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automax20 04-23-2010 09:33 AM

Need 4.7 engine swap tech help
I put a 4.7L from a 05 Durango into my 99 Jeep Grand Cherokee that was a 4.7L also. Now i am having timing issues. I need to know what parts to swap. Please Help!

Scottina06 04-23-2010 10:26 AM

Re: Need 4.7 engine swap tech help
need more info.....entire engine and acessories or just the block. What about you tuning?

automax20 04-23-2010 11:17 AM

Re: Need 4.7 engine swap tech help
Put engine in. Changed plenum from the 99 engine on to the 05.Hooked everything up and there seems to be a timing issue.I'm thinking possibly cam shafts are different or the cam sensor.Trying to get my 99 grand cherokee on the road.Thanks for the help in advance.

Scottina06 04-23-2010 11:28 AM

Re: Need 4.7 engine swap tech help
cams are the same on the 99-06 non HO 4.7's....but Im not familiar with the durango 4.7's cam sensor etc.

Gunswinger 05-07-2010 10:54 AM

Re: Need 4.7 engine swap tech help
I was told that the 99 - 00 had a 16 tooth and the 01-04 had a 32 tooth. I am no expert but was told to watch that when I bought a 4.7 for my 00. That could cause the problem you are talking about. ????? Hope I helped. Like I said it has been a long time for me to work on my own car. Just trying to help ya. Good Luck.

scjeep4.7HO 05-07-2010 11:09 AM

Re: Need 4.7 engine swap tech help
It will not properly run if you have gotten the incorrect tone wheels for your PCM. Your 99 should have the 16 tone wheel for your JTEC PCM where the 05 has the 32 tooth tone wheel needed for the NGC PCM. The fix is to swap out the tone wheels but that is not an easy task once the motor is installed in your jeep already.

The tone wheels are located on the passenger side cam and on crank towards the rear of the block (internal).

You have to pull the crank to swap the crank tone wheel...

I don't know if you can swap wiring harness and PCM's. That would also be a ton of different kind of work.. Of course they have changed a few sensors over the years. One that comes to mind is the IAC sensor.

The NGC PCM controls both the engine and tranny and our JTEC has a seperate tranny PCM.

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