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gorogorogo
Joined: 10 Nov 2020
Posts: 7
Location: Ontario, Canada
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 Posted: Wed Nov 18, 2020 6:33 am Post subject: 1979 924 air flow sensor plate missing: replacement options? |
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I bought a 1979 Porsche 924 (obviously not working very well) to restore over the winter. It wasn't running very well (to say the least), but I did managed to get it from the driveway into the garage. In attempting to troubleshoot the fuel system I looked at the metering assembly. Apparently someone had just removed the air flow sensor plate entirely.
The part listed for the 1979 is 911-110-943-002. The Bosch website lists a replacement for the Porsche 924, but the internal Porsche number is 911-110-943-003.
What would the corresponding Bosch part for my vehicle? It's 2.0L NA engine. Are the 911-110-943-002 and 911-110-943-003 interchangeable are they different. Sorry if this is a dumb question, I'm somewhat new to the whole vehicle restoration thing.
EDIT: I can't read very well apparently. Anyways I found the plate on the part and the number on it is: 0 438 120 101. There is a second number below it which I don't know the meaning of. It reads: 047 133 353D
Last edited by gorogorogo on Sat Nov 21, 2020 8:52 am; edited 1 time in total |
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MikeJinCO
Joined: 08 Jun 2010
Posts: 1246
Location: Maysville, Colorado
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| Posted: Wed Nov 18, 2020 1:45 pm Post subject: |
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The part number you found is for the turbo charged motor, I'd doubt that it would fit in the flat topped NA air flow meter. The previous page ofthe PET shows the NA unit I have both a '77 and a 78 air flow meter with the fuel distributor. I believe (may well be wrong)those plates were matched to the taper cone so parts not very interchangeable. Unfortunately I'm going to be leaving town for about 2 weeks tomorrow. I would not make any guarantee that the either fuel metering unit is not in need of a rebuild. The '78 sat for 15 years before I got it and I think I remember some gas coming out of it when I took the car apart. If you need the PET(parts list) look at clarksgarage.com primarily a 944 site but has the downloadable 924 PET in the maintenance section.
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Mike
'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild) |
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gorogorogo
Joined: 10 Nov 2020
Posts: 7
Location: Ontario, Canada
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| Posted: Wed Nov 18, 2020 4:51 pm Post subject: |
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| MikeJinCO wrote: | | The part number you found is for the turbo charged motor, I'd doubt that it would fit in the flat topped NA air flow meter. The previous page ofthe PET shows the NA unit I have both a '77 and a 78 air flow meter with the fuel distributor. I believe (may well be wrong)those plates were matched to the taper cone so parts not very interchangeable. Unfortunately I'm going to be leaving town for about 2 weeks tomorrow. I would not make any guarantee that the either fuel metering unit is not in 0 438 120 060 of a rebuild. The '78 sat for 15 years before I got it and I think I remember some gas coming out of it when I took the car apart. If you need the PET(parts list) look at clarksgarage.com primarily a 944 site but has the downloadable 924 PET in the maintenance section. |
You are right. I was looking at the wrong part. It seems like the AFM in 2.0l naturally aspirated was used on Audi 80 and some other stuff. You can get a new one. It doesn't look like the plate itself was ever offered as part (which makes sense if it was made to match the housing). |
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D Hook
Joined: 02 Nov 2002
Posts: 3158
Location: Omaha, NE
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| Posted: Wed Nov 18, 2020 8:50 pm Post subject: |
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There should be a number plate on the side of your fuel distributor. If you post that it may help someone determine if they have one that would work for you.
I'm not sure how you got it to run without that plate in place.
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'80 924 n/a SOLD |
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924-76
Joined: 05 Jun 2006
Posts: 1489
Location: Ontario, Canada
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| Posted: Thu Nov 19, 2020 5:42 am Post subject: |
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I'm in Ottawa, Ontario and I may have one in my part bins.
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1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP |
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924-76
Joined: 05 Jun 2006
Posts: 1489
Location: Ontario, Canada
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| Posted: Thu Nov 19, 2020 10:22 am Post subject: |
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Must have sold it, I looked this PM and couldn't find it.
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1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP |
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Ratbikerich
Joined: 24 Sep 2020
Posts: 8
Location: Scottsdale AZ
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| Posted: Sat Nov 21, 2020 7:32 am Post subject: |
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| I have a 1978 NA that I am converting to bike carbs so I should have what you need. I’ll dig though my parts tomorrow and give you an update. |
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joewest
Joined: 06 Oct 2005
Posts: 234
Location: Portland, OR
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| Posted: Sat Nov 21, 2020 7:46 am Post subject: |
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I have an excellent complete assembly from the air box to the fuel injectors for sale if you are interested. Worked great when I removed it to convert my '79 to EFI. Let me know!
For some reason my post is missing from the sale section of the forum..
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'79 924 Supercharged / Track Prepared
'80 931 Daily Driver - Sold
"The number of posts in my profile may represent the number of times I have screwed something up...and admitted it here." |
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gorogorogo
Joined: 10 Nov 2020
Posts: 7
Location: Ontario, Canada
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| Posted: Sat Nov 21, 2020 8:46 am Post subject: |
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| Ratbikerich wrote: | | I have a 1978 NA that I am converting to bike carbs so I should have what you need. I’ll dig though my parts tomorrow and give you an update. |
I actually thought about converting to bike carbs for a minute, but I don't have any extra ones (they're all on motorcycles). If you've got one let me know! |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Sat Nov 21, 2020 8:58 am Post subject: |
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Pretty impressive you got it to run well enough to move under it’s own power with no airplate, lol..
Your AFR screw must be set incredibly rich 
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80 Turbo - Slightly Modified |
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gorogorogo
Joined: 10 Nov 2020
Posts: 7
Location: Ontario, Canada
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| Posted: Sun Nov 22, 2020 9:16 am Post subject: |
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| Fasteddie313 wrote: | Pretty impressive you got it to run well enough to move under it’s own power with no airplate, lol..
Your AFR screw must be set incredibly rich |
I have no idea. I'm not overly familiar with motor vehicles, but the I feel like the thing shouldn't have run at all. The screw that sets in the initial position of the sensor is gone too. The total lack of airplate kinda explains the odd behaviour (idle speed would change every time I started it, at first it would bog down if you applied any throttle). From working on motorcycles I knew that something was "off", but I didn't expect something quite like this. haha. |
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Ratbikerich
Joined: 24 Sep 2020
Posts: 8
Location: Scottsdale AZ
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| Posted: Thu Nov 26, 2020 1:12 am Post subject: |
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I actually thought about converting to bike carbs for a minute, but I don't have any extra ones (they're all on motorcycles). If you've got one let me know![/quote]
Yeah I have 2 of the complete air mass meter assemblies. Do you want the entire assembly or just the plate?
I'm using 40mm carbs off a YZF600 and enlarged the valves to correspond with increased fuel. I'm still a few weeks away from firing it up since I need to install a new radiator and fuel cell. |
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924 FAQ (Technical)
