Okiki Olufokunbi Posted June 4, 2013 Share Posted June 4, 2013 Hello,My 94 CH613 with an E7 (non etech) engine just puked a code 3-3 on me . This is supposed to be a loss of signal from the injection pump speed sensor.Can someone help with exactly where this sensor is on the pump? a photo of it would be helpful too.Is this repair typically a wiring fault, or do these sensors really go bad . I can also appreciate it if I can find somewhere online (or local to Houston) to buy this part.ThanksOO Quote Link to comment https://www.bigmacktrucks.com/topic/31437-94-e7-ch613-code-3-3/ Share on other sites More sharing options...
rsb502 Posted June 5, 2013 Share Posted June 5, 2013 go to Mack to get the sensor, one on the pump one on the left side of the engine near the back on the bellhousing under the firewall. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/31437-94-e7-ch613-code-3-3/#findComment-187056 Share on other sites More sharing options...
theakerstwo Posted June 5, 2013 Share Posted June 5, 2013 First because its got thatcode does not mean it needs a sensor. I know that is the easy thing to do first but that code mean to and fro including the sensor fault. So chck for loose or broken wires. It happens. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/31437-94-e7-ch613-code-3-3/#findComment-187060 Share on other sites More sharing options...
staxx Posted June 6, 2013 Share Posted June 6, 2013 Check connection at pump , bulkhead and FIC module . Pins 3 and 4 at injection pump main connection is your speed signal wires you can check resistance across both should b 800-1400 ohms if not problem is in pump pin 3 is your + line and 4 is- Quote Link to comment https://www.bigmacktrucks.com/topic/31437-94-e7-ch613-code-3-3/#findComment-187144 Share on other sites More sharing options...
Okiki Olufokunbi Posted June 7, 2013 Author Share Posted June 7, 2013 thanks folks. we found loose wiring, and it fixed it Quote Link to comment https://www.bigmacktrucks.com/topic/31437-94-e7-ch613-code-3-3/#findComment-187372 Share on other sites More sharing options...
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