newbie help!

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Sep 24, 2015 | 03:17 PM

nutty1

Thread Starter

2nd Gear

Joined: Sep 2015

Posts: 2

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newbie help!

hi all, new here so be gentle!

i have just rebuilt my 2001 3.4 911 the engine now starts but only runs on 1 bank?!?

i have checked the following

cam timing
spark
injector wiring
and coil wiring

do any of you have any ideas?

many thanks

matt

Sep 24, 2015 | 03:55 PM

alpine003

Banned

Joined: Mar 2010

Posts: 7,697

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From: Chicago

Did you reattach all ground wires?

Sep 24, 2015 | 04:30 PM

Ahsai

Nordschleife Master

Joined: May 2005

Posts: 7,326

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I'll steal this one from Jake...did you rotate the crank 360 degree after you timed one bank and before you timed the other bank?

Sep 26, 2015 | 12:16 PM

nutty1

Thread Starter

2nd Gear

Joined: Sep 2015

Posts: 2

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Quote:

Originally Posted by Ahsai

I'll steal this one from Jake...did you rotate the crank 360 degree after you timed one bank and before you timed the other bank?

think you may have hit the nail on the head mate! thank you!

had the locking kit but no instructions

Sep 26, 2015 | 04:24 PM

Ahsai

Nordschleife Master

Joined: May 2005

Posts: 7,326

Likes: 77

Quote:

Originally Posted by nutty1

think you may have hit the nail on the head mate! thank you!

had the locking kit but no instructions

It's easy to verify. Put the engine in TDC cyl#1, the cam lock tool should only be able to fit in the cams on one of the banks. If it can slide in both banks, you have a problem. Normally you need to turn the crank 360 before the tool can fit the other bank.

Another way is to verify compression of each cylinder when you rotate the crankshaft. The compression sequence (every 120 degree on the crankshaft) should follow the firing order 1-6-2-4-3-5.

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