Hi folks been some time since I've posted on the forum.
This car has been sitting for 3+ years at a local shop they where unable to get it started. So I made and offer and bought the car and had it towed to my place.
Keys had been lost so had to get that sorted first . Got a new key made It's been coded but the central locking still doesn't work tried the programing procedure but still nothing.
Once I got the car home I checked the obvious tested the ecu, fuel and spark, removed the cooler and pulled the line off the rail and no fuel was coming through, I proceeded to lift the back seat to hear the pump and I got nothing checked out the necessary relay and fuses all tested good.
Removed the pump from the tank and bench tested it and confirmed the pump was dead. Striped it open in the hopes of checking the brushes to get a quick fix this is now late night desperation
. On getting it open it was a shocker the pump was seized up and filled with rust and sludge. At this point I'm excited that I found what could be the main issue.
Next step before fitting the new pump was draining out and cleaning the the tank and fuel lines, got that done. I struggled to find a pump locally so I matched one up I found that the Mk3 /MK4, Polo pumps are an exact fit pressures range from 3 to 4bar I opted for the MK4 pump which measured 4bar the cooper S pump rating was 3.5bar so I decided to give it a shot. Also replaced the in tank filter which comes with new o rings and the locking ring seals for both the pump and filter. I've found that the O ring on the filter housing must be replaced if it is damages or kinked you will not get fuel pressure to the rail as it will leak in the tank and not build pressure. Connected up the battery and violla I was in business I had fuel in the line turn the key on and off a few times to call the fuel to the front. Put the fuel line in a small come bottle or similar.
Once that was sorted i fitted the fuel line back on the rail and then the cooler.gave it a crank and it started on the fist turn
.
However I had a rough idle, I continued to diagnose the issue, I could not find anything I thought it might be a sucking air when I took out the cooler so I removed it again. At this point I decided to check the fuel rail injector O rings to my suspicions they where severely worn out. I got 8 new ones and replaced them, the ones on the top of the rail were fine but replaced them anyway got that reassembled and that solved my erratic idle issues.
Sent from my SM-A217F using Tapatalk
This car has been sitting for 3+ years at a local shop they where unable to get it started. So I made and offer and bought the car and had it towed to my place.
Keys had been lost so had to get that sorted first . Got a new key made It's been coded but the central locking still doesn't work tried the programing procedure but still nothing.
Once I got the car home I checked the obvious tested the ecu, fuel and spark, removed the cooler and pulled the line off the rail and no fuel was coming through, I proceeded to lift the back seat to hear the pump and I got nothing checked out the necessary relay and fuses all tested good.
Removed the pump from the tank and bench tested it and confirmed the pump was dead. Striped it open in the hopes of checking the brushes to get a quick fix this is now late night desperation
. On getting it open it was a shocker the pump was seized up and filled with rust and sludge. At this point I'm excited that I found what could be the main issue. Next step before fitting the new pump was draining out and cleaning the the tank and fuel lines, got that done. I struggled to find a pump locally so I matched one up I found that the Mk3 /MK4, Polo pumps are an exact fit pressures range from 3 to 4bar I opted for the MK4 pump which measured 4bar the cooper S pump rating was 3.5bar so I decided to give it a shot. Also replaced the in tank filter which comes with new o rings and the locking ring seals for both the pump and filter. I've found that the O ring on the filter housing must be replaced if it is damages or kinked you will not get fuel pressure to the rail as it will leak in the tank and not build pressure. Connected up the battery and violla I was in business I had fuel in the line turn the key on and off a few times to call the fuel to the front. Put the fuel line in a small come bottle or similar.
Once that was sorted i fitted the fuel line back on the rail and then the cooler.gave it a crank and it started on the fist turn
. However I had a rough idle, I continued to diagnose the issue, I could not find anything I thought it might be a sucking air when I took out the cooler so I removed it again. At this point I decided to check the fuel rail injector O rings to my suspicions they where severely worn out. I got 8 new ones and replaced them, the ones on the top of the rail were fine but replaced them anyway got that reassembled and that solved my erratic idle issues.
Sent from my SM-A217F using Tapatalk
Last edited:
haha
