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Message: [QUOTE="SPEEDDEMON31176, post: 89926, member: 2297"] It sounds to me like you have one or more bad o-rings on injectors. You eliminated the IPR, ICP, etc with your tests. If the HPOP was an issue it just wouldn't run period. I think you possibly damaged an o-ring on install or did you install the injectors without putting new o-rings on them? If new o-rings were they Alliant brand? If you have an oil pressure gauge for the HPO system then you could check each head and see which one has a lower psi which will narrow down the issue. [/QUOTE]

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