Hello everybody. I have been having a recurring issue with my car where I’m always jumping to 60 psi fuel pressure randomly when I should be reading 40 psi. This has been causing my car to idle rough and stumbly. It drives fine when I’m on the gas. I’ve checked and changed the frps, fpdm, fuel pump and ccrm. I’ve checked all the wiring for all these as well for shorts and grounds. I’ve checked for vacuum leaks and no leaks were found. I checked the wiring to the pcm as well and it showed no issues as well. I’m thinking it could be an alternator ac ripple issue or a possible pcm issue. I did change my cam to a bigger cam and put new larger headers on it a couple months ago. I’m at a loss on what to do next and any help would be appreciated. Thanks.
