RWeston Posted August 3 Share Posted August 3 Hello, I am a new truck owner; I have a 1993 Mack CL713 dump truck with reliance transfer trailer. The truck seems to run really well just sometimes it won't start. Most of the time when I try to start it, it doesn't even crank twice and fires right up. It died on me the other day while idling but did start back up. I had it running for quite a while yesterday but when I went out this morning it would not start. I tried for an hour or so and finally gave up. I had a mechanic shop here doing some work on it and he said the start/stop solenoid was an issue with the E-7. I have a part number, and it calls it the econovance solenoid. The part is a little pricey so I thought I would get some other advice before I replace it. After many hours of u-tube videos I found the econovance solenoid and tapped on it and the truck fired right up. (the mechanic shop I had it at showed me a different part and said that was it, my confidence level with them is not really high) Not sure if it was the tapping or if it was just ready to fire. I saw some old forums that spoke to this problem and got a little advice from that. Thanks in advance. appreciate any help given. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/ Share on other sites More sharing options...
Popular Post fjh Posted August 3 Popular Post Share Posted August 3 NO! Do not replace the econovance sol that is not the issue! try unplugging the main fuel pump plug the big round one do this a half dozen times and see if this changes your situation. the econovance sol only controls the Timing! nothing to do with starting other than the smoke on startup! the issue is (usually ) inside the fuel pump and should be repaired by a fuel shop! How ever the plug is a possibility! There are other places to think about as well (but by your description) it is in the fuel pump! On the early models (93 being the first year )there was a valve on the front of the fuel pump that valve can be disabled it has one wire going to it if it is there! take the wire off and tape it up and gut the valve! these sometimes failed and the valve was a safety precaution that later was deleted! 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556357 Share on other sites More sharing options...
RWeston Posted August 3 Author Share Posted August 3 Thank you for your response. I will try that. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556370 Share on other sites More sharing options...
Joey Mack Posted August 3 Share Posted August 3 Those Duetch plugs wreek havoc when they get loose. Fjh, is on to it.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556376 Share on other sites More sharing options...
RWeston Posted August 8 Author Share Posted August 8 FJH- is this the valve you are talking about? Truck started yesterday and not today. hate to ask stupid questions, I'm not a completely incompetent and can do some repair work. just looking for something that i may be able to do before taking it into a shop. I am not noticing any smoke when it is turning over. I also hit it with a little ether, and it fired up then died and wouldn't start. i did try unplugging and plugging the big round main pluck that goes to the back of the fuel pump. any further thoughts or suggestions?? really appreciate any help. just starting my business and its been one thing after another. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556726 Share on other sites More sharing options...
fjh Posted August 9 Share Posted August 9 Can post a picture of the whole fuel pump please! Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556736 Share on other sites More sharing options...
RWeston Posted August 11 Author Share Posted August 11 This is the pic have with me. Is it good enough? Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556878 Share on other sites More sharing options...
fjh Posted August 11 Share Posted August 11 Ok the extra shut down has been deleted on that ! Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556895 Share on other sites More sharing options...
RWeston Posted August 12 Author Share Posted August 12 Thank you for looking, appreciate your time. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556924 Share on other sites More sharing options...
fjh Posted August 12 Share Posted August 12 13 minutes ago, RWeston said: Thank you for looking, appreciate your time. No problem that's what we do here! So if your going to tap on anything tap on the rear of the pump there the rack actuator is contained in that area and is likely the culprit turn the key on tap lightly on the housing and try to start! if it starts you will be looking at removing the fuel pump at some point! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556925 Share on other sites More sharing options...
MACKS Posted August 12 Share Posted August 12 Could it just be losing the prime,leaking return line maybe.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-556932 Share on other sites More sharing options...
RWeston Posted August 17 Author Share Posted August 17 i will double check the return. ive looked at all the lines and dont see any leaking but thats not to say i missed something. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-557162 Share on other sites More sharing options...
RWeston Posted August 17 Author Share Posted August 17 have parts guys looking into replacing that solenoid (rack actuator?) on the back of the pump. not sure if its something i can do or i may just have to take it in. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-557163 Share on other sites More sharing options...
fjh Posted August 17 Share Posted August 17 2 hours ago, RWeston said: have parts guys looking into replacing that solenoid (rack actuator?) on the back of the pump. not sure if its something i can do or i may just have to take it in. Not sure if it can be done without taking the pump off the truck never done it personally! Usually done by a Robert Bosch pump shop! And I’m sure parts are becoming scarce nowadays!this here was a pretty reliable fuel setup so you couldn’t expect them to keep it!😡Mack and John deere used it for quite awhile! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-557168 Share on other sites More sharing options...
The Heinz Posted August 19 Share Posted August 19 I remember seeing that most of the solenoids I researched for a truck in the shop were available in warehouses. The Econovance itself will likely be unobtanium except for junkyards or parts trucks. Quote Link to comment https://www.bigmacktrucks.com/topic/74413-mack-cl713-starting-issues/#findComment-557299 Share on other sites More sharing options...
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