HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Finished and at home

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Finished and at home

Post  map21 on Sun Oct 13, 2013 7:47 pm

So I finally got my car back home this weekend. There is still body work and my interior to be done but overall I'm impressed. Here are a few pics.

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I took a moment to add in a heater core valve. How that got forgotten during the build is news to me but what ever 30 mins from start to finish and things were good. I'll just have to route a new push pull cable to the location that in needs to be in.

The only issue I am having is a high pitched whistle. It doesn't resonate from any specific place and is not the belts. It only happens when the car isn't hot. I'll jack it up and listen for it again in the morning but its certainly irritating as heck.
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map21

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Re: Finished and at home

Post  RobotMachines on Mon Oct 14, 2013 12:45 pm

Awesome!  Enjoy Very Happy
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Re: Finished and at home

Post  bluehellfire666 on Mon Oct 14, 2013 3:25 pm

high pitched whistle may be from the oil filler cap...I've heard of ls engines whistling from there due to crankcase pressures etc...

nice looking vehicle! Smile
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Re: Finished and at home

Post  map21 on Mon Oct 14, 2013 3:58 pm

Thanks for the comments guys, I will check the oil filler cap. I am wondering if the bearing at the flywheel could be making the noise. I am certainly hoping not but the whine is constant and doesn't fluctuate with rpm like something rubbing would.
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Re: Finished and at home

Post  Rich L. on Tue Oct 15, 2013 12:09 pm

If it is crankcase pressure, the issue may be with the PCV system. There's an inlet to the manifold, passenger side right behind the throttle body. This should have a hose to either the valley cover with the LS6 system or to the back of both heads with the LS1 system.

The car looks great!

Rich
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Too much vacuum

Post  map21 on Wed Oct 16, 2013 10:11 am

So the newest development is my whistle noise is 100% engine pressure related. That thing has a serious strong vacuum.
It is hard to pull off the oil cap or oil dipstick while its running and once you get them off it sucks serious air through them, engine rpm rises a little and of course the whistle stops.
My old hondas would have positive pressure at the valve cover, and my Tahoe with an engine that is identical with the exception of stroke seems to be neutral on the valve cover pressure.

on my setup
the PCV valve at the back of the intake is capped.
the passenger side valve cover is vented to the intake manifold
the driver side valve cover is capped
the driver side intake port is capped

any opinions on that.
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Re: Finished and at home

Post  bluehellfire666 on Wed Oct 16, 2013 8:27 pm

CALLED IT!!!

Honestly I have no idea what exactly will fix your problem...but I would start with looking around for a vacuum diagram for the engine (stock)...see if there is supposed to be a check valve somewhere or if a hose is on the wrong port etc.

Also see if you can find some information on how the PCV system on your engine works, that will help with diagnostics!

Good luck!
Ethan
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Re: Finished and at home

Post  948 on Thu Oct 17, 2013 11:45 am

If you open up one or both of your valve cover vent holes and plumb them back into the system your problem will be solved. See link below
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Re: Finished and at home

Post  map21 on Sun Oct 20, 2013 3:31 pm

948 wrote:If you open up one or both of your valve cover vent holes and plumb them back into the system your problem will be solved. See link below
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Thanks 948 and Blue. I plumbed it all back in the correct way and just like that no more whistling or excessive vacuum on the system. So now that I have won that battle I've created another problem.

I've got a speed density tune on the pcm and now under heavy throttle she boggs. If I roll into it slowly she pulls like normal with no bogging. I'm gonna get it looked at but chances are I'll ultimately just go back to a MAF system with a VSS so I never have to worry about tuning changes again.
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map21

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Re: Finished and at home

Post  bluehellfire666 on Sun Oct 20, 2013 3:35 pm

Welcome to my world...fix one thing and find another problem! I'd say MAF and VSS would probably make some nice additions in terms of driveability and power delivery with a proper tune...

I wonder if the crankcase vacuum could affect the tune...? I wouldn't think that it would make any difference Question 

glad you fixed the whistle though!!! Smile

Good luck bud
Ethan
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Re: Finished and at home

Post  docwyte on Mon Oct 21, 2013 9:08 am

MAF and VSS here, never had an issue other than the car being a little cold blooded, but she sits alot. So I give her some slack when I start her for the first time in weeks...

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Re: Finished and at home

Post  Rich L. on Mon Oct 21, 2013 7:03 pm

docwyte wrote:MAF and VSS here
Ditto. Mine was tuned on an engine dino at the rebuild.

Rich
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Re: Finished and at home

Post  map21 on Mon Oct 21, 2013 7:22 pm

Rich L. wrote:
docwyte wrote:MAF and VSS here
Ditto. Mine was tuned on an engine dino at the rebuild.

Rich
I have to agree. For a street driven car only, some things are much better stock.

This weekend I'll take the time to trace out the appropriate wires in the harness and start getting it prepped to be wired in once the PCM is reflashed. Luckily I still have the MAF and pigtail. Just need to order a VSS kit from TPC. Speaking of wiring I did extend and move the OBD2 port into the cab. It was under the hood scratch Well just leave that in the pile of why did they do it that ways.
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Re: Finished and at home

Post  Rich L. on Mon Oct 21, 2013 8:28 pm

When I installed the VSS kit, I struggled to get my CVs to stay tight. The schnorr washers weren't on my car from the factory. This was the best information on the subject I could find.

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Glad you're getting it sorted.
Rich
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Re: Finished and at home

Post  docwyte on Tue Oct 22, 2013 8:50 am

My car is mostly a track car. The MAF and VSS just make the car better, period.

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