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Engine cuts out


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1990 Subaru sportswagon (L series or a Leone depending who you are talking to)

single carby.

Pulling out of shopping centre , apply brakes , engine stops immediately. ODD I thought turned the key and started up (simple, no issues (new battery)) and drove home.

parked, idled, no problem.

Next day, wife goes shopping same thing happens multiple times when she takes foot off pedal to apply brake.  has to start car again.

I look under the hood / bonnet and clean distributor cap (but it didn't need it , as I had done a job on it not that long ago)

I start the car ...stops immediately take foot off pedal.

1/2 hour later I am playing around again after looking in my manual. This time starts. Over and over again...no problem.
I tell my wife, and she goes out with the car...and comes back 5 minutes later...it is doing it again.

I try in the driveway...and same.

 

i try again letting pedal down slowly and it is OK and idles fine. I try again , push down hard and let foot off pedal quickly,,,,,slows to a quick idle. Try again...slows to a gentle idle.

 

Any suggestions?

 

there is a plug in the carby that has some rubber or something covering a screw . This is the idle adjusting screw....and taking the plug out, I was able to adjust the idling up and down....but I don't think that is the problem....or it would have cut out quickly when I slowed it down.

 

I took it out for a spin....and no problems. But I am concerned....As my wife is leery about driving it now.

Can I pick your collective thoughts, so that I might try a few things.

Perhaps a can of compressed air...shot here and there. ? your ideas are welcome.

thanks

rae

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...apply brakes , engine stops immediately...
Could be  a short somewhere in the electrical system.  Somehow the brake may be triggering the problem.  Has there been any electrical work done on the car recently ?  Any other changes or events occurring before the problem started? 
 
One other possibility is the vacuum line to the brake booster.  Disconnect it from the engine and plug it and see if the brake problem still occurs.  Could be a problem with the brake booster
Edited by Dee2
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DEE2   is there a brake booster in all these models...I don't see one (not power assisted)

Len DAwg Could be...will change filter...

float sticking....why would that happen when brake applied (at very slow speed)?

 

Dave T  and ivantruckman

There are two sets of wires ..one going to thermostat

and second just below...I am guessing this is the solenoid you are referring to. (there are no other wires going to carby)

 

I do have a second carby....that I could fit. ( a lot of tubes and such to do....but maybe that is the way to be sure)

 

All other ideas also welcomed and will be processed and possibly done....before I get to work on exchanging carby.

(not sure I can change it without making myself more trouble)

 

thanks all

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I assume there is a brake booster.  Most vehicles have one.  It's the big round thing by the brake master cylinder.  Google "subaru leone brake booster"  and look at the images to see what it looks like.  There is a rubber hose coming off the booster that goes to the engine.  Disconnect it from the booster, plug it and then see if the problem is resolved.

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