4.6 PI swap....timing issues - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 08-08-2010 Thread Starter
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4.6 PI swap....timing issues

Ok....I should not have swapped the tranny and the heads at the same time.....lesson learned.

The problem I am having is it idles really rough.......acts like there is a vacuum leak when I push on the gas. There is a small knocking sound coming from the bottom end, but is not constant ...... am I off one tooth on the timing?

Damn this is getting irritating, I did this whole project on the ground in my drive way...:/

This morning I tore the intake off (AGAIN) and checked all the vacuum lines and gaskets. Everything appears to be in order and tight....I also sprayed the intake with carb cleaner to check for vacuum leaks.....and nothing.

Any suggestions.....thanks!!!.....also there was no codes via code reader, but it said the timing at idling was 17 degrees...does this seem right?


Last edited by GTStangNWash; 08-08-2010 at 05:00 PM. Reason: bad grammer
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post #2 of 6 (permalink) Old 08-08-2010 Thread Starter
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Well...I went out and looked if over again. Sometimes taking a break helps.

The only thing I can think of is that I did not get the new seal pushed all the way into the timing cover. It is not leaking any oil, but could this cause a serious vacuum leak, without leaking oil?

I am about ready to break down and have it towed to a mechanic

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post #3 of 6 (permalink) Old 08-08-2010
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No, that seal has nothing to do with vacuum whatsoever. Most likely you got one of the timing chains off a tooth, its a very common mistake. I think it's a bit more common on the right side, but you'll need to check both. Start by doing a compression test, if one bank is off from the other my bet is the chain is mistimed. Test that and report what you find, we'll get it figured out.

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post #4 of 6 (permalink) Old 08-08-2010 Thread Starter
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Thanks man.....I was beginning to wonder wtf I myself into...lol

When you say right side....do you mean drivers side facing the front of the engine? That was the one side that was a bit trickier to set. I do not have any timing tools...I just used photos as the example.

Ok I will get back to ya with some photos.....Thanks again
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post #5 of 6 (permalink) Old 08-08-2010
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Do a search in here, not long ago someone posted a step by step. The timing needs to be set PERFECT. I think fox lake has it posted on their site. Like any timing belt or chain it needs to be done the right way.

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post #6 of 6 (permalink) Old 08-08-2010 Thread Starter
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I have a couple of print offs that show you how to do it. The funny thing was it shows the chains to have two copper links and they links show you where the timing chain sits on both gears. Neither chain I have has any copper link or anything indicating such.

I just used the head in the background and counted links to and from.

Guess thats a redneck way of doing it eh?
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