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You cant have just one.
 
1982_928's Avatar
 
Join Date: Jun 2011
Location: Texas
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81 928 - the "copper turd"

Worked a trade deal and brought home another - more complete - 928 yesterday! I know many of the North Texas 928 guys know this car as the "Copper turd", so I'll just refer to it as that. The car originally came from Roger, who I hope to do some business with buying parts!

The car is a 5 speed. The fuel tank was dry, so after checking the oil and water level, we put some fuel in it hoping it would run. After cranking on it and it backfiring through the intake any time it was attempted, we gave up. Brought it home thinking that the timing was off, and after talking to John and confirming it likely was, I re-timed it. It now runs momentarily with a splash of fuel poured in it, but nothing beyond that.

The injectors do not appear to be firing, and I will confirm that is the case with a noid light in a day or two. Jumping the relay for the fuel injection yielded no results. I do have fuel at the engine. I will also check grounds, namely the notorious one I've read of that's located on the passenger side valve cover to see if anything improves. I'm also going to have to do some work with the wiring at the 14 pin connector, which might be part of the problem.

Beyond that it should just need basic maintenance mechanical wise to make it a driver. The interior needs a ton of help. Hopefully I can find who might have the title for it. I'd really love to avoid going through the bonded title process.








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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed

Last edited by 1982_928; 12-16-2018 at 05:46 PM..
Old 12-16-2018, 05:38 PM
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Petie3rd
 
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damn thats a stunning color
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^^^ Stan ^^^ 2011 BMW K1300S Magma red
1988 S4 Auto , Elfenbein Perlglanz, Pearl Gray
1988 S4 5 sp, Black / Black leather/ Carmel carpet
Old 12-17-2018, 02:24 PM
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Petie3rd
 
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call 928 intl for the half price used parts sale just ask for half price till dec 24th you can get new interior parts
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^^^ Stan ^^^ 2011 BMW K1300S Magma red
1988 S4 Auto , Elfenbein Perlglanz, Pearl Gray
1988 S4 5 sp, Black / Black leather/ Carmel carpet
Old 12-17-2018, 02:26 PM
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Thanks! At first I thought the color was a bit odd but it's grown on me. I certainly doubt I'll see another one that color!

Thanks for reminding me of their sale!
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed
Old 12-17-2018, 05:54 PM
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A little bit of progress was made this evening. I put the proper relay in the fuel injection slot, but nothing changed. Checked other relays, grounds, etc., but still, nothing. Finally, I was giving up and was going to pull the battery out of it, and I noticed the wire that connects with the positive lead was loose. Tightened that, and it attempted to run. Seemed like it was firing off of the cold start injector.

My 83 did the same thing when I first got it, and after cleaning the injectors, it started and ran fine. Because of this, I decided to pull and clean the injectors. They're currently soaking in some Sea Foam, and I will blow them out tomorrow. I figured it's a good time to change the injector hoses anyways.

Hopefully this will solve my no-start issue!
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed
Old 12-18-2018, 07:05 PM
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Jonah,

Blowing them out will not get them clean. The better way is to make a jig to connect to the electrical connection and provide switched power to that connection. Hook a Mity-vac up to the top of the injector and put a vacuum on it. With the injector in the Seafoam, switch the power off and on continuously until the seafoam begins to draw up and through the injector.
Don't leave the power on: you don't want to burn out the tiny solenoids in the injectors.

I use Berryman B12, but seafoam will work fine I'm sure.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
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Old 12-18-2018, 08:09 PM
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Alright. I had planned on making a jig and rigging it up so that I could see how the injectors sprayed, but I'll use vacuum instead. The particulate in them is probably too large to get through the nozzle anyways. I'll cycle the power on and off to keep from killing the solenoids.

On a side note, this car needs a windshield. I've seen some windshields advertised for fitting 78-95, others listed as 78-89 and 90-95, and another place listed as 78-84, 85-88, and 89-95. I'm curious curious which is actually correct because the earlier windshields I find are more expensive than the later.

Thanks!
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed

Last edited by 1982_928; 12-19-2018 at 04:34 AM..
Old 12-19-2018, 04:31 AM
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Jonah,

Most of the local windshield repair companies have access to new 928 windshields. I just priced one right down the street from my house that was $212 installed. Hard to go wrong with that.
I know that they do good work because they replaced the windshield in my 89 for $185 a few years ago.

