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Discussion Starter #1
Hi guys.
Does any of you know how to test a fuel pressure regulator fpr? I have a lucas 3.0 bar.
I have been thinking maybe it can be bad! I have some trouble with ignition knock on my c900 turbo 16 from 1990 with lucas inj. The problem comes and goes! It is very strange!
Can it been anything else?

I have replaced the sparkplugs and rotor and distributor cab + ignition leads!
 

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Discussion Starter #2
I can see more knock with heavy load. If I got other people in the car, and in 4 + 5 gear from low revs and the gas pedal pressed all the way down!
 

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Do this! I had similar prob with my ATTENTION: 3.3 bar FPR. Difficult cold start, hot start etc. I can't see any other way than taking the car to the garage. It's not so difficult and definitely quite cheap operation.
 

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What grade fuel are you using?
 
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