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Porch Pup
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About steeler

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  1. Mine does not have the separate pump for after treatment, but I found the problem. The 7th injector was plugged up. Mack needs to fix some issues with the guided diagnostics in tech tool, it never mentioned anything about that as a possibility for the code I had. Oh well all good now. Thanks.
  2. Ok hooked shop air to the shutoff valve, that didn't change anything. So if my test vehicle has after treatment fuel pressure of 90, with engine fuel pressure at 60, what "ups" that pressure? I thought after treatment fuel pressure would be equal to engine fuel pressure?
  3. I was wrong on that test, all it was was checking the fuel pressure to the shutoff valve, which is the same as the engine pressure. That was the last test, so it just told me "no fault found". I hooked up another truck of the same year just to compare pressures. That one had an after treatment fuel pressure of 90 psi when the shutoff valve opens, then dropped to zero with the valve closed. Mine stays at about 45 with the valve closed. I'm going to run regulated shop air to the shutoff valve at 32 psi just to see if anything changes.
  4. steeler

    Mp8 boost question

    Do you still have active dpf codes? Could be derated causing your low power?
  5. steeler

    Mp8 boost question

    Not sure of the exact spec, but should be higher. What hp mp8 is it? Can you hear any squealing noises or anything abnormal?
  6. Hey guys I've got a 2015 lei that is throwing a p20de00 after treatment fuel pressure sensor circuit range/performance fault. I've run through the diagnostics with tech tool with exception of the final test because I don't have the special tool to do it, but everything checks good. The afp runs about the same as engine pressure when the shutoff valve activates, then runs about 45 lbs deactivated. Engine fuel pressure is steady at about 58-60. Any ideas? Forgot to add that I replaced the doser module.
  7. steeler

    Clutch fan issues

    Yup your fan drive is bad then. Check into the Horton 2 speed drives for a replacement unless yours already has it. It will extend the life of your next one
  8. steeler

    Testing for leaking injector cups

    Ok cool thanks fjh.
  9. steeler

    Testing for leaking injector cups

    What size clear hose is it?
  10. How do you guys hook up your clear line to the head while checking cups? Do you buy the banjo fittings and just keep a rig for testing?
  11. steeler

    Clutch fan issues

    Depends what type of fan drive you have. I would say you probably have a Horton that locks the fan when there is no air to it. If I have one that isn't kicking in properly for me the easiest way to test the fan itself is to remove the air line that goes to the fan drive. That will lock it in and you shouldn't be able to spin the fan. If it's a fan drive that locks on with air pressure to it, then I take the air line off and shoot air to the fan manually and see if it locks. I would suspect the fan drive is probably the culprit.
  12. Can anyone tell me where this module is located on a 2016 gu713? Sorry guys Never mind I found it hiding under the radio.
  13. steeler

    MP8 Broken Crankshaft

    I'll tell you why they won't do anything other than a reman. For one, they don't like the idea of someone "bringing in their own steak" to have them cook it for you. They get no profit in parts that way, just labor. 2nd, and I'm speaking from experience here is that there is almost always (for my shop anyway) issues with this or that being different/not working with your application. It can become a huge pain in the rear, especially after they give you a quote and end up 20 hrs over what they told you it would cost. Our shop went through it not long ago with an mp7. Tried to install engine only to find out there are a zillion different flywheel housings for the mp. And the one on the original engine was no good. We won't do it anymore, only Mack remans. Every time we install a customer supplied used engine we lose our butts.
  14. steeler

    Mack impact info?

    Hmm. Strange. I was looking up info on a service bulletin and was one click away from ordering impact. Maybe they changed something Idk. Our shop is a "service partner" for Mack. Our dealer isn't helpful with it. We mentioned getting impact thru them but he keeps saying we don't really need it. Wrong. We need it badly. You would think us spending 30k a month in parts with them that they would be a little more helpful.
  15. steeler

    Mack impact info?

    A few months ago I was on Macks website and saw a part number for Impact. I can't seem to find out now. My shop would like to get it for service and parts info. Anybody know the part number?

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