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timspu timspu is offline
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Join Date: Jul 2012
Location: Devon. UK
Posts: 218
Garage
I think i have found an issue, if i pull the relay for the front fuel pump to stop it running my rear pump is very noisy and fluctuates in pressure between 5 bar and 5.7 bar.
With both pumps running it is quiet and get 6.2 bar. So i think the rear pump just cavitates without the front pump on.
I have a feeling the rear pump is intermittently failing so when on boost i don't have enough control pressure to keep it above 10.2 AFR.
Can anyone confirm if the rear pump should be able to provide over 6.2 bar without the front pump on?
Thanks
Old 05-04-2013, 12:06 PM
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