carlos iribarne Posted May 13, 2021 Share Posted May 13, 2021 Hello. I have a Mack vision pinnacle 2011. It goes normal and suddenly begins to fail losing power, also begins to vibrate after a while it normalizes for hundreds of kilometers. Sometimes when I stop and start the march again it starts to fail. It does not throw any fault code. We have checked it on the computer and nothing. I think it may be something mechanical. But I have been told that there are two injectors failing others that the problem is the sleeves and oring of injectors. I need ideas. Thanks from Patagonia. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/ Share on other sites More sharing options...
Onyx610 Posted May 14, 2021 Share Posted May 14, 2021 Would you happen to be able to provide anymore information? Does it have hard starts, making oil, or want to regen more often? Also does it do it loaded or unloaded? Is the vibration from misfire or driveline/suspension related? I by no means know anything close to a lot of guys on here but I’m glad to maybe try and help you out until someone that really knows can. Hey we all been somewhere and done something someone hasn’t...😎 Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473855 Share on other sites More sharing options...
carlos iribarne Posted May 14, 2021 Author Share Posted May 14, 2021 When the engine is stopped for more than a day, it sometimes takes a long time to start. Vibration occurs when it begins to fail. It seems like an injection problem, however it later normalizes. That is the doubt since it is rare for it to normalize and function normally Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473856 Share on other sites More sharing options...
Onyx610 Posted May 14, 2021 Share Posted May 14, 2021 Have the cups been replaced before? Also who told you that “two injectors” need to be replaced and why? Does sound like a fuel issue so far. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473857 Share on other sites More sharing options...
Onyx610 Posted May 14, 2021 Share Posted May 14, 2021 Does it only do it until the engine is up to operating temp? Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473858 Share on other sites More sharing options...
carlos iribarne Posted May 14, 2021 Author Share Posted May 14, 2021 When you mean cups. It is to the injector sleeves and orings. The injectors I don't think is the cause. The other mechanic told me very sure that it was the cups and orings. This MP8 engine is the same as the D13 Volvo and Renault. and he has a lot of experience in D13 Volvo Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473888 Share on other sites More sharing options...
Onyx610 Posted May 15, 2021 Share Posted May 15, 2021 Yea the metal “cup” that goes down into the head and then the injector sits in it. Very well could be those. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473889 Share on other sites More sharing options...
Joey Mack Posted May 15, 2021 Share Posted May 15, 2021 has your mechanic done an air in the fuel return test? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473890 Share on other sites More sharing options...
carlos iribarne Posted May 15, 2021 Author Share Posted May 15, 2021 not yet Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473892 Share on other sites More sharing options...
Onyx610 Posted May 15, 2021 Share Posted May 15, 2021 That’s a good way to test for a cup issue. Have him check for air before the head and after the head. Maybe check cooling system as well. Joey Mack is a good one for help on most issues. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473895 Share on other sites More sharing options...
carlos iribarne Posted May 15, 2021 Author Share Posted May 15, 2021 thanks Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473899 Share on other sites More sharing options...
Joey Mack Posted May 15, 2021 Share Posted May 15, 2021 you can make your own test tool, with an old fuel line Banjo fitting and enough clear hose to reach the fuel tank fill cap. Have some new copper washers handy, for when you go back together.. Thanks for the compliment, but I'm getting rusty on MP's and the new ones are beyond my knowledge.. Go Bulldog! Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473902 Share on other sites More sharing options...
Onyx610 Posted May 15, 2021 Share Posted May 15, 2021 Let us know what you find out, it’s always nice to know. @Joey Mack yea the MPs and newer style are a full time job it seems like. You either know them or you don’t. It seems like every year they add more shit to them for the hell of it. Enough is enough, i think I was saying that back in 07-08 haha. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473909 Share on other sites More sharing options...
mrsmackpaul Posted May 15, 2021 Share Posted May 15, 2021 19 hours ago, Joey Mack said: has your mechanic done an air in the fuel return test? This is were I would start, but I have no idea at all on modern motors so I cant answer to any degree apart from what I would look for on older mechanical diesels Good luck and keep us updated on the issue Paul Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473912 Share on other sites More sharing options...
carlos iribarne Posted May 15, 2021 Author Share Posted May 15, 2021 We agreed to remove the injectors and observe how far they have changed color and showing the damage to the Orings. We are going to change all the cups and oring. Then I will tell you Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473919 Share on other sites More sharing options...
Joey Mack Posted May 15, 2021 Share Posted May 15, 2021 well Carlos, if you have the money and the tools to take a stab at the problem, more power to you.... I'm a diagnostic guy, I want to know why and what fixed it... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473923 Share on other sites More sharing options...
carlos iribarne Posted May 15, 2021 Author Share Posted May 15, 2021 Believe me, I don't like spending the money. But in Chile South America there are not many alternatives. However with this mechanic we have learned a lot from the MP8 and D13 engines. For example, the fault that they bring in the gear that goes in the distribution which is loose and we have intervened it before it does more damage. I'll let you know if we fix the problem. Greetings. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473925 Share on other sites More sharing options...
Joey Mack Posted May 15, 2021 Share Posted May 15, 2021 ok Carlos.... I did not know about the lack of resources... Do the best you can. unfortunately, you have a truck that requires computers as much as it requires wrenches and know how....i will respectfully step back and I hope another will step in to guide you.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473929 Share on other sites More sharing options...
Onyx610 Posted May 16, 2021 Share Posted May 16, 2021 Carlos, do you guys have access to Premium Tech Tool? Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473940 Share on other sites More sharing options...
carlos iribarne Posted May 16, 2021 Author Share Posted May 16, 2021 Hello. I did not know the tool. I am checking his website. The downside is that it is only in English. It looks very interesting. For now we are seeing importing the Volvo Vocom II tool for our mechanic. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473947 Share on other sites More sharing options...
Onyx610 Posted May 16, 2021 Share Posted May 16, 2021 Yup the Vocom 2 is the driver and tech tool is the software that is used with it. Highly recommend it. Plus you will have access to customer truck portal. Which gives you all the service information for your trucks and also a ton of online classes and also soo much more. Quote Link to comment https://www.bigmacktrucks.com/topic/66700-lose-power-then-goes-ok/#findComment-473959 Share on other sites More sharing options...
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