Recent content by pinkhippo72

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    Air in fuel line?

    Hello, I have a 1997 Mercury 175 EFI. I have been having some issues with it to include running rough at idle, stalling at idle, and difficulty starting. It has new gas and we have replaced all the filters, checked and replaced lines, installed new pulse pump, checked vapor separator float...
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    MAP Sensor Mercury 175 EFI

    Hello, I am in an ongoing process of troubleshooting some issues with my 1997 Mercury 175 EFI. I am beginning to suspect the MAP sensor which is located inside of the ECM. Does anyone happen to know if it is possible to replace the sensor? I can't find it anywhere online for purchase...
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    Merc 175 idle/running issues - IAC (idle air control)?

    Hello, I have a 1997 Mercury 175 EFI and it is running rough at idle (around 500 rpm) and dying after a couple minutes. As it gets a little warmer it will run for a couple more minutes, but still dies. If I try to add any throttle it dies immediately. The compression checked out fine and I...
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    Mercury 175 EFI issue

    Hello, We've been troubleshooting for several weeks so any help would be greatly appreciated... Here's the issue: Our Mercury 175 EFI will start up and run really rough and shudder at idle (around 500 rpm). If left to idle it will die usually within a couple of minutes. If we try to advance...
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