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Virginia Rocks!
Join Date: Oct 2003
Location: Just outside the beltway
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Idle speed controller and vacuum routing
I am having a hard time with the vaccum routing of the big hoses. I took a bunch of stuff off weeks ago and did a lousy job of documenting where the vacuum hoses go.
For instance, where does the short hose from the idle speed control go? Clarks says the intake pipe. The hose is very short and won't reall reach. What attaches to under the intake manifold? Is that the hose that goes to the brake booster? How about the one that comes off the oil filler vent? I should have taken more photos.... 
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
Last edited by VaSteve; 05-02-2006 at 07:43 PM.. |
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05-02-2006, 07:40 PM
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Virginia Rocks!
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Bump....
{crickets}
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 04:25 AM
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Diagrams for both the early and late engines have been posted here many times. Search. Also look for the fuel vent routings. Check your passenger side front fender well (above the windshield washer tank) for a diagram.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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05-03-2006, 05:58 AM
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Virginia Rocks!
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Location: Just outside the beltway
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Yeah, I found the diagrams. I am having a hard time with the ISV. It has a kinky hose that comes off it that doesn't appear to attach to anything on the manifold. Under the manifold there is a place to attach a hose, but it didnt' appear that the kinked hose would reach. Are the early (84) manifolds different from the later (86) - aside from the screw for the cruise control cable. The tubing I'm trying to attach is from my 86 onto an 84 manifold.
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 06:20 AM
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I'll take pictures of mine tonight and post here for you to view. So I'll read your first post and try to get the appropriate pictures. If you can think of anything in particular you may need, just let me know and I'll grab that shot.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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05-03-2006, 06:38 AM
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Virginia Rocks!
Join Date: Oct 2003
Location: Just outside the beltway
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Tom, that would be great. I may have just misoriented the hose when removing it, but if the manifold is inded different, I'll just reinstall my 86 manifold on this 84 engine. Would rather move one hose than 4 gaskets, 8 bolts, etc.
 It appears that the ISV should hook up to the manifold "D", but like I said, I might have it out of whack. Plus I was tired....
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 06:46 AM
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Okay, I'll post them after work.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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05-03-2006, 06:52 AM
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You were advised to use the manifolds and ISV from the 83. As you have found the intake and ISV from the 86 is different. You will have to use the original manifolds and ISV just as you have to use the original fuel rail due to where the fuel lines run through the chassis and connect to the fuel rail.
There is no other sollution.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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05-03-2006, 07:02 AM
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Virginia Rocks!
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Quote:
Quote:
"Original" meaning the 86 stuff....right? No problem, I have all the stuff I took off the motor that came with the car. I'll just put it on the 84 motor.....I have no fuel rail from the 84 motor.
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 07:26 AM
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Virginia Rocks!
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Ug. Looked at it closer tonight. Got the 86 manifold out of its storage spot. It *is* different. Wish I looked closer before posting.
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 06:33 PM
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You're right. It was using the cam from the later engine.
But since the subject has been brought up; use the ISV, intake, AFS, fuel rail, from the 86 on the 84 engine. The 85.5 year break changed a few things on the engines besides the cam. Actually the 84 engines have the mounting brackets for the power steering where the 83's do not. You may want to change the drivers side engine-alternator-A/C mounding bracket too. Along with the poly rib pulley on the crank. The alternator on the later engines has a six rib pulley while the early engines have a five rib pulley on the crank. Also a 110 amp unit while the early is a 90 amp unit. If you have the cast iron headers use them instead of the welded headers. The welded tend to break when the engine mounts are shot.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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05-03-2006, 07:22 PM
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Quote:
or are you suggesting they're in different places?
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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05-03-2006, 07:29 PM
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Virginia Rocks!
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Location: Just outside the beltway
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Oh right. Yeah you did mention the cam. I'm having a ***** of a time with this. tonight. Destroyed my pin spanner trying to take the balance shaft gears off.
 This particular 84 didn't have the p/s pump bracket so I need to move that over. Most of the 84 parts were in a box with no bolts, so it's just as easy to take stuff off the 86 when getting the right bolts. I have both sets of headers. Which are the cast iron? 86?
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 07:34 PM
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Steve, what pictures do you want me to take and post?
SoCal, I don't know how you remember this stuff. I can't even remember what is on my car much less all the different years or even how you find out in the first place. Glad you do cuz we appreciate the help.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually Last edited by Razorback1980; 05-03-2006 at 07:37 PM.. |
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05-03-2006, 07:34 PM
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Virginia Rocks!
Join Date: Oct 2003
Location: Just outside the beltway
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Quote:
 I should have just looked closer at both parts before having you all help me sort it out.
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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05-03-2006, 07:39 PM
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Quote:
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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05-03-2006, 07:57 PM
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Steve, the cast iron headers will be the heavy ones. I think they were used on the early models so they will probably be the ones from the 84. If you are trying to minimize weight for the track, then stay with the steel headers...just watch for cracks on the one for cylinders 1 and 4. If they are cracked, they can be welded but you have to maintain the hole pattern so they bolt back up by using a template.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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05-04-2006, 10:16 AM
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1983 Porsche 944 2.5 liter
