T ea7470 Posted May 12, 2022 Share Posted May 12, 2022 Hi guys new here hoping someone can help have a 2008 ch688 that keeps throwing a fult waste gate data intermittent. Now it's doing this when you are coasting with no load on the engine and the intake manifold pressure is low. On a long pull it's fine plenty of boost and not over boosting. Have replace both sensors in the air intake brand new turbo and waste gate new waste gate hose. New crank and speed sensors and still no luck. Any clues as where to go next 🤔 mack dealer is stumped to Quote Link to comment Share on other sites More sharing options...
fjh Posted May 12, 2022 Share Posted May 12, 2022 (edited) Hi Sorry Is this A RED ENGINE? AUZZ! ? If so ! I believe there were issues with the plugs at the turbo on These here There is a TSB on it some where Mack pro may be able to hook u up with it! Edited May 12, 2022 by fjh Quote Link to comment Share on other sites More sharing options...
T ea7470 Posted May 12, 2022 Author Share Posted May 12, 2022 Not a red head and was Australian built. Has a manual wastegate not electric Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted May 12, 2022 Share Posted May 12, 2022 looks like an ASET-I.. I will keep reading as you post.. jojo Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted May 13, 2022 Share Posted May 13, 2022 is the wastegate operated by boost pressure from the intake, or is there a separate air supply that operates it? I do not know how Australian trucks are built. Did you do a pressure test on the C.A.C. and intake manifold for leaks.? jojo Quote Link to comment Share on other sites More sharing options...
fjh Posted May 13, 2022 Share Posted May 13, 2022 2 hours ago, Joey Mack said: is the wastegate operated by boost pressure from the intake, or is there a separate air supply that operates it? I do not know how Australian trucks are built. Did you do a pressure test on the C.A.C. and intake manifold for leaks.? jojo Bit different eh Joe !? They only ran this type of turbo 2-3 years here 2001-2004 topped out at 33 psi boost for a 460 HP engine BS Horse power! if they hit 34 psi they would derate! 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted May 13, 2022 Share Posted May 13, 2022 yes sir.. i wish I knew more about them.. I will keep reading.. jojo Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 13, 2022 Share Posted May 13, 2022 There is a service bulletin on the “4-5 code CCRS “ I’ll try to find a link to it. In the US this waste gated turbo set up was only on the 460 HP CCRS engines, right before the ASET series engines came out . It was an on going battle to keep the boost pressure in the right specs to prevent under boost or even worse over boost that de-rated the engine. We downgraded several trucks to 427 Hp to get away from this nightmare. My favorite truck of all time was the 2002 axle forward CH 427 CCRS with a Fuller super 10 1 Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 13, 2022 Share Posted May 13, 2022 Mack service bulletin SB-221-029 was specifically for the 4-5 code troubleshooting. Service bulletin SB-214-017 is more on the design and function of the CCRS 460 turbo. I’m not able to find online links for either . Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted May 13, 2022 Share Posted May 13, 2022 CCRS.??. What did i miss? I would like to know.. 2008 was the year stated, is it because it's Australian, that I thought it was an ASET?... Just curious... jojo Quote Link to comment Share on other sites More sharing options...
fjh Posted May 14, 2022 Share Posted May 14, 2022 (edited) 7 hours ago, Joey Mack said: CCRS.??. What did i miss? I would like to know.. 2008 was the year stated, is it because it's Australian, that I thought it was an ASET?... Just curious... jojo Auz was behind emissions wise by a year or so I beleive CCRS did away with the fuel drain back at the injector The injector had to shoot what it was given! Edited May 14, 2022 by fjh Quote Link to comment Share on other sites More sharing options...
Jason Jewell Posted October 17, 2023 Share Posted October 17, 2023 Gday our truck has the exact same fault and symptoms, did you resolve your issue? cheers Jason Quote Link to comment Share on other sites More sharing options...
T ea7470 Posted October 17, 2023 Author Share Posted October 17, 2023 Yes the two intake sensors on the intake manifold were not reading correctly the back one behind the computer had a broken wire also boost tested it and found the intercooler hose was breaking down and blistering on the inside and boost was seeping out. But. Also another cause of this problem is dickey injectors.. 1 Quote Link to comment Share on other sites More sharing options...
Jason Jewell Posted October 17, 2023 Share Posted October 17, 2023 Great thanks, we’ve replaced both sensors, I’ll check the wiring harness and go from there Quote Link to comment Share on other sites More sharing options...
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