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Recent content by DennisK

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    Mercruiser 5.0 EFI 2001 with Idle problems

    Put new PCV valve in and checked hose.also runs great off idle, doubt vacuum leak. I think my scanner can adjust IAC motor, never tried it. Throttle is against idle screw. Maybe should turn it back conterclockwise slightly to hopefully lower idle? Difference now is it idles against the screw...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Hi CHS, Well back in the boat and making some progress with the idle being very smooth and not acting like it might stall but a little high at about 1,000RPMs. By the way it is Throttle Body and I put the data in the attachment to make some sense out of it. I replaced the alternator and belt...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Thks alot for your info. and I think we are on track in solving this . By the way it is Twin Mercruiser 5.0 EFIs 2001. I have swapped parts from the other engine and have also bought a new Quicksilver IAC and TPS and have taken the throttle body off and cleaned it and replaced with new gasket...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    When I would unhook the cable and lower the idle against screw it would stall but run OK with a high idle of 8 to 900. I guess a possible vacuum leak? Seems to be 2 opinions about throttle blades, one is for the blades to be shut and the other is to be open slightly so it can idle. Mine is shut...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    I did not see that option on the scanner so should not be an issue. The other thing I am not sure about is setting up the idle. Some Techs are saying have the throttle blades against the throttle body and let the IAC handle it from there while others are saying adjust the throttle blades just...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Yes you are right , my reading is in volts, starboard or good engine is .50 Volts and Port engine with idle issue is .74 Volts at an idle of 900RPM. Maybe getting that throttle against the stop screw will get the TPS down to lower volts with lower rpm. Right now if I did that the engine would...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Thks for your info. on my challenging issue. It is interesting what you are saying about my TPS which is reading 7.4 and I guess this is why my IAC reading is 0. I will first try to get the throttle against the stop screw which hopefully lower that 7.4 reading and also open up the IAC reading...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Thks for your reply. I am going to change that throttle body gasket and hoses and look for any small leaks. Strange thing is with the scanner the TPS value was .74 and IAC was at 0 with an RPM of about 900. Also going to adjust that throttle against the stop screw but when I did that it would...
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    Mercruiser 5.0 EFI 2001 with Idle problems

    Been dealing with idle issues for second season now and still trying to resolve it. I have a high idle and if you put the throttle against the idle screw it stalls out. Have replaced parts, TPS,Map and IAC and also switched ECM since I have Twins and no luck. Also have checked readings with...
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