Chrisbeast Posted November 24, 2020 Share Posted November 24, 2020 Evening all. My car died on me the other day after checking through the usual suspects i have narrowed the problem down to the fuel pump ecu. I have attached a pic of the ecu, after looking carefully the only thing standing out is the green block which looks to of popped/melted! Is there anyone on the forum who could repair this for me? Regards Chris. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 24, 2020 Share Posted November 24, 2020 What fuel pump are you running? Sometimes aftermarket pumps can put too much draw on the factory fuel ecu and cause issues like this. Personally I wouldn't try to repair it. Just replace it with a relay, or another second hand unit. Quote Link to comment Share on other sites More sharing options...
Chrisbeast Posted November 24, 2020 Author Share Posted November 24, 2020 Hi ya, thanks for your reply. The fuel pump is stock. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 2, 2020 Share Posted December 2, 2020 It can be removed and replaced by a simple 30 Amp relay if you can't find a good used one. I have never had a problem with one so haven't had cause to try and effect a repair to the actual control unit. It uses PWM to control the fuel pump voltage to aid fuel heating and current consumption. It's probably quite a complex circuit. 1 Quote Link to comment Share on other sites More sharing options...
Chrisbeast Posted December 3, 2020 Author Share Posted December 3, 2020 On 12/2/2020 at 2:02 PM, Chris Wilson said: It can be removed and replaced by a simple 30 Amp relay if you can't find a good used one. I have never had a problem with one so haven't had cause to try and effect a repair to the actual control unit. It uses PWM to control the fuel pump voltage to aid fuel heating and current consumption. It's probably quite a complex circuit. Ok Chris, thank you for that. Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted December 4, 2020 Share Posted December 4, 2020 I had the exact same happen to mine too and I managed to change it with a replacement capacitor. If you want I can see what the replacement was that I used? Quote Link to comment Share on other sites More sharing options...
Chrisbeast Posted December 5, 2020 Author Share Posted December 5, 2020 8 hours ago, bonus_2000 said: I had the exact same happen to mine too and I managed to change it with a replacement capacitor. If you want I can see what the replacement was that I used? Hi thanks for your reply, yes any info would be much appreciated. Regards Chris. Quote Link to comment Share on other sites More sharing options...
erachter Posted December 5, 2020 Share Posted December 5, 2020 I have a spare fuel pump ECU from a UK TT auto, let me know if it would be of any help Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted December 5, 2020 Share Posted December 5, 2020 8 hours ago, Chrisbeast said: Hi thanks for your reply, yes any info would be much appreciated. Regards Chris. Hi Chris, See the attached photos of the one that came out of mine, almost identical damage to yours. What you can't see until you disassemble the unit is the value stamped into the top of the capacitor. I ended up ordering a replacement from Farnell, part number was R60EN4470AA30K 4.7 micro farad capacitor. That was the only model capacitor that was dimensionally correct to fit back into the ECU housing and the pins at the correct spacing. Link below. https://uk.farnell.com/kemet/r60en4470aa30k/cap-4-7-f-100v-10-pet-radial/dp/2763181?scope=partnumberlookahead&ost=R60EN4470AA30K&searchref=searchlookahead&exaMfpn=true £1.58 each, and easy enough to fit if you can use a soldering iron. Mine seemed to work fine again after fitting it. 1 Quote Link to comment Share on other sites More sharing options...
Chrisbeast Posted December 5, 2020 Author Share Posted December 5, 2020 2 hours ago, bonus_2000 said: Hi Chris, See the attached photos of the one that came out of mine, almost identical damage to yours. What you can't see until you disassemble the unit is the value stamped into the top of the capacitor. I ended up ordering a replacement from Farnell, part number was R60EN4470AA30K 4.7 micro farad capacitor. That was the only model capacitor that was dimensionally correct to fit back into the ECU housing and the pins at the correct spacing. Link below. https://uk.farnell.com/kemet/r60en4470aa30k/cap-4-7-f-100v-10-pet-radial/dp/2763181?scope=partnumberlookahead&ost=R60EN4470AA30K&searchref=searchlookahead&exaMfpn=true £1.58 each, and easy enough to fit if you can use a soldering iron. Mine seemed to work fine again after fitting it. Hi. Thank you so much you are a star! Regards Chris. Quote Link to comment Share on other sites More sharing options...
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