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Slight misfire when idle, fuel pump relay?

  • Thread starter Deleted member 105879
  • Start date

Deleted member 105879

Guest
Hi, I am trying to solve this issue with my Altea 1.6 petrol (BGU)

When the engine is warm, there is a slight misfire running on idle on random cylinder, some cylinders misfire more, some less, approx 1 to 5 times a minute. If you rev it up and keep it at say 2000 rpm, there are no misfires at all. I monitored this live with diagnostic equipment. This error was also present.

1 Fault Found:
01259 - Fuel Pump Relay (J17)
009 - Open or Short to Ground

So far I have replaced the spark plugs and used Redex additive to clean up the fuel system/injectors, it did not fix my problem.

Trying to locate this Fuel Pump relay, searching on google it would seem it's under dash, but which one? Two white 449 relays are interior lighting and horn?, two black 404 seem to be both for windshield washers, both seem to click when I engage rear windshield wiper. Not sure about the others.

Observation - black 460 in the bottom right corner gets hot when car is running.

Please help me solve this problem.
 
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