BTW, the only difference in any of the windshields from 78-95 was the the antennae wire included in the glass circa 86. Any 928 windshield will fit in any 928.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)

Last edited by stepson; 12-19-2018 at 06:06 AM.. Reason: add info
Old 12-19-2018, 06:02 AM
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Injector Cleaning -

Hey Jonah - Just to eliminate a potential relay problem- have you pulled the Computer power relay (XVI) and inserted a 3 way jumper to connect relay socket pins 30 and the (2) 87 and 87 pins together ?

Also Stepson made some good suggestions on cleaning your injectors. Although sending the injectors out to be professionally cleaned is best - here is also a Utube demo- showing a pretty good stand-up/sit-down home grown procedure. Be careful to only apply + 12 volt power to the injector coil for very short bursts so they don't over heat. The normal pulse length is in milli-seconds.

Many years ago I bought a match box sized hand held digital injector pulser that allows me several selectable pulse rates for troubleshooting and cleaning. This rig is still reasonably priced and has paid for itself many times over.

https://www.youtube.com/watch?v=rUUgR94drxg

Good Luck - Michael
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1984 928S - "Miss Purdy"
1987 911SC - "Frau Helga"
1986 930 - "Well Hung"
1975 911 Targa "Blue Who"
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Last edited by JK McDonald; 12-19-2018 at 09:26 AM..
Old 12-19-2018, 09:16 AM
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John, that isn't unreasonable at all - the cheapest one I could find online was $130. By the time I had it shipped, it would've been close to $200. Looks like I'll have it installed! Thanks for the tip on the year compatibility!

Michael, I did jump the relay at first but it didn't help any. I pulled the relay from my 83 (which worked when I last ran it about 3 years ago) and it's in it currently. Hopefully once I clean the injectors the problem will be resolved. Once or twice I had the car idling extremely low on its own for about 15 seconds, firing on about half the cylinders. I think it's ok electrically.

I'll watch that video and look into the injector pulser. That would be cool to have!

The first time it backfired through the intake it forced the boot that connects the upper plenum to the throttle body up a bit and likely damaged it - it's very possible I have a vacuum leak because of this. I need to get a new boot for that and also the 8 that connect to the spider.

Thanks!
Jonah
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed

Last edited by 1982_928; 12-19-2018 at 05:50 PM..
Old 12-19-2018, 05:03 PM
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Quick update - I cleaned the injectors, put new hoses, and after re-installing them it fired right up and ran. Still won't idle great but it has a bad vacuum leak. I placed an order for the TB boot and the 8 spider boots from Roger today. I believe that'll make a huge difference on how it runs.
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed
Old 12-22-2018, 03:27 PM
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Great job, Jonah!

Let me know of anything you might need before the breakfast, and I'll put it in my car for delivery to the breakfast.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 12-22-2018, 05:29 PM
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Thanks John! Can't think of anything yet other than maybe those door panels you mentioned.

The CT cranks unevenly and is missing on cylinder 5. I'll test compression after Christmas but hopefully it has compression in that cylinder.
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed
Old 12-23-2018, 04:44 PM
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Check the spark plug wire first
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 12-23-2018, 06:48 PM
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Jonah,

Got any updates??
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 01-13-2019, 07:41 PM
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I think it was originally a 924 color, if its the shade of copper I recall. Its my wife's favorite color, but very rare.

Just my opinion, but trying to find just enough of the things wrong to get it running is long term a total waste of time. Make a plan and replace all the normal wear items.
Old 01-13-2019, 09:01 PM
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Jonah has got it running, just not 100%

It was repainted. It is not the original paint color.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 01-14-2019, 09:36 AM
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Haven't had a chance to mess with it since before the breakfast; been extremely busy and college started back up for me today so that'll keep me occupied until I get settled into the classes. I hope to get back on it soon. I do plan to do more than just get it running, but I think it would be silly to start changing everything and creating a number of extra variables until I get a few major things sorted out.

I believe the original color of the car was some shade of red, according to what I can see through the gold under the hood.
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Jonah Boyd
78 928 5 speed
82 928 auto
83 928s auto
74 260z 4 speed
Old 01-14-2019, 02:47 PM
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I spoke with Ali on Saturday about the CT. He said that when he worked on it, there were a lot of parts that were replaced by new. You really should talk to him sometime.

I think he also said when he took it out for a drive, the brakes would lock up. He was thinking it was a brake booster issue. I just wanted you to be aware.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 01-15-2019, 06:57 AM
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