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Showing results for tags 'rough idle'.
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Anyone have any experience with the 2013 era VP 5.7 V8-300-C-A(AQ) where the IAC and the TPS are integral to the throttle body? I am experience all the classic symptoms of a failed IAC - runs rough at idle speed, signs of running rich on the plugs & O2 sensors. Seeing Pending Codes SPN-4239, 4238 & 4236 using a TechMate Pro Have recently changed plugs & wires; next step is to try new PCV Runs great at speed My version indicates the IAC & TPS are not maintainable or repairable. Other than swapping the throttle body from the other engine, any suggestions on how to nail down with certainty that it is the IAC - really don't want to shell out the 550 deer unless really necessary. Any aftermarket rebuild kits that anyone knows of? Another question - what are the proper mV readings for the O2 sensors that I should see on the scanner? The sensors before the cat are not steady - one side is 745-750 mV and the other side is 870-880mV. Both downstream of the cat read 1244mV Thanks
Hello All! My Chaparral H2019 Sport with a Volvo Penta V6-200-SX rough idles and stalls. Out of the water she gets up to 5000 RPM, but in the water she goes up onlyto 2000 RPM and when in idle she stalls and turns off. The Alarm beeps every minute or so. The boat has only 29 hours of operation but has been stored for long periods of time. I drained all the fuel in the tank, changed the fuel filter two times, and checked the spark plugs. What would be the next step? I would Appreciate any help.