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2001 21v Running rich 350 Mag MPI Ski

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    #31
    Okay so Iv a bout had it haha. Fire up idled great for a few mins but now it’s dieing after idling for about 5 seconds. I’m going back to check out the firing order and spark plug wires. is this cylinder 1 in your boat also?

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      #32
      gumby hey can you take a picture of your distributer cap and point out which wire goes to cylinder one on your boat. I think something might be funky with mine.

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        #33
        Find your #1 take out #1 spark plug put your finger over the hole have someone bump the motor till it comes up on compression stroke. Now align the timing making on the balancer to TDC (Top dead center) pull the Distributor cap where the rotor is pointing is # 1. Period !!!!!!!! Someone could have had that distributor out and didn’t put it back in correctly and made your one clock differently.

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          #34
          Okay so I did do it correctly, so after I find TDC I just go counter clock wise one post after another to the corresponding cylinder 18436572 and Tada firing order is correct. Figured I would check it a third time. I’m about to throw in the towel. Every time I find something wrong and fix it, it starts up with a new problem. First it was running rich but idling fine now I cleaned and replaced injectors and it ran amazing for about 5 mins then it went back to rough running missing cylinder #7 and stalling after about 10 seconds of idling. This thing has me stumped.

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            #35
            snowmandopeman Pm sent

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              #36
              Pulled the fuel pump it’s some sort of knock off one so I’m gonna replace it while I have the cool fuel out I did notice a little bit of gunk on the regulator screen but didn’t seem like enough to cause fuel issues. Do the fuel pressure regulators go bad very often and is it worth replacing, they want like 190$ for it is the reason I’m asking .

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                #37
                Just for clarification, after you determine where TDC is AND attach the number 1 spark plug wire there, you go CLOCKWISE 1-8-4-3-6-5-7-2 around the cap as you look down on it from above. Above you listed you went counterclockwise and if you did it that way, it will run but not run very well.
                Fixing everyone elses boat just so I can use mine...

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                  #38
                  yes sorry I meant to say clockwise. I have taken apart the entire fuel system and cleaned it out very well. Figured while I’m waiting on parts try and get this thing is the best shape I can. Do you think I should replace the fuel pressure regulator while I have everything apart or do they not typically go bad.

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                    #39
                    We replace them because typically the brass fitting that screws into the old pump will break when trying to remove it. They're expensive at around $280 for all the fittings and regulator but again, not easily accessed and definitely worth the piece of mind.
                    Fixing everyone elses boat just so I can use mine...

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                      #40
                      well shop said it seems like the ECM is failing, so they are going to send it out for testing and possible repair, if it cant be repaired its seems like I might be SOL

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