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ENGINE MISS


wilbur
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2000 CH 460  When I take off after sitting a bit ,like for a stop light I get a little sputter for a second and sometimes a little pop. It only  does it in the lower gears and if I ease into the throttle it doesnt do it at all.  Mack says there is a file called a smoke file that could of gotten a glitch in it. They want to reload the file and see. If that aint it he says replace all the eup pumps.  What do you pros think.?   Another thing NO Codes.

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You talking about the sensor that goes in the intake manifold.?   Just cut a wire and splice in the resistor.?  Does it matter which wire.?  Where would I get a resistor like that?  could you send me a link, Please    Thanks

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On 8/12/2019 at 6:22 PM, fjh said:

Yes fuel supply pressure!What colour smoke comes out when the miss occurs!if it doesn’t have the xt engine file then do the download!

Cant tell I put an under side exhaust on it and cant see it.

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44 minutes ago, wilbur said:

You talking about the sensor that goes in the intake manifold.?   Just cut a wire and splice in the resistor.?  Does it matter which wire.?  Where would I get a resistor like that?  could you send me a link, Please    Thanks

Radio shack. Doesn’t matter which. Leave enough space to take it out if needed. 

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  • 1 month later...

I talked to the guy at Mack that did the download and he said that was probably the cause of the mileage to go down. And he also said the file cant be removed once its installed.  What do you think is he strokin me.? I would think it could be over written but just guessin. Mack technician can you help.? Please.

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My buddy who is still at the dealership said It looks like in the past , the engine ECM data files and software has been updated several times. And the dealer did install the correct file for misfire/ white smoke . To get your old file back the dealership would have to request it through their E-service email system with corporate. Hopefully the dealership and corporate can get it swapped back 

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