Hello we have a 98 mack ch 613 truck with a e7 460 engine. The few seconds could be the time it takes to build oil pressure before the shutdown.
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Mack mp7 wont start. I have read where the fuseboxes go bad but not sure which oneone on top of dash one by clutch pedal nor what symptons are to have to replace them. We changed the ecu with one that works and we checked the vecu also. If wont communicate with mid 128 on the. Check for dirty connections on the copper link from the solenoid output stud to the starter fields. No communication to engine ecm. Mack e tec hard start.
Did read the fault codes and it did have 2 codes relating to the ecu controller and one for the data link. Dd diesel llc 15624 views. All fuses are good. Truck starts oil pressure builds defective veb allows oil to pass which activates engine brake shutting it down. Jul 22 2012 messages. 1998 mack e7 e tech diesel engine test run video engine for sale 8j2509 duration.
If the voltmeter doesnt show any voltage it means that the relay is not working. I have a 2002 mack rd688s with an e7 engine in it. 2008 gu8 mack with mp7 engine it will start right up after it sits out in the cold for two day. Take it out and drive it up to temp park it and shut it read more. Mayhem1 contributing member 5 likes posts. This truck was a hard start after sitting over 1 hour.
We bought at a auction as is with the engine not running was told had a possible bad engine electronic ecu. Checked for voltage and grounds at the ecu according to the. 2008 gu8 mack with mp7 engine it will start right up after it sits out in the cold for two day. Discussion in trucks started by kbeen jul 23 2012. Mack engine no start. Take it out and drive it up to temp park it and shut it read more.
2007 mack mp7 cranks no start. 2007 mack mp7 cranks no start post. Both power wires are good to ecm all terminals and battery cables are clean and tight. Leaking fuel through injector. If the voltmeter reads about 12volts with the start button pressed the starter is faulty. When you turn the key on it powers up and everything seems fine but when you go to start it it wont start.
This could be a faulty relay or wiring to it from the start button. Ive installed a few engine brakes and had bad veb solenoids straight out of the box.
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