bigger fuel tanks (space saver wheels) also have a lift pump in the tank.

http://www.ebay.co.uk/itm/VW-Golf-MK1-1-6-1-8-GTi-1976-1993-New-5-Bar-In-Line-Fuel-Pump-/181369864965?pt=LH_DefaultDomain_3&fits=Model%3AGolf&hash=item2a3a7c8305
 

hmm just what got off auto data … that no longer problem any way    trying to work this no spark problem out … i have no sprak to 1 and 3 .. but reading up people tend to only lose one cylinder . and leads to icm … but yet to read about on been two cylinders . but could it be any help ideas would be great . don't want to put more money into something that not going to fix it  
thanks guys

That's the same pump I've just fitted 👍🏻  Bosch 044 can handle 600 bhp plus standard mk1 about 550bhp.

Ill ask on the page "mk1 golf 20v conversion" page" some cleaver guys on there with this conversion.

What engine code is it?

They are suggestion you check the loom as it runs near the turbo and can melt.

Maybe swap the loom first.

Can you check voltage pulses at the coil pack connections?

More reply are saying loom.

About £40 from tps.

hi thanks for the replay . i have tested the loom to the icm and there is no brakes in it . so can only be icm or the ecu from what i have read it is agu . and apparently common fault is the icm just stop working . loom is sat along the top of engine gets hot but has not broke any wires as can see and done test through them all good .

It's stamped on the left side of the engine the cost isn't it?

If someone suggested if it's an agu it can be the ignition amplifier.

If you have checked continuity with a multimeter on all wires then it's must be ok.

yeah that the park i am meaning icm call it two diff things depending on where you get it . 5 pin one side 4 pin other 4 pin side is to the coils 5 pin is power into it ect from ecu .

i have ran all wires from the icm to the coil packs they are all good .

i have swapped coil packs around with once known working .

iv swapped the coil packs not sparking to the cylinders sparking and they spark . so coil packs are all good .

iv brand new plugs in and still no spark .

so the loom . the coil packs . the plugs . are known to all be good . so from the icm to the ecu lies the fault so doubt been ecu and not wanting to play with that    so will try a new icm if solves it ace if not car will go on ebay       

have you got it mounted on the heatsink and fitted somewhere it can get good airflow? if not they can fail. the factory location is bolted on the side of the airbox so they are kept nice n cool

(A reply from Facebook)

dose the auq engine use the same icm control unit ?

and no was just in the bulk head all though this time will be bolted down some where out way of heat !! bloody thing !! thanks for your help though much much appreciated .

whittleos said

dose the auq engine use the same icm control unit ?

I'm not sure but ive asked 👍🏻