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Join Date: May 2007
Location: Portsmouth, Ohio
Posts: 112
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New to 928 Questions
I just purchased my first Porsche. I am now the proud owner of a 1984 928 with 93,000 miles. So if there is any newbie info you have sent it to me.......
My question is...there is a sensor just to the right of the A/C vents above the radio. Mine is pulled half out and I am told is bad. The prevous owner gave me a new one with the car.....WHAT IS THIS THING??? Any tune up advice? Thanks Brian Felts |
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05-26-2007, 05:09 PM
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Join Date: Jan 2007
Location: SoCal
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Ideally before you buy a 928 you should have a thorough inspection done, it still should be the first thing now that you own it. I can dig up a link to a guide on how to do it, but what really helps is to have someone with lots of experience specifically with the 928 to spend a couple hours checking it out including putting it on a lift and doing a compression test.
Everything related to a normal tuneup tends to last a very long time on the 928, but after a good inspection it isn't like you won't have plenty of stuff that needs to done. Its really no fun to spend a thousand or two on non essential routine stuff, then find out you have $5k or $10k of serious stuff you should have started with. Post some pictures of your new baby.
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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05-26-2007, 09:16 PM
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Well I know the timing belt is under ten K miles but the previous owner said it had been forever since it had new Cap/rotor/plugs. I also am going to go ahead and do a trans. service.
I am a decent mechanic but I have worked mostly on BMW's and Benz's. I have always wanted a 928 so here was my chance. I will try to snap some pics this evening. I am in the process of painting a 89 Turbo Trans Am this morning then I get to play with my new toy......I am glad to be back German.... Brian www.geocities.com/southernohioauto TTA Pics www.geocities.com/southernohioauto/yourcar
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1984 928 Auto 2001 525I 1996 Suburban 2500 454ci Last edited by Brian Felts; 05-27-2007 at 02:31 AM.. |
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05-27-2007, 02:08 AM
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The AT is a Benz box so you should feel right at home.
Jim Morehouse has the workshop manuals on a CD, jim928@ptd.net not just scans, but converted to text and indexed, plus a second set of CDs with all the tech update manuals. Might as well change the plugs since you will want to check the compression, but the factory wires on my 83 seem fine. Full set of replacement wires is expensive ($200 to $300), but you can find them three ways, everything including looms, wires and plug connectors, or just the wires. Prices VARY so you may want to shop around. Pelican provides this forum free of charge, so I like to give them first shot, and not to plug cheap sources publicly, but give me a PM and I will pass on my short list. WYIT or WYAIT is a phrase to live by on the 928, While your already in there. If it needs a tune up, chances are its dying for new vacuum hoses, fuel lines, filters, boots, fluids, electrical cleaning, and tires. Many 928's have old rubber, and you want none of it. Any time you go in an area on a 928, expect collateral damage. Its the main reason many shops won't touch a 928, customer comes in for X, and WXYZ goes bad during the repair. Getting a baseline before you create new problems is a REALLY good idea. (so ends my preaching I promise)
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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05-27-2007, 06:57 AM
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No preaching that is good info.........all and all the engine looks fairly straight forward. Do I need to pull the runners to get the plugs out?
I have read up on the tranny but it being in the back where is the filler tube? I have read also there is a sight plug to check the level of fluid. I understand the lines etc. I would expect to have to do them as I go. I have a good bit of learing to do on this car. This is the first Porsche in the family. Brian Felts
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1984 928 Auto 2001 525I 1996 Suburban 2500 454ci |
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05-27-2007, 07:08 AM
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You really don't want to pull runners just yet, but when you replace the aging and leaking since you are wiggling the wires and stuff around fuel hoses, might as well pull all the injectors and clean and rebuilt them.
My latest purchase in regard to the intake runners, Kevlar sleeves and gloves, No clue on AT details.
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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05-27-2007, 07:21 AM
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I believe the tranny fluid filler tube is at the back as well....difficult to get to. People have talked about a small(cheap) pump used to fill it.
BTW one of the best things I did to my car was the tranny flush, the car was like a new machine, faster, crisper shifts. |
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05-28-2007, 09:51 AM
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Changing all the fluids and all the filters was the very top of my list, only thing still waiting is the AC. Biggest regret, not draining and cleaning out the fuel tank, but that might still happen, just didn't seem worth it when it was already on about the 3rd tank of recent gas when I bought it. Bottle of Techron went in with the first fillup I made, can of Moly Lubro Limple Sauber went in the second.
Coolant going acid can be serious with the 928, so part of my check out of potential cars is that I carry some test strips and check the coolant.
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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05-28-2007, 11:03 AM
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Yep jimmyt123 is correct, kind of what I meant.
jimmy, what type of pump should you use? something like a small hand pump? |
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05-29-2007, 05:25 AM
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Heavy Metal Relocator
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after you get done with the servicing of fluids and filters and such, you could get started on Wally Plumley's yearly electrical maintenance.
It's pretty basic, just pertains to disconnecting every major wiring connection (battery, fuse panel, starter, alternator, engine jump start terminal, all ground straps, etc..) and cleaning them thoroughly. Doing this will give you more voltage, better performance, etc.... Have fun! ----- 
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Absence of Evidence, is not Evidence of Absence. Bill Maher 8/4/09--- "I'll show you Obama's birth certificate, when you show me Sarah Palin's high school diploma." |
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05-30-2007, 04:51 PM
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Quote:
Now that is good info also.......I will be checking in on that.. Brian |
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05-30-2007, 04:57 PM
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Heavy Metal Relocator
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go to 928 specialists website, see tech tips for Wally's tutorial...
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Absence of Evidence, is not Evidence of Absence. Bill Maher 8/4/09--- "I'll show you Obama's birth certificate, when you show me Sarah Palin's high school diploma." |
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05-30-2007, 05:33 PM
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