'84 928 - "getting no fuel-type" symptom
Thread Starter
Pro
Joined: Aug 2001
Posts: 554
Likes: 0
From: Athens, GA
'84 928 - "getting no fuel-type" symptom
Started talking to my neighbor about his 1984 928 that has been sitting in his driveway. I noticed it was never driven and asked him what was wrong. He said that it is not getting any fuel. The fuel pump is working and if he pours a little fuel it will run for a second than cut out. He is foreign and his English is not perfect, so I did not quite understand what he meant by "pouring a little fuel". He sounds as if he may want to get rid of it. I am familiar with my 944's but not the 928. Any ideas what this may be? I know this is very little if any info, just thought I'd throw it out there. Thanks in advance.
Addict
Rennlist Member
Rennlist Member
Joined: Jul 2002
Posts: 2,694
Likes: 55
From: AZ
The problem can be anything from vacuum leaks, bad electrical connections (including fuses, grounds), blown fuses, bad relays, broken wires, worn ignition switch, etc. If the car has been sitting a long time, the fuel could be bad too. Then there is the possibility of plugged fuel filters or fuel injectors.
This vintage 928 has L-Jetronic (if it is a north American model). If no 928 fluent mechanic is available, a shop that knows Volvos and other European cars that had similar fuel injection should be able to get the shark running again.
This vintage 928 has L-Jetronic (if it is a north American model). If no 928 fluent mechanic is available, a shop that knows Volvos and other European cars that had similar fuel injection should be able to get the shark running again.
Rennlist Member
Joined: Oct 2003
Posts: 7,210
Likes: 17
From: Nova Scotia
Sounds like a large spoonfull of TLC is required - Rich covered the issues, and I'd start with the clean fuel, pressure test at the injector rail - and then the injectors ( 12v supply and spray pattern). Everything you've learned on the 944 will be equally useful on 928s, should it turn that way ...
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2003
Posts: 1,525
Likes: 0
From: The Vacation State
Up to 1984 L jets have the ninth injector. So the car may start on the ninth injector and stall becuase it's not getting any fuel. I'd start easy and check fuses, especially the injector.
Addict
Rennlist Member
Rennlist Member
Joined: Jul 2002
Posts: 2,694
Likes: 55
From: AZ
One common vacuum leak that will KILL L-jet A/Ts (I know, I suffered from this) is a failure of the the throttle housing vacuum caps. The 5-speed cars have a big vacuum diaphragm that isn't used on the A/T cars. So the A/T cars have plastic caps that covers the ends. If and when that cap(s) deteriorates, there is a large enough vacuum leak that the car will not start or run.
To check, look at the throttle housing from the passenger side of the car, betwen the intake spider. You should see several large caps on the side.
For 5-speed cars, the hoses to the diaphram can crack and leak, or the diaphragm can fail. Same problem, the car won't start.
To check, look at the throttle housing from the passenger side of the car, betwen the intake spider. You should see several large caps on the side.
For 5-speed cars, the hoses to the diaphram can crack and leak, or the diaphragm can fail. Same problem, the car won't start.
Captain Obvious
Super User
Super User
Joined: Aug 2003
Posts: 22,846
Likes: 348
From: Cambridge, Ontario, Canada
This is exactly what happened to my bothers '83 928 a month ago. Turned out the fuel injection relay was bad. If the car start for a few secs first but then dies, I'm almost 100% sure that it's the enjection relay. It is locared in the fuse panel behind the carpet on the passager side foor rest.
The easiest way to check is to locate the relay, (I remeber it being on the top row, in the middle, number XVI (16)), then to remove it. After removal, take off the aluminium cover. Then re-insert the relay and squeez the contact by hand. Doing this and cranking the engine over with the key will get the engine running. If the engine fires, let it run for a 5-10sec, then remover your fingers from the relay. The engine should die. This will tell you vithout a dout that the injector relay if bad.
The replacement relay has to be an exact replacement unit (possible form Porsche). Other relays will look the same but will not work.
As a temporary measure, you can jump the relay. Don't forget to disconnect it at the end of the day. Otherwise it will slowly drain your battery.
This is a simple procedure that doesn't cost anything....... try it first then the other suggestions.
The easiest way to check is to locate the relay, (I remeber it being on the top row, in the middle, number XVI (16)), then to remove it. After removal, take off the aluminium cover. Then re-insert the relay and squeez the contact by hand. Doing this and cranking the engine over with the key will get the engine running. If the engine fires, let it run for a 5-10sec, then remover your fingers from the relay. The engine should die. This will tell you vithout a dout that the injector relay if bad.
The replacement relay has to be an exact replacement unit (possible form Porsche). Other relays will look the same but will not work.
As a temporary measure, you can jump the relay. Don't forget to disconnect it at the end of the day. Otherwise it will slowly drain your battery.
This is a simple procedure that doesn't cost anything....... try it first then the other suggestions.
