Bradford Posted May 6, 2018 Share Posted May 6, 2018 Just started having issues with CH600. A couple of weeks ago It sputtered on me once. Then on tuesday I was hauling a load of dirt and it sputtered and shut off. Thought it was fuel filters, changed them out and it ran fine until I got down the road a couple miles. My tach then stopped working. Now after towing it home it will start and run for 3 or 4 seconds and shut off still no tach. Also brake lights are stuck on. I've cleaned the cab ground and swapped out some relays. I pulled the ecm off and checked the pins and they are not corroded. Running out of ideas of things to check. Thanks for any help. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/ Share on other sites More sharing options...
fjh Posted May 6, 2018 Share Posted May 6, 2018 /be sure to check it the accesory relay is not dropping out when it quits check to see if the heater fan / and wipers still operate Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398381 Share on other sites More sharing options...
Bradford Posted May 7, 2018 Author Share Posted May 7, 2018 Blower motor and wipers still operate after it shuts off. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398451 Share on other sites More sharing options...
1965 Posted May 7, 2018 Share Posted May 7, 2018 Sounds like low coolant sensor Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398452 Share on other sites More sharing options...
Bradford Posted May 16, 2018 Author Share Posted May 16, 2018 Jumped low coolant wire and still same issues. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398923 Share on other sites More sharing options...
steeler Posted May 17, 2018 Share Posted May 17, 2018 Malfunction light on? Does it fire right back up? Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398945 Share on other sites More sharing options...
Bradford Posted May 17, 2018 Author Share Posted May 17, 2018 No malfunction light and it will start right back up. For some reason the low air light and alarm stay lit up and buzzing after key power is off Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398951 Share on other sites More sharing options...
fullfuel01 Posted May 17, 2018 Share Posted May 17, 2018 there is a big relay in the fuse panel. once bad or when missing this is what it does. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-398979 Share on other sites More sharing options...
Bradford Posted May 18, 2018 Author Share Posted May 18, 2018 The fuse panel in the glove box or on the firewall in the engine compartment? My diagram for the relays and fuses is missing on the glovebox compartment. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-399001 Share on other sites More sharing options...
YASER Posted June 6, 2018 Share Posted June 6, 2018 You have already fixed it, but try to disconnect the oil pressure sensor that is above the oil filter, it may be defective, make a bad reading and turn off. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-400102 Share on other sites More sharing options...
Jamkar Posted June 7, 2018 Share Posted June 7, 2018 I had same issue with an etech, brought up no codes. A new oil pressure sender fixed the problem. Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-400172 Share on other sites More sharing options...
skh Posted December 23, 2020 Share Posted December 23, 2020 what ended up being the issue here. Have a 98 r model with an e7 doing the exact same thing Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-465973 Share on other sites More sharing options...
Veronique Posted October 5, 2022 Share Posted October 5, 2022 Hi i have the same problem. Please help Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511145 Share on other sites More sharing options...
Joey Mack Posted October 6, 2022 Share Posted October 6, 2022 Hey there... you are responding to a 3 year old post.. Please post the make, year, eng series, tranny, and the issue you are having Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511146 Share on other sites More sharing options...
Veronique Posted October 6, 2022 Share Posted October 6, 2022 (edited) Hi It's a Mack E7 Etech 1998. I am having issue with my truck it starts and run for 3 seconds then it shuts off. When the truck starts the gas pedal doesn't work. The RPM doesn't work and when you turn off the key (switch) the dashboards light doesn't turn off. Thanks for any help Edited October 6, 2022 by Veronique Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511159 Share on other sites More sharing options...
Joey Mack Posted October 6, 2022 Share Posted October 6, 2022 (edited) Check the acc. Relay behind the dash,. It looks like a starter relay. You may have a relay next to the fuse panel on the right side, it looks like a cube, if so, swap one of the others with it to see if the issue is still there, also clean the grounds in the dash, there is one next to the fuse panel, and behind the cluster, to the left.. there are other grounds outside too. Let us know how this goes.. Edited October 6, 2022 by Joey Mack more content needed Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511164 Share on other sites More sharing options...
fjh Posted October 6, 2022 Share Posted October 6, 2022 15 hours ago, Joey Mack said: Check the acc. Relay behind the dash,. It looks like a starter relay. You may have that relay next to the fuse panel on the right side, if so, swap one of the others with it to see if the issue is still there, also clean the grounds in the dash, there is one next to the fuse panel, and behind the cluster, to the left.. there are other grounds outside too. Let us know how this goes.. also make sure your engine brake is turned off to be sure unplug the relays! The three second run almost sounds engine brake killing the engine when oil pressure comes up! An o-p shut down would shut down after a minute! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511193 Share on other sites More sharing options...
Joey Mack Posted October 6, 2022 Share Posted October 6, 2022 I just edited my first post, I typed on my phone and saw that some of what I typed didnt post.. "F" has great approaches to diagnose these issues... Pay attention... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511198 Share on other sites More sharing options...
Vmac3 Posted October 7, 2022 Share Posted October 7, 2022 Hi Guys, I believe the post was for an E-TECH not an E7 (Vmac1 or 2). No throttle response may be because of datalink faults. What model truck is it? Different models have different issues. Can you check for codes? V 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511236 Share on other sites More sharing options...
Joey Mack Posted October 7, 2022 Share Posted October 7, 2022 I believe E-Tech is correct. I'm hoping it's a loose ground or something simple like that.. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511238 Share on other sites More sharing options...
Joey Mack Posted October 7, 2022 Share Posted October 7, 2022 Just curious,,,. What repairs have been done tothe truck right before this issue occured? Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511246 Share on other sites More sharing options...
fjh Posted October 7, 2022 Share Posted October 7, 2022 3 hours ago, Vmac3 said: Hi Guys, I believe the post was for an E-TECH not an E7 (Vmac1 or 2). No throttle response may be because of datalink faults. What model truck is it? Different models have different issues. Can you check for codes? V Good call V. Pays to read ! if it’s an rd check the vehicle module under the dash kick if the windshield leaks it can corrode the plug and cause the throttle to become inactive also! just something to look for! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53306-98-etech-e7-starts-runs-for-3-seconds-then-shuts-off/#findComment-511249 Share on other sites More sharing options...
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