lukeduke Posted August 21, 2013 Share Posted August 21, 2013 I can't seem to figure this out. I have no responce when I hit the throttle. I'm wondering whats the best method to fix this problem the "TPS" came up when I got dyinostics checked. But Im wondering if I can check the voltage and what it should be. Anyone have the same problem or think what I could do to fix this would help alot Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/ Share on other sites More sharing options...
GearheadGrrrl Posted August 21, 2013 Share Posted August 21, 2013 Not sure what the voltage specs should be, but the "throttle" is just a rheostat hooked to the pedal. Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/#findComment-200971 Share on other sites More sharing options...
bbigrig Posted September 8, 2013 Share Posted September 8, 2013 Your TPS sensor is a potentiometer. It works off of 5 volts coming into the sensor. anything less then .25 of a volt it gets a low voltage code. anything more then 4.75 volts is a high voltage code. No voltage heading back to ECM from TPS for 5-7 seconds is a code for no signal from TPS or signal drop out. should have 3 wires, (5 volt feed--signal back to ECM--ground) Find out what the code is for and use this as a map to figure it out. if its a 5 wire TPS it doesn't use 2 of the wires unless it is Cummins powered. Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/#findComment-204648 Share on other sites More sharing options...
keg1 Posted September 13, 2013 Share Posted September 13, 2013 I had a wire break at the throttle pedal on my 2000 Ch. It would idle but nothing when you stepped on pedal. Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/#findComment-205948 Share on other sites More sharing options...
gearhead204 Posted September 14, 2013 Share Posted September 14, 2013 sorry guys I don't have a new enough truck, but you can test most potentiometers with a multi meter on the ohms setting with the pedal unplugged . using the ground and the signal termanals in the throttle side of the plug,connect the meter then slowly depress the pedal and you should see a value count up or down depending on arrangement of the switch if you see gaps in the counting [dead spots] replace the switch. Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/#findComment-206020 Share on other sites More sharing options...
lukeduke Posted June 23, 2014 Author Share Posted June 23, 2014 OK still having problem k just bought a new pedal tps I plugged it in. I still get code 5-2 says high voltage. Now can anyone tell me how I can fix the voltage problem. Or what causes that error to happen. Any help welcome Quote Link to comment https://www.bigmacktrucks.com/topic/32406-no-fuel-when-stepping-on-throttle-1998/#findComment-250281 Share on other sites More sharing options...
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