shaun

hi ive been driving a 924(1980) for the last 4 years in the UK and for the most of that time the car has been causing little trouble. however in last 2 months its been behaving strange. it all started when i parked overnight and by the morning the engine would turn over but would not start. This was ok as i located a burnt out pump relay fuse and it sorted out the problem.

but a few weeks later again the engine would turn over but would not start.However this time the pump relay was fine. my local mechanic said i needed to change-plugs-ignition coil-rotar and this was done.Again the car was fine until recently when the problem started allover again. This time i couldnt understand why and called in the AA. The AA checked the car over and again to my suprise the fuel relay had blown away!!

This time a reading instrument was placed in the relay fuse and it mesured 9amp, which i belive is way over the norm(6.5 amp). Anyway what could be causing this??? cheers

Rob

[quote] This time a reading instrument was placed in the relay fuse and it mesured 9amp, which i belive is way over the norm(6.5 amp). Anyway what could be causing this??? <hr></blockquote>

Plugged fuel filter maybe?

Rob

shaun

hi rob- the other thing is that at present im bypassing the pump - to relay by wiring tell i sort this out. The other thing is that the petrol is trikling out slow instead of a rush. Is the pump responsible for this-i can hear it working when engine turns?

Rob

[quote] The other thing is that the petrol is trikling out slow instead of a rush. Is the pump responsible for this-i can hear it working when engine turns? <hr></blockquote>

I'm sorry, but I don't understand. Trickling out of where?

Rob

xcessiv

I think you need a new fuel pump.

shaun

hi, well i changed the fuel pump and had hoped that this would put all the troubles behind me. But only 6 minutes after as i was driving the car, it suddenly swithed off. i couldnt turn it back on, engined turned but no luck. So called the AA again, they checked and now say there is no spark . What could this be now?

Mike B

Did you drain your fuel tank when you changed the pump...It's very possible the tank is corroded and the corroded crap is blocking the fuel line which might have had something to do with you fuel pump dying...Same thing happened to my son's '78...

shaun

no mike i didnt do that. But the fuel pump is now working fine but the spark has vanished from the car and this is a new problem. The positive thing i guess is now the car is finally broken down and we can now hopefully locate where the problem may be.

my hunch is on the ignition control unit. ive read a few things on it but could anyone else explain it more?

Dennis Wilson

Shaun,

I would check all of your body and engine ground points. Increased resistance at the ground points can do weird things to all of the electrical system.

Dennis

shaun

thx dennis will do. what i need is a an expert on this but i cant find such people here in the UK. Ive spent a small fortune so far but havent managed to get a result. Anyway im not one to give up easily, although its driving the wife crazy.

Rob

[quote] So called the AA again, they checked and now say there is no spark . What could this be now? <hr></blockquote>

Do you know how they checked for spark? Was it at a plug wire or from the coil? If you are not getting any spark from the coil, I would check the speed & reference sensors located on the top of bellhousing and the connectors are typically at the back of the intake manifold. First make sure the connectors are connected (no broken connector housings). Next, disconnect one at a time and check the restistance of each. Don't mix up the connectors of the two sensors or it will never start. Each sensor should have ~900 of resistance if good. If you didn't get spark by checking a single plug wire you could have a bad/loose ignition rotor or a broken timing belt

Rob.

marky522

the 1980 924 doesnt have the speed and ref sensors, i would also reccommend checking the grounds, you would get more ansewers at <a href="http://www.924board.org" target="_blank">www.924board.org</a> this is a 924 specific site

Mark

Rob

[quote] the 1980 924 doesnt have the speed and ref sensors <hr></blockquote>

<img src="graemlins/c.gif" border="0" alt="[ouch]" /> Doh!!

Sorry about that, I don't know why I was thinking it was an 87 924s.

Rob

shaun

thx again for the replies. Ive tried to register on the 924board but cant sign in at all. i will check the grounds as soon as possible. the ignition coil was tested and it was ok but the distributer seemed to be faulty.

xcessiv

Just an FYI. I don't even drive the 924 right now because I have grown tired of the electrical problems. I went through what you are going through, you probably have a bad ground somewhere that is making havoc in you current flow, and therfore burnig out whatever is weakest. it sounds like your ignition relay now. You can actually take it apart to repair it, if it is not ruined(I have done this on the 944), but it is not for the faint of heart. Before I drive it again I am going to reroute the grounds from the relay panel to an additional ground that then connects to the battery ground, which of course goes to the engine (earth). this should make a better ground and eliminate noise. The other thing I am going to do is disassemlbe the relay and fuse panels, clean and grease them with dielectric(sp) grease. Maybe, just maybe my temp gauge will not double as a tach. Remember to check all the fuses, it could be that simple. I would reccommend that anyone with an older 924 do the same. Good Luck. I knew nothing about electricity when I got this car.