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International 4700 DT444E


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thexpress2002
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Dec 14, 2011, 3:55 PM

Post #1 of 4 (5203 views)
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International 4700 DT444E Sign In

I have an International 4700 DT444E. She starts right up. Runs strong. Engine warn light comes on and I have no throttle response. The engine does not stall and continues to run. After 2 mins the light will shut off and throttle response returns for a period of time before the light comes back on.
I have taken off the throttle sensor and the readings are amooth when engaging but then OL at a certain point.
Thoughts?


Discretesignals
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Dec 14, 2011, 6:55 PM

Post #2 of 4 (5178 views)
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Re: International 4700 DT444E [In reply to] Sign In

Probably going to have to hook up a scan tool to that and see if any codes are being stored. You may have caused a TPS code by unplugging it, so you'll have to clear any TPS codes out of history. With the scan tool you can monitor the TPS voltage the computer is seeing.

If your getting dead spots (OL) doing a TPS sweep, you could have a faulty TPS.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 14, 2011, 6:56 PM)


thexpress2002
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Dec 14, 2011, 7:19 PM

Post #3 of 4 (5173 views)
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Re: International 4700 DT444E [In reply to] Sign In

Thank you for responding. The reason for disconnecting the tps was due to running diagnostic test on the truck. codes came back with reason to believe this was the issue.

When disconnecting tps, placed the volt meter on it, it smoothly increased and decreased, but OL when "floored"


Discretesignals
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Dec 14, 2011, 7:45 PM

Post #4 of 4 (5166 views)
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Re: International 4700 DT444E [In reply to] Sign In

I'm not a heavy diesel mechanic, but the TPS should work the same as it does in a gasoline engine.

You must be testing resistance with a ohm meter to be getting an OL reading. The TPS on a gasoline engine would go OL if there was an open in the TPS sensor. Your meter can also go OL if the reading is out of the scale it is set on.

Another way to test it is to back probe the TPS connector with the tps installed. There should be three wires on the connector for the TPS. That is unless it has another circuit for a close throttle switch.

You back probe the connector at the signal return wire, which is usually the middle wire on a three wire TPS. The other end of your volt meter gets hooked to ground. Turn the ignition on and you should see voltage sweep in a linear fashion for something like .6V to 4.5V. That is if the sensor is getting a 5 volt reference from the computer.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.




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