ch613 Posted April 28, 2010 Share Posted April 28, 2010 I have a 1997 ch613 with an E7 454 that has developed a hiccup. It acts as if it stops running for just a fraction of a second and then continues to run, it does this with cruise on or off while cruising at road speed. Sometimes this creates a pretty good jerk and other times this happens much smoother, this can happen several times a day or just once or twice. Any ideas?? Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/ Share on other sites More sharing options...
Gambi80 Posted May 1, 2010 Share Posted May 1, 2010 I have a 1997 ch613 with an E7 454 that has developed a hiccup. It acts as if it stops running for just a fraction of a second and then continues to run, it does this with cruise on or off while cruising at road speed. Sometimes this creates a pretty good jerk and other times this happens much smoother, this can happen several times a day or just once or twice. Any ideas??Have it hold its breath and hang upside down for 30 seconds...usually works for me...Anyway, maybe try taking that 9-pin plug apart (unscrew approx. 1/4 turn and pull apart) on the back side of the injection pump and blow it out good with an air gun and reconnect. Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54202 Share on other sites More sharing options...
Rob Posted May 1, 2010 Share Posted May 1, 2010 Have it hold its breath and hang upside down for 30 seconds...usually works for me...Anyway, maybe try taking that 9-pin plug apart (unscrew approx. 1/4 turn and pull apart) on the back side of the injection pump and blow it out good with an air gun and reconnect.Someone told of maintenance on the accelerator pedal also.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54208 Share on other sites More sharing options...
fjh Posted May 1, 2010 Share Posted May 1, 2010 Have it hold its breath and hang upside down for 30 seconds...usually works for me...Anyway, maybe try taking that 9-pin plug apart (unscrew approx. 1/4 turn and pull apart) on the back side of the injection pump and blow it out good with an air gun and reconnect.Take this plug apart as directed above and put it together and take it apart 6 or 7 times blow it out and try it this may help.If not take it to a dealer and have them re pin the plug. Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54217 Share on other sites More sharing options...
ch613 Posted May 2, 2010 Author Share Posted May 2, 2010 Thanks for the info, I will try clearing the plug and see what happens, what is this plug called?? It keeps getting progressively worst so I'm thinking it is fuel related, at first I was thinking a sensor or something electrical. Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54252 Share on other sites More sharing options...
fjh Posted May 2, 2010 Share Posted May 2, 2010 Thanks for the info, I will try clearing the plug and see what happens, what is this plug called?? It keeps getting progressively worst so I'm thinking it is fuel related, at first I was thinking a sensor or something electrical.It is simply the main fuel pump plug !When you have this apart look at it head on and see if there are any signs of heat, brown looking areas on any of the plastic pin bosses If you find any that look discolored I would go to the dealer and have it repined! Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54261 Share on other sites More sharing options...
ch613 Posted May 11, 2010 Author Share Posted May 11, 2010 (edited) It is simply the main fuel pump plug !When you have this apart look at it head on and see if there are any signs of heat, brown looking areas on any of the plastic pin bosses If you find any that look discolored I would go to the dealer and have it repined!So far so good, I took the plug apart and blew it out, checked the pins and three are starting to discolor but the bosses looked OK. I'm not sure what fixed my problem sense I replaced the timing sensor at the same time as the wires were bare rite where they meet the sensor. I did wiggle the wires around and the motor never missed a beat so I don't think it was the sensor.Thanks for the everyone. Edited May 11, 2010 by ch613 Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54881 Share on other sites More sharing options...
Gambi80 Posted May 11, 2010 Share Posted May 11, 2010 So far so good, I took the plug apart and blew it out, checked the pins and three are starting to discolor but the bosses looked OK. I'm not sure what fixed my problem sense I replaced the timing sensor at the same time as the wires were bare rite where they meet the sensor. I did wiggle the wires around and the motor never missed a beat so I don't think it was the sensor.Thanks for the everyone.Glad that fixed it. One little bad electrical connection can do a good job of screwin things up can't it? Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-54935 Share on other sites More sharing options...
babyliz3028 Posted May 13, 2010 Share Posted May 13, 2010 im posting for a friend of mine...i know nothing about nothing lol.He is having kinda the same problem, except his truck never recovered from the hiccup. He is looking for the following (i copy and pasted from him): - ecm ins and outs on a v mac 2 for 97 E7-454 or a wire number listany help would be GREATLY appreciated! thanks! Quote Link to comment https://www.bigmacktrucks.com/topic/13639-1997-e7-454/#findComment-55054 Share on other sites More sharing options...
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