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ongoing problem after head gasket job

 
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  • 2 Post By ptcruisersteve
  • 2 Post By rcktpwrd
  • 2 Post By ptcruisersteve
  • 4 Post By 944tim

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  #1 (permalink)  
Old 07 Jun 2018, 05:37 pm
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Join Date: Aug 2016
Location: ohio
Posts: 26
Default ongoing problem after head gasket job

ok 2006 TE non turbo.

had the dreaded PT Gurgle, did combustion gas test , positive. We pulled the head, replaced head gasket, all the upper end gaskets, the belts and alternator were brand new.
No Start.

cranks, has fuel pressure.
DTC codes
PO107 Manifold pressure

PO127 Throttle position sensor

PO335 Crank shaft sensor

PO 340 Cam position sensor

Crank and Cam sensors are new others not
We have not decided whether it is the wiring harness(connections or bad wires)
or is it one or more of the sensors?


BTW we think we figured out why the head gasket leaked, More than one of the head bolts were not torqued correctly due to oil in the holes- hydro locking- thus uneven torque from the PO

So, tomorrow, we are going to inspect and clean/grease all connections and go from there.
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hobby car:87 Porsche 944, currently in restoration mode.
99 F250 for hauling stuff.
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Old 07 Jun 2018, 06:24 pm
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Default Re: ongoing problem after head gasket job

I would suggest checking to see if your camshaft sensor connector and your coil pack connector got switched.
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Last edited by ptcruisersteve; 07 Jun 2018 at 06:32 pm.
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Old 07 Jun 2018, 06:40 pm
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Cool Re: ongoing problem after head gasket job

I agree with Steve, this has been a documented and somewhat common issue when there has been that kind of work done and so much disassembled.

Why both sensors use the same connector and the harness is that easily mixed up is a bad design!
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Old 07 Jun 2018, 09:10 pm
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Default Re: ongoing problem after head gasket job

Quote:
Originally Posted by 944tim View Post

cranks, has fuel pressure.
DTC codes


Crank and Cam sensors are new.
How new? Were they recently replaced to troubleshoot this problem or recently changed and the car ran fine on the new sensors? If Steve's suggestion on checking for a swapped connection doesn't resolve you problem, and you had swapped these sensors out to resolve your codes, I'd suggest going back with the original sensors. No sense in wondering if the new sensors are good or bad or you have a wiring problem, best to isolate by going back to the last known good configuration and go from there.
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Old 08 Jun 2018, 02:33 am
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Default Re: ongoing problem after head gasket job

The cam position sensor connector is the one containing the SOLID-orange colored wire.
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Old 08 Jun 2018, 08:18 am
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Default Re: ongoing problem after head gasket job

[QUOTE=Grasshopper77;689684]How new?

last month did the belts and water pump because it was time, the alternator because we were in there. at that time did the cam sensor at Steves' suggestion.
At this point we are checking the connection ends again as steve suggested.

we will post what happens
__________________
Retired after 45 years, worked at various things, ran a business for a while.
Married 3 kids, 2 grandkids
Daily Driver 2006 PTC,
hobby car:87 Porsche 944, currently in restoration mode.
99 F250 for hauling stuff.
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Old 08 Jun 2018, 11:19 am
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Join Date: Oct 2013
Location: Arkansas
Posts: 10,547
Default Re: ongoing problem after head gasket job

Quote:
Originally Posted by 944tim View Post
ok 2006 TE non turbo.

had the dreaded PT Gurgle, did combustion gas test , positive. We pulled the head, replaced head gasket, all the upper end gaskets, the belts and alternator were brand new.
No Start.

cranks, has fuel pressure.
DTC codes
PO107 Manifold pressure

PO127 Throttle position sensor

PO335 Crank shaft sensor

PO 340 Cam position sensor


Crank and Cam sensors are new others not
We have not decided whether it is the wiring harness(connections or bad wires)
or is it one or more of the sensors?


BTW we think we figured out why the head gasket leaked, More than one of the head bolts were not torqued correctly due to oil in the holes- hydro locking- thus uneven torque from the PO

So, tomorrow, we are going to inspect and clean/grease all connections and go from there.
First, make sure the plugs on the camshaft sensor and ignition coil have not been reversed. They are the SAME plug.

If no joy, remove the top dust cover from the timing sprockets. Then remove #1 spark plug and get the cylinder all the way up on the compression stroke. Now see of the timing marks on the sprockets align. If the engine was not timed correctly, you would likely get the cam and cranks sensor codes while trying to start it.
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Old 08 Jun 2018, 02:17 pm
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Default Re: ongoing problem after head gasket job

Good to see other members agree with my post of checking to see if the connectors got switched.
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Old 09 Jun 2018, 04:18 pm
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Location: ohio
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Default Re: ongoing problem after head gasket job

I did as ptcruisersteve said and switched the 2 connectors and everything works as it is supposed to. Cleared the codes and now we are going on a test drive.
Thank You Steve, your help is invaluable. !
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hobby car:87 Porsche 944, currently in restoration mode.
99 F250 for hauling stuff.
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