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Knock sensor and ECT sensor 700 1991

posted by  motorD on  Mon Feb 5 08:51 CST 2018
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Ran a fuel pressure test this weekend. I was getting all of 20 psi at the rail. I swapped out the FPR and nothing changed. After pulling the fuel pump out I saw that the rubber fittings around what I assume is the check valve are rotted out. I am going to remove the valve for testing purposes to see if there was fuel leaking around that area causing the lack of pressure. I should be able to make some new fittings if I cannot find any replacements online. One question I have at this point is if I have the correct pump. My 740 has the Rex Regina system. If this pump is for the Bosch system would it have less pressure? Or, are the pumps the same for both systems?






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