Jlam Posted September 4, 2022 Share Posted September 4, 2022 Oil pressure gets below 15psi & turbo veins open & truck has no boost leaving a stop, any ideas what I can do to help stay above 15psi? Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/ Share on other sites More sharing options...
Joey Mack Posted September 4, 2022 Share Posted September 4, 2022 new oil pump and rod and main bearings.... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508509 Share on other sites More sharing options...
Vmac3 Posted September 5, 2022 Share Posted September 5, 2022 Turbo air supply air filter plugged? Seized vanes on turbo? Rockershaft plugs blown out? Seized rocker shafts? Charge air cooler leaking? Fuel pressure low? Fault codes? Engine oil level low? Oil pressure gauge not reading right? List can go on and on. We need more information. Let's start with year make and model of the truck. What has been done to the truck. What other symptoms are there. Lots of great minds here to help out. V 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508604 Share on other sites More sharing options...
Jlam Posted September 5, 2022 Author Share Posted September 5, 2022 @Vmac3 2007 Mack Chn 613 with a aset 427 in it & it’s got new turbo, new vgt actuator, new boost sensor, new boost pressure valve, new air filter, egr blocked off, oil pressure at idle & to temp is about 12psi & truck has 588k on it Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508613 Share on other sites More sharing options...
Jlam Posted September 5, 2022 Author Share Posted September 5, 2022 Also it seems to have a sputter when I’m doing 70 down highway that’s new Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508615 Share on other sites More sharing options...
Popular Post Vmac3 Posted September 5, 2022 Popular Post Share Posted September 5, 2022 Egr blocked off? Ecm is looking for egr flow. It's probably derating the engine. Any codes? V 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508626 Share on other sites More sharing options...
fjh Posted September 5, 2022 Share Posted September 5, 2022 (edited) Try pulling up the blink codes as stated! You will have a mass flow code . How ever are there anymore! For other things! ? Engine speed? Vehicle speed?cam position? These all could make it stumble! I once blocked an egr valve on a customer truck it ran in inhibited for 1.5 mil kms! Not saying it ain’t a problem but…….it was a 2005! Edited September 5, 2022 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508629 Share on other sites More sharing options...
Jlam Posted September 6, 2022 Author Share Posted September 6, 2022 6 hours ago, Vmac3 said: Egr blocked off? Ecm is looking for egr flow. It's probably derating the engine. Any codes? V No codes, it did this before I blocked the egr. Thought blocking it would help but then found this on my boost issue from a stop. Lmk what you guys think I can do Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508664 Share on other sites More sharing options...
Onyx610 Posted September 6, 2022 Share Posted September 6, 2022 Sounds like you need to get your oil pressure up, unfortunately that will pry require what JoeyMack said… 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508665 Share on other sites More sharing options...
Joey Mack Posted September 6, 2022 Share Posted September 6, 2022 (edited) P.A.I. sells great bearing sets and oil pumps, for about half price.... Ask me how I know?? jojo Edited September 6, 2022 by Joey Mack poor sperring.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508666 Share on other sites More sharing options...
Mackpro Posted September 6, 2022 Share Posted September 6, 2022 11 hours ago, Jlam said: No codes, it did this before I blocked the egr. Thought blocking it would help but then found this on my boost issue from a stop. Lmk what you guys think I can do What’s the model and last 6 of Vin and I can have my guy see what software levels are in it 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508690 Share on other sites More sharing options...
fjh Posted September 6, 2022 Share Posted September 6, 2022 (edited) 40 minutes ago, Mackpro said: What’s the model and last 6 of Vin and I can have my guy see what software levels are in it .Sounds to me Mp is on the right path ! Don't think the EGR block is doing it The egr should be throwing a code for mass flo out of parameter! this shows up a few KM after you block it ! Your first boost drop out complaint is pretty exact and some of the other stuff on the list as well there as well! worth a shot doing a reflash! Something may have got corrupted in the program somewhere! (not the first time!) Also if all else fails check the ECM plugs for coolant wicking! relatively common on the older chassis! just something to look at! Edited September 6, 2022 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508693 Share on other sites More sharing options...
Popular Post Vmac3 Posted September 6, 2022 Popular Post Share Posted September 6, 2022 I would do what MP suggests first and see what happens. You spent a lot of money already. I'm wondering if you may be getting fuel in the engine oil causing your fuel pressure issue??? V 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508702 Share on other sites More sharing options...
