4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Knocking on start-up...opinions?

Thread Tools
 
Search this Thread
 
Old Sep 20, 2013 | 02:46 PM
  #11  
Indy-Vert's Avatar
Indy-Vert
Thread Starter
 
Joined: May 2013
Posts: 37
From: Indiana
Default

Originally Posted by Derf00
What weight (viscosity) oil you using? It could simply be the oil is thicker than what you used before so it takes a couple of seconds to get going or the old oil was so worn it was water at startup.

Don't rely on stock gauges to troubleshoot your engine. They are smart-idiot lights.
10w 30 every 3k miles for the last 60k miles.
Old Sep 20, 2013 | 02:54 PM
  #12  
Indy-Vert's Avatar
Indy-Vert
Thread Starter
 
Joined: May 2013
Posts: 37
From: Indiana
Default

Originally Posted by needmorespeed
I have had some issues with a rough idle on startup. The revs build and drop. This never happends with enough regularity to cause me any concern and is only a few hundred rpm difference. The motor runs fine at all other times, except the lifter tick but that is another story. Also, you shouldn't be revving your motor at startup. I don't know what time frame you are talking about but if you jump in, fire it up and rev it up to 5 grand, that isn't good for your motor. You gotta let everything get up to temp before you start revving it.

As an aside, 3K oil changes are probably wasting your money, owners manual calls for changes at 5k.
The revving never gets up above 2000 or so rpm until the motor is properly warmed up . Even on the coldest days I never encountered any rough revving or idling with this motor until now.

As for the oil change, I'm an old-schooler trained by even crustier old-schoolers to change my oil every 3k...it's engrained into my soul, unfortunately.
Old Sep 20, 2013 | 03:00 PM
  #13  
Derf00's Avatar
Derf00
Gentleman's Relish
 
Joined: Feb 2005
Posts: 13,189
From: AZ
Default

Originally Posted by Indy-Vert
10w 30 every 3k miles for the last 60k miles.
That is fine for that motor so I can't say that's necessarily the reason.... although dropping to a 5W-30 would be worth a shot. Slightly lower viscosity when cold would circulate faster at startup. At temp you still have the same protection.
Old Sep 20, 2013 | 03:09 PM
  #14  
needmorespeed's Avatar
needmorespeed
1st Gear Member
 
Joined: Oct 2012
Posts: 89
From: CO
Default

Originally Posted by Indy-Vert
10w 30 every 3k miles for the last 60k miles.
I agree your oil probably isn't the problem but why don't you use 5-20. My 04 runs 5-20 and i assume all 99-04 GT's would run the same.


I guess 3K is better than waiting to long!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jessicarabbit
GT S197 General Discussion
12
Sep 25, 2015 12:41 PM
2015Ecoboost
New Member Area
3
Sep 17, 2015 01:48 PM
degner122
V6 (1994-2004) Mustangs
2
Sep 16, 2015 07:09 AM
rdog69t
SVT Forums
0
Sep 13, 2015 06:16 PM
Jose Corretjer
New Member Area
2
Sep 8, 2015 06:32 AM




All times are GMT -5. The time now is 05:50 PM.