Tweet
Hello to anyone who might have an idea for me. I have twin 2007 175df motors on a charter vessel I use every day. Over the last year or so, the port side engine (about 1300 hrs) has what acts like a fuel starvation issue at certain speeds. I cruise the engines at 3900, and at that speed (and occasionally at other speeds) the engine looses power and wants to miss fire until I adjust the speed. It seems to run fine at high rpm, but has a few spots where it does not want to run. I get a code for the throttle position sensor, but I can't buy the tsp without the throttle body.(ouch!) Any ideas? Thanks.
-
-
The only thing you can do, since the TPS is not adjustable, is to check the wiring for continuity, and check the TPS to see that the resistance changes and is within specs as the throttle is opened and closed. If the TPS checks out, double check the wiring and the connections for corrosion, etc. both at the TPS and the ECM. If the TPS itself is out of specs, looks like you're gonna be out some dough.Mike
μολὼν λαβέ -
The best way to check a variable voltage throttle position switch is with a scope or high speed digital multimeter while it is still connected to the circuit. If you are handy with a multimeter you should be able check the switch to see if it is faulty. Switch the multimeter to volts turn the ignition switch on and test the switch at the throttle and at the ecu, at closed throttle you should see around one volt and gradualy open the throttle and the voltage will change as the throttle is opened, wide open throttle about four volts, as you are opening the throttle gently tap the switch and see if the voltage drops to zero. Make sure you are on the signal line wire when checking.Originally posted by Harper View PostComment
Comment