07 5.9 idle tap
#1
07 5.9 idle tap
I have an 07 5.9, at hot idle has a random almost fuel knock,when you rev up engine this goes away.Fuel mileage is very good no smoke ,idles smooth.Idle is louder than other new dodges I have listen too.When cold engine is very quiet,only does this when hot,2500 miles and no mods.Dealership put on computer you know the answer,checks ok!.any ideas would help alot,I am switching over from d-maxes.
#2
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Could be carbon build up on one of the injectors. Try running a heavy dose of diesel injector cleaner (Howes, Power Service, Redline, etc) and see if it goes away.
MikeyB
MikeyB
#3
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Join Date: Jul 2007
Location: Richmond VA
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mine does the same thing....the dealer said their was tsb. but it did not fix the knock.
Then they sayed.. valve ajustment..(not covered) 400.oo they BE crazy!!!
I will ajust them one day for FREE!
Then they sayed.. valve ajustment..(not covered) 400.oo they BE crazy!!!
I will ajust them one day for FREE!
#5
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I came over from FORD but my buddy has te same truck (he sold me on it) his is much quieter...altho we found out his has 750 hr on it with 30k miles mine I GOT USED has 1400hr. on it with 30k miles.
#7
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not sure if this will help on the 07, but it did on my 96 cumming when i had it, i was told to change the fuel filter, and it fixed the problem, and months latter the same thing, and change it again and the tapping went away. hope this helps.
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#8
Thanks for all the idea's I put in a quart of ps. and changed the fuel filter ,everything is still the same.Sometimes when truck is hot it does not bust right off when you turn on the key,which is not normal for these trucks.I am going to check with a different dealership in Wichita Falls tomorrow, they supposedly have a good cummins mech.Thanks again.
#10
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I would say this no doubt is a carbon knock. 1400hrs with 30,000 miles means a ton of idling time. Go hook up to the heaviest thing you can find and drag it around. Keep the EGT's up to 1000 for a while. This is the fastest way that I have found to clean mine out. I don't use PS or Howes Meaner Cleaner anymore. No need to. However, the Howes's Meaner cleaner did work.
#11
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Running some bio-diesel with the diesel #2 made mine soooooo much quieter. It got rid of a tapping noise too.
Last edited by 00Dog; 07-23-2007 at 03:54 PM. Reason: addition
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I've got this same tapping sound too... about 800 hrs and 21,000 mi so a lot of idling on mine also, been running Power Service through every tank for the last probably 4-5. I hope its as easy as keeping the EGT's up for awhile.
#15
Thanks everyone for help,I have an app. thurs in altus,ok.They have a good cummins tech,thier my truck only has 65 hours and 2800 miles on tap has been since day one ,I had 2 6.0's bought back before going to d-max,have always likd dodges,now especially mega-cabs,just do not like problems,d-mxes were trouble free as with the other 5 dodges I had before kiddos.
thanks again
thanks again