Subielife Posted December 24, 2023 Report Share Posted December 24, 2023 Hi all merry xmas, Needing a little help . Had my car all running pretty sweet and dyno tuned but then i went and upgraded my fuel pump and now am not able to get any fuel pressure. Have confirmed fuel to the fuel pressure regulator on both sides (split fuel rails) but not getting enough pressure to bypass the diaphragm and out the return line. Any help is awesomely appreciated Quote Link to comment Share on other sites More sharing options...
k4nnon Posted December 25, 2023 Report Share Posted December 25, 2023 If everything was working fine before and the only thing changed is an upgraded pump, then I would double check the pump install and the basket. Iv seen many torn o rings or not crimped hoses. Some pumps need 2 or even 3 o rings around the neck to seal properly. Also maybe compare the pump body length of the new and old pump. If the new pump is shorter and didnt come with a larger seat then its pressure may be forcing it back and out of place. If nothing changed with lines or regulator then I would double check everything is good with the pump and basket itself. Best of luck! Happy Holidays. Quote Link to comment Share on other sites More sharing options...
neil brown Posted December 25, 2023 Report Share Posted December 25, 2023 put the old pump back in if runs fine with that, check out the new pump and could be a faulty batch k4nnon 1 Quote Link to comment Share on other sites More sharing options...
Subielife Posted December 27, 2023 Author Report Share Posted December 27, 2023 On 12/25/2023 at 1:21 PM, k4nnon said: If everything was working fine before and the only thing changed is an upgraded pump, then I would double check the pump install and the basket. Iv seen many torn o rings or not crimped hoses. Some pumps need 2 or even 3 o rings around the neck to seal properly. Also maybe compare the pump body length of the new and old pump. If the new pump is shorter and didnt come with a larger seat then its pressure may be forcing it back and out of place. If nothing changed with lines or regulator then I would double check everything is good with the pump and basket itself. Best of luck! Happy Holidays. it was exactly this. Had to add an extra oring. THanks for the help k4nnon 1 Quote Link to comment Share on other sites More sharing options...
k4nnon Posted December 27, 2023 Report Share Posted December 27, 2023 @Subielife awesome! glad to hear you solved the issue. believe it or not iv seen that many times. Quote Link to comment Share on other sites More sharing options...
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