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SC WI | Well it could be a lot of things with the fuel rail pressure easiest place to start would be looking at the tune, but in leu of that could use a scan tool to log and monitor what it’s actually doing. Then go from there, without knowing who tuned it, you don’t necessarily know whether or not you have a good tune.0087 code? It could be calling for to much rail pressure and tripping the FPRV or to much fuel and it’s falling below parameters, a weak FPRV. Need to try and find out who tuned it and log it to know what’s going on. | |
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Duramax machinery
