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08limited 02-20-2011 06:39 PM

08 hemi
 
anyone else's hemi sound terrible when it swiches into fuel saver mode it sounds like a exhaust leak dealer said its normal
also after starting and idling for a couple of minuets i hear what sounds like a lifter tapping,is this normal














dcjeepgc 02-20-2011 07:00 PM

Re: 08 hemi
 
I get that lifter tapping noise after my 5.7 hemi has been idling for a few minutes as well. I think this is common and read on this form that others with the 5.7 hemi have this "hemi tap" as well. I think its something that you just have to get use to.

jeepgcoman 02-21-2011 12:17 AM

Re: 08 hemi
 
What kind and weight oil are you running in it? Synthetic or dino? Is your exhaust stock?

08Hemi 02-21-2011 12:29 AM

Re: 08 hemi
 
it def makes a slight exhaust note change, but not like it is leaking...I have a borla cat back with reso delete fyi...from what I have read 5w20 is what you need to use with the 5.7 mds, otherwise the engage/disengage is much more noticeable. kind of a separate issue, but my jeep is idling much better after I cleaned my throttle body. I was amazed how dirty it was...super simple to take a look at it and you may be surprised like I was. jeep runs smoother and idles is a lot less sporadic/choppy!

08limited 02-21-2011 01:51 PM

Re: 08 hemi
 
thanks everyone,the exhaust is stock for now,the dealer said its the m.d.s switching from 4-8cyl in fuel saver mode,stupid feature lol i paid for a 8cyl not a 4,and i see no fuel savings,i just bought it so i havent changed the oil yet,and it seems pretty difficult to get to the fuel filter,should have got the 4.7 its a faster and lighter motor

rammunitiondb9 02-21-2011 02:22 PM

Re: 08 hemi
 
yeah i bought mine this past summer and the first thing i did was buy a predator and disable 4 cyl mode. i paid for 8 i want 8 haha

4.whoa 02-21-2011 03:02 PM

Re: 08 hemi
 
Quote:

Originally Posted by 08limited (Post 360904)
,and it seems pretty difficult to get to the fuel filter,

You can't change the fuel filter ,it's part of the fuel pump assm.in the tank. that "lifter sound" is the infamous "HEMI TICK" drove me nuts for the 1st month or two. You can check with the dealer and see if there are any computer updates for it, sometimes that helps with the shuddering. Definately nothing thicker than 5w20 with a 5.7 :thumbsup:

MasterWK 02-21-2011 11:40 PM

Re: 08 hemi
 
From what I know, if you were to shift your car down into fifth gear, it disables the 4cyl mode. Correct me if I am wrong, but I am almost positive.

08Hemi 02-22-2011 12:03 AM

Re: 08 hemi
 
^ correct...or press tow/haul, puts it in 5th too

buy a predator/trinity and disable that $hit :)

08limited 02-22-2011 09:28 AM

Re: 08 hemi
 
thanks for the info,i meant oil filter not fuel filter by the way my mistake,and what do u mean shift it into 5th gear ,just leave it there all the time?

MasterWK 02-22-2011 09:12 PM

Re: 08 hemi
 
When in drive just tap the shifter to the left and you'll see [5] in your evic! And yes, just leave it there, or shift all of the time depending on conditions, but whenever you're in drive and you're not in the gas, you'll see Econ (limited cylinder mode) in your evic when in the compass menu. Hope that helps.

4.whoa 02-23-2011 08:59 AM

Re: 08 hemi
 
Get one of those oil filter wrenches that holds the bottom of the filter like a socket. They fit on the little flat spots, and you use a ratchet to turn it. I use a swivel head ratchet and its no sweat :thumbsup:


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