Joey Mack Posted September 6, 2022 Share Posted September 6, 2022 Fuel in the oil can surely cause low oil pressure.. I just went through this with 2 E-Techs in July.. . Good luck. Jojo 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508709 Share on other sites More sharing options...
Joey Mack Posted September 6, 2022 Share Posted September 6, 2022 I see you are getting some good advice on diagnostics.. Did you happen to put a gauge in one of the oil gallery ports to see if the oil pressure is truly low?? I have one on a 12 foot long hose, it rides in the cab with me when I test drive... 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508711 Share on other sites More sharing options...
Jlam Posted September 6, 2022 Author Share Posted September 6, 2022 8 hours ago, Mackpro said: What’s the model and last 6 of Vin and I can have my guy see what software levels are in it The last six is “011509” Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508725 Share on other sites More sharing options...
Mackpro Posted September 6, 2022 Share Posted September 6, 2022 Your engine software is a Step 5 and Vehicle software is step 12b so your in good shape there . That’s the newest you can get . Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508727 Share on other sites More sharing options...
Jlam Posted September 6, 2022 Author Share Posted September 6, 2022 4 hours ago, Joey Mack said: Fuel in the oil can surely cause low oil pressure.. I just went through this with 2 E-Techs in July.. . Good luck. Jojo Would I smell the fuel in the oil? Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508729 Share on other sites More sharing options...
Jlam Posted September 6, 2022 Author Share Posted September 6, 2022 4 hours ago, Joey Mack said: I see you are getting some good advice on diagnostics.. Did you happen to put a gauge in one of the oil gallery ports to see if the oil pressure is truly low?? I have one on a 12 foot long hose, it rides in the cab with me when I test drive... I have not done that yet Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508730 Share on other sites More sharing options...
Jlam Posted September 6, 2022 Author Share Posted September 6, 2022 Here is my oil pressure at temp at idle after driving Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508731 Share on other sites More sharing options...
Popular Post Joey Mack Posted September 6, 2022 Popular Post Share Posted September 6, 2022 an oil analisys is the best way, but the quickest way I can tell is by smell, (if its really bad),, sight, (very thin) and not milky, (thats coolant).. and lastly, I do a 'Halo test'... get a clean piece of cardboard, the common kind, not the shinny kind.... take it to the engine, pull the dipstick and let it drip one good drip on the card board, then watch... if a halo forms around the oil droplet in a few seconds, the oil is contaminated.. diesel will seperate itself from the oil quickly... basically it will look like a mini black sunny side up egg.. oil in the middle sitting on top of the cardboard, and the fuel will soak into the cardboard around the oil.. Jojo 4 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508736 Share on other sites More sharing options...
Joey Mack Posted September 6, 2022 Share Posted September 6, 2022 there are plugs on the oil filter pad.. on the right is 2 ports, sometimes only one sensor, so you can use the other one to get a true reading. you can also remove the pressure sensor, install a 'T' fitting then put the sensor into that fitting with the pnuematic gauge, and check it, jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508740 Share on other sites More sharing options...
Onyx610 Posted September 7, 2022 Share Posted September 7, 2022 (edited) Highly recommend the oil analysis, it’s basically like getting blood work done for your engine. Edited September 7, 2022 by Onyx610 Spelling 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508750 Share on other sites More sharing options...
Jlam Posted September 7, 2022 Author Share Posted September 7, 2022 2 hours ago, Joey Mack said: an oil analisys is the best way, but the quickest way I can tell is by smell, (if its really bad),, sight, (very thin) and not milky, (thats coolant).. and lastly, I do a 'Halo test'... get a clean piece of cardboard, the common kind, not the shinny kind.... take it to the engine, pull the dipstick and let it drip one good drip on the card board, then watch... if a halo forms around the oil droplet in a few seconds, the oil is contaminated.. diesel will seperate itself from the oil quickly... basically it will look like a mini black sunny side up egg.. oil in the middle sitting on top of the cardboard, and the fuel will soak into the cardboard around the oil.. Jojo Do you think I should do it hot or cold? Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508752 Share on other sites More sharing options...
Onyx610 Posted September 7, 2022 Share Posted September 7, 2022 Cold is fine 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/#findComment-508753 Share on other sites More sharing options...
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