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

Unique sputtering problem

Thread Tools
 
Search this Thread
 
Old Nov 22, 2021 | 05:06 PM
  #1  
Newmuatangowner's Avatar
Newmuatangowner
Thread Starter
 
Joined: Nov 2021
Posts: 14
From: SK
Default Unique sputtering problem

I just changed my thermostat last night and a little coolant leaked on the cop next to it, I thought no big deal dried it off made sure none got inside and I couldn't see any liquid inside, but i noticed now at low rpms it sputters under acceleration under 3k rpm, if I unplug any of the coils it idles MUCH differently so I don't think they're bad? Any ideas are welcome
Old Nov 22, 2021 | 09:31 PM
  #2  
Newmuatangowner's Avatar
Newmuatangowner
Thread Starter
 
Joined: Nov 2021
Posts: 14
From: SK
Default

Found a missing part in the intake right after the maf (I believe it's the maf on this vehicle) what's supposed to be there?
Old Nov 23, 2021 | 05:18 AM
  #3  
Brewster Rooster's Avatar
Brewster Rooster
 
Joined: May 2021
Posts: 14
From: Illinois
Default

Originally Posted by Newmuatangowner
Found a missing part in the intake right after the maf (I believe it's the maf on this vehicle) what's supposed to be there?
can you take a picture on the engine itself and circle what you are trying to indicate..you can also have a bad coil..it may work fine at idle but not perform under a load...if you get coils go to rock auto and order oem. What plugs are you running and when did you put them in?
Old Nov 23, 2021 | 10:22 AM
  #4  
Derf00's Avatar
Derf00
Gentleman's Relish
 
Joined: Feb 2005
Posts: 13,189
From: AZ
Default

Start with basics. unmetered air will cause problems at anything above idle if it's only a small leak. Not sure how the car was running fine before any work was done if that leak has always been there....?

Anyways, you should have a MAF/MAP/some type of sensor immediately after the air filter. If you got nothing there, it will run like crap off idle because the computer has no way of knowing how much air you got coming in. If you do have a sensor connected but have a different hole that has no sensor or is unplugged, try plugging to see how the engine runs. Some intakes have a port to run vacuum off of or EGR stuff.
Old Nov 27, 2021 | 12:59 AM
  #5  
Newmuatangowner's Avatar
Newmuatangowner
Thread Starter
 
Joined: Nov 2021
Posts: 14
From: SK
Default

Didn't get the email that someone replied for some reason, Im beginning to think it is a coil, I plugged the hole and it did nothing, I noticed it's only when it rains or the snow is melting as well. Spark plugs and coils I have no idea about, I know 2 were changed recently, I just bought the car about a week and a half ago
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Mustafa Shabbir
New Member Area
7
Mar 11, 2018 04:45 AM
Rdzmach1
Mach 1 Section
7
Jul 9, 2012 06:32 PM
jrxs_racer
5.0L (1979-1995) Mustang
16
Sep 15, 2007 03:58 PM
StangChik
4.6L (1996-2004 Modular) Mustang
1
Jul 7, 2006 11:55 AM
jfor441
4.6L (1996-2004 Modular) Mustang
5
Apr 9, 2006 10:57 PM




All times are GMT -5. The time now is 01:19 AM.