Eddie52803 Posted May 12, 2013 Share Posted May 12, 2013 Hello all, please I need your help. My truck is loosing power. It drives fine at atimes and the next moment it seems its being dragged from the back..... Have checked the injector timing it's ok and it has new nozzles. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/ Share on other sites More sharing options...
dds92780 Posted May 12, 2013 Share Posted May 12, 2013 If its loose you should tighten it up. 1 Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183005 Share on other sites More sharing options...
MACKS Posted May 12, 2013 Share Posted May 12, 2013 Home many miles on the fuel filters,check air filter restriction gauge.. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183010 Share on other sites More sharing options...
Eddie52803 Posted May 12, 2013 Author Share Posted May 12, 2013 All that has been checked......electronic malfunction comes up and stays there. But I realize electronic malfunction is a coolant issue. Now am confused what's going on.Still drives perfect for about 5 to 10 mins then the next thing it starts dragging with no power. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183021 Share on other sites More sharing options...
lucerne tractor Posted May 12, 2013 Share Posted May 12, 2013 More about the truck, year,engine size? Whats the coolant problem, leaking, losing it where? Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183028 Share on other sites More sharing options...
Eddie52803 Posted May 12, 2013 Author Share Posted May 12, 2013 Truck is ch613 E7 454 HP. new nozzles and injector elements but still would not run for more than 10mins without losing power....could it be the power cable supplying power to injector pump. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183030 Share on other sites More sharing options...
wastenafarmtrucking Posted May 15, 2013 Share Posted May 15, 2013 when driving it and it does this, try down shifting and ring the rpms up to around 1800 then up shift again. Sounds stupid I know, but my vision used to lose power on a slight upgrade, lighting bolt would come on and she'd fall flat, split out of 13th, bring the r's up and it would go away, up shift and run it till it did it again.the ecm was bad. mack replaced it and the truck was well out of warranty. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183385 Share on other sites More sharing options...
jzack Posted May 18, 2013 Share Posted May 18, 2013 Check your codes. My truck did the exact same thing and it was throwing a code for the Econovance solenoid (sits in front of the fuel pump). Threw in a new solenoid and problem solved. Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-183815 Share on other sites More sharing options...
bbigrig Posted May 19, 2013 Share Posted May 19, 2013 Your E7 454 doesnt have the Mack "Stealth Brake" does it? Just an idea, as the 454 was the only model of E7 engine with this type of brake I believe. It was a combo of the usual rocker mounted mechanical engine brake with an exhaust brake mounted under the cab. (The 454's engine brakes seemed weak with compression brake only so Mack added to the package and it didn't last long.) might be worth a look to see if this 454 has the exhaust brake assembly under the cab still if it was ordered with the "Mack Stealth Brake". I've heard of guys not even knowing the system was on their 454 untill the gate in the exhaust started acting up. Most of the guys I know had the exhaust brake disconnected and deprogramed within 3 years of delivery due to constant issues. May not be your issue but its worth asking about. \Give the big grey Deutsch connector at the injection pump a twist while its running and see if you have any worn pins or loose wires in that connection. That's a pretty common issue and will cut back on your throttle/power during a malfunction. Good luck. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-184087 Share on other sites More sharing options...
rsb502 Posted May 19, 2013 Share Posted May 19, 2013 Definitely check your ecm harness the plug near the pump has issues with loose pins, you can replace them or just bypass the connector with a jumper wire, you can look for signs of a hot wire most have at least one. The stealth brake exhaust solenoid was an issue but that doesn't sound like this one. Definitely check the codes in the ecm and if you have low coolant it WILL derate the engine and shut it down, fix that first if you know there's an issue and you can go from there. 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/31151-ch-613-e7-engine-loosing-power/#findComment-184093 Share on other sites More sharing options...
Eddie52803 Posted May 26, 2013 Author Share Posted May 26, 2013 Thanks so much guys..... Quote Link to comment https://www.bigmacktrucks.com/topic/31151-ch-613-e7-engine-loosing-power/#findComment-185310 Share on other sites More sharing options...
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