Farmermechanic Posted May 2 Share Posted May 2 I have a 2005 Mack ch600 truck with a e7 that has the air operated vgt turbo. Truck came in with egr codes and turbo speed code. Flash code 6-2 egr got deleted but still can’t get rid of turbo code. Replace speed sensor and checked wiring and replaced ecm still not working. Any ideas would help a bunch Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/ Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 Did you look inside the speed sensor hole while turning the propellar to look for damage, or soot? I havent been in one of these is many years. I have the V-MAC III book, so later on I can look at the flow chart for a 6-2 code. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595354 Share on other sites More sharing options...
880joe Posted May 2 Share Posted May 2 Does the little spin on air filter on the left side of the engine have anything to do with the turbo? If so has it been changed? 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595357 Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 That filter is for the VGT actuator. I have seen them restrict or stop air flow many times. Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595358 Share on other sites More sharing options...
fjh Posted May 2 Share Posted May 2 So investigate this! On startup turn the key on observe the pistion on the VGT ! Is the vgt doing its self check? Is it going full stroke ? If it does not stroke out both directions it may be that the vanes are sticking and not allowing the turbo to regulate properly! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595359 Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 Here is what is in the V-MAC III Book Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595366 Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 (edited) My pictures posted out of order. look at the test numbers to follow the steps correctly.. Edited May 5 by Joey Mack Pour sperring Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595367 Share on other sites More sharing options...
Farmermechanic Posted May 5 Author Share Posted May 5 Pulled speed sensor out and a lot of oil on it is that normal? also when I took air intake side of turbo off a lot stick black oil/ soot Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595498 Share on other sites More sharing options...
Joey Mack Posted May 5 Share Posted May 5 Should not be any oil. Does the propellar move side to side? Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595499 Share on other sites More sharing options...
Joey Mack Posted May 5 Share Posted May 5 You can remove the volute on the discharge side to inspect the propeller. Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595500 Share on other sites More sharing options...
Farmermechanic Posted May 5 Author Share Posted May 5 No side to side movement seems good. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595505 Share on other sites More sharing options...
Farmermechanic Posted May 7 Author Share Posted May 7 Think turbo is bad if there is oil on sensor? Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595589 Share on other sites More sharing options...
Joey Mack Posted May 7 Share Posted May 7 I would think so, but.... I would need to look at it, to be sure that the sensor is inserted in a dry area. I dont remember an oring on it, with that said it should be a dry area.. what say you? One thing I know for sure is that if the turbo is passing oil into the compressor volute, you are buying time before the engine runs away... Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595590 Share on other sites More sharing options...
Farmermechanic Posted Tuesday at 10:07 PM Author Share Posted Tuesday at 10:07 PM Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595907 Share on other sites More sharing options...
Joey Mack Posted Tuesday at 10:16 PM Share Posted Tuesday at 10:16 PM so the EGR and the sniffers are gone as well? Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595909 Share on other sites More sharing options...
Farmermechanic Posted Wednesday at 03:47 AM Author Share Posted Wednesday at 03:47 AM Yes Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-595922 Share on other sites More sharing options...
Farmermechanic Posted yesterday at 03:17 AM Author Share Posted yesterday at 03:17 AM Sent turbo to shop turbo shop to get checked out. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-596006 Share on other sites More sharing options...
Mackpro Posted 5 hours ago Share Posted 5 hours ago Oil sludge is common on the intake side of the turbo. This is caused by not changing the air filter soon enough. The air compressor gets its fresh air from the pipe between the air filter housing and the turbocharger, when the air filter is dirty the suction from the turbo impeller will pull oil past the air compressor rings and it will settle and turn to sludge in the intake side of turbocharger. There are some bulletins on fixing the problem with a check valve and special hose on the air compressor intake piping. The fault code for the turbo wheel speed was an open circuit code so the engine ECM is not seeing a signal from the speed sensor. Usually a bad sensor or wiring between sensor and ECM. Test 4 in what Joey Mack posted would tell if it’s the sensor. Only weird this I ever saw was the turbo impeller shaft broke between the bearing and you could turn the intake impeller one way and the exhaust the other way. Quote Link to comment https://www.bigmacktrucks.com/topic/76615-2005-mack-e7-turbo-speed-code/#findComment-596063 Share on other sites More sharing options...
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