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

Car dies and stumbles when warm

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Old Jul 7, 2011 | 06:41 PM
  #11  
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kev70ss
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Originally Posted by cliffyk
How are you monitoring the ECT? Does it ever rise above 160°? I am wondering if the ECT sensor is bad...
Im looking off the gauges about 1/4 of the way up it starts to run bad. I think it has a 195 degree thermostat so it probably gets to 210. I see a lot of posts about the ccrm messing up could the be the culprit?
Old Jul 7, 2011 | 07:27 PM
  #12  
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It a 210°F T-stat (starts to open at 199°F and fully open at 219°F) if it's stock, also the temperature gauge is non-linear making trying to interpret absolute temperature a very inexact exercise.

The CCRM (Constant Control Relay Module) controls the PCM power, the cooling fan, fuel pump relay, and the A/C clutch. Other than the fuel pump relay there's nothing there that would cause the problem you describe--in any event monitoring the fuel pressure will let you know what's up...
Old Jul 7, 2011 | 10:14 PM
  #13  
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I think I found the problem. The coolant crossover had a crack in it leaking out coolant into spark plug #1 making it miss. Now it looks like I need a coolant cross over. Do any PI intakes work or does it have to be from a certain car? Also can I upgrade to one that has an aluminum crossover?
Thanks
Old May 18, 2024 | 05:15 PM
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I have come to hate when a person starts a thread then his a.d.d. gets so bad they can't take the 2 to 4 minutes to make a follow-up post explaining what they learned was the issue behind their provlem
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