2.7T won't start after major services

**Lakotiy** · 12-26-2015 07:40 PM

So before started to work on the S4 Manual the car would start and idled perfect. Pulled the motor out and changed both turbos because old one was bad, changed the oe flywheel to lightweight flywheel and stage 2 clutch from awe Tunning with throw out bearing, and changed the timing belt with water pump with new pulleys. Put the motor back in and won't fire up but cranks. Did a compression test and 5 cylinders are at 160-180psi besides one that's at 60psi. I've seen a 1.8 start and run perfect with one cylinder at 30psi so that can't be the problem. Checked the timing and my timing lock tool goes in perfectly when crank at tdc. Check for fuel and there's fuel. Check for spark and there's spark. injectors are getting puls at the wires. Crank position sensor was replaced with a new one, icm was switched around, tried staring it with the maf unplugged and carb cleaner. Sometimes when I crank the motor for about 7 seconds and stops it sounds like it's about to start but doesn't. Any advice would help. I have done enough motor swaps and timing belt job to figure this out on my own but completely stuck now. I scanned the ecu for codes with vag com basic scanner and have one code coming up for cluster issue.

**zillarob** · 12-26-2015 08:16 PM

Take breath next time, shit was hard to read

If what you are saying is correct, it should start.

The only thing I could filter out of that wall of text that can muck with it and not throw a code would be the icm plugs.
Black to black, brown to brown.

**Lakotiy** · 12-26-2015 08:26 PM

Originally Posted by zillarob

Take breath next time, shit was hard to read

If what you are saying is correct, it should start.

The only thing I could filter out of that wall of text that can muck with it and not throw a code would be the icm plugs.
Black to black, brown to brown.

Sorry about that, so frustrating. I got few spare motors and tried swapping things around and no go so it's killing me now. I believe believe icms are plugged in correctly. I'll check ones again

**Lakotiy** · 12-26-2015 10:09 PM

Originally Posted by zillarob

Take breath next time, shit was hard to read

If what you are saying is correct, it should start.

The only thing I could filter out of that wall of text that can muck with it and not throw a code would be the icm plugs.
Black to black, brown to brown.

Icms we're plugged in wrong, plugged it in and no start. Put the old cps and it started and running now. Own you a case of beer. Thanks for your help!

**LINDW4LL** · 12-26-2015 10:13 PM

Now to worry about that 60psi compression result.

**Lakotiy** · 12-26-2015 10:16 PM

Customers car, he doesn't want to deal with it.

**zillarob** · 12-27-2015 12:15 AM

Might have to tune up misfires at idle, but shouldnt be a too difficult if they just want to drive it into the ground.

Have an ar here that somebody mixed up the connectors for #3inj and the n80- 0psi on cyl3 now

Maybe I will muck with it one of these days and see if I can beat it into submission

**Lakotiy** · 12-27-2015 12:24 AM

Originally Posted by zillarob

Might have to tune up misfires at idle, but shouldnt be a too difficult if they just want to drive it into the ground.

Have an ar here that somebody mixed up the connectors for #3inj and the n80- 0psi on cyl3 now

Maybe I will muck with it one of these days and see if I can beat it into submission

Damn, I got 2.7 long block here with 90k miles of you need it