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

Engine changes after 10-2002?

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Old 05-10-2014, 05:22 PM
  #31  
Hangwire
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Yes you are absolutely correct about the injectors.

Ford realized the 19lb/h injectors were not up to the task and changed in 01/02 to the 21lb/h injectors. The 21lb/h injectors are pink tops. They did not change the fuel curve at all so it does in fact run rich stock.

Good idea on the connecting rods. Can never build those up enough on these motors when throwing power down.

The twisted wedge heads are sick but as you noticed ridiculously priced. Trickflow has a great product but screwed up bad with the pricing on those things. I would much sooner convert to 4V before blowing the cost of a supercharger on 2V cylinder heads. LOL.
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Old 06-22-2014, 09:12 PM
  #32  
VTX1800N1
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Originally Posted by Hangwire
I'm just poking fun at you more than anything lol. Hence the smiley.

Its a nice way to express that mayyyybe you dont know quite as much as you thought in this situation

Honestly I've never even done any internal engine work on these motors - not personally at least. I understand exactly whats going on and thats about it. Regardless I have spent a bit of time both working on a researching these cars - certainly enough to troubleshoot symptoms.

You could very well have valvetrain issues. It just makes a lot of sense to eliminate an extremely common issue that causes symptoms that you are describing before digging into the cylinder heads. Thats no small task for anyone and certainly not worth doing if its not necessary no matter who you are.

Good thing is its an easy step to take to eliminate this as a possible issue. And its never a bad idea to throw a fresh set of COPS/Spark Plugs on a 10+ year old car that you have little service history on.

Keep us posted.
Sorry, but I feel more than a little vindicated after pulling the passenger side valve cover today. It looks like I knew exactly what I was talking about:



Cam retainer boss bolts were finger tight or less- seven on the passenger side and two on the driver side. Passenger rear boss is cracked nearly all the way through:



No damage on the driver side. Cylinder 8 showed ring seal failure, so we will inspect that when I get to it.

I backed these retainer bolts out without the use of a wrench:

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