Ran out of fuel now won't run
03-25-2019, 03:29 PM
#1
Ran out of fuel now won't run
Damn and blast ! I'd just got my 83 Euro Cis running well enough to use and I do a stupid thing like that . My car stopped in the middle of my town , rush hour next to some traffic lights . I bet people swore about me . Anyway got a gallon of fuel put it in and she fired into life albeit a little spluttery . I then added 30 more litres of fuel and continued to the garage where I was going to do an oil change and then on to an mot . On the way home the car was missing badly no power and basically running rough . Just wondering what I should check I think I've covered the basics this is what I've done so far . New fuel filter ( old one wax only 20 miles old )
pulled out injectors well 6 as two twisted in seal , they all seem to be misting fine
system pressure at 75psi
cracked off eight banjos on top of fuel distributor and fuel all seem to flow out evenly
disconnected fuel injectors and put pipes into jam jars ran fuel pump and pushed down on plate to dispense fuel into jars . All gave about 50-55 ml of fuel in 15 seconds of squirting on max
ive removed the plugs they were very black and damp but that could be because I'd been trying to get to run by turning mixture screw . I've cleaned them but left them out to dry out the cylinders after operating injectors
What can i check next ?
How do do I get a base setting on the mixture screw
The tester said it was A bit rich but I don't know if he adjusted it I doubt it .
I do not have a little filter on the inlet of the fuel distributor . That had been poked through by the po
could the cold start be stuck open , where does it live ?
I havent done anything with the WUR apart from check the gauze on the inlet side and it appeared clear . Not sure of pressures required at cold on control .
Any ideas welcome please , I've spent six months fixing tinkering preparing and now all I want to do is drive it .
pulled out injectors well 6 as two twisted in seal , they all seem to be misting fine
system pressure at 75psi
cracked off eight banjos on top of fuel distributor and fuel all seem to flow out evenly
disconnected fuel injectors and put pipes into jam jars ran fuel pump and pushed down on plate to dispense fuel into jars . All gave about 50-55 ml of fuel in 15 seconds of squirting on max
ive removed the plugs they were very black and damp but that could be because I'd been trying to get to run by turning mixture screw . I've cleaned them but left them out to dry out the cylinders after operating injectors
What can i check next ?
How do do I get a base setting on the mixture screw
The tester said it was A bit rich but I don't know if he adjusted it I doubt it .
I do not have a little filter on the inlet of the fuel distributor . That had been poked through by the po
could the cold start be stuck open , where does it live ?
I havent done anything with the WUR apart from check the gauze on the inlet side and it appeared clear . Not sure of pressures required at cold on control .
Any ideas welcome please , I've spent six months fixing tinkering preparing and now all I want to do is drive it .
03-26-2019, 06:19 AM
#4
Just ran pump backwards for a second or two and all was clean . How do I find a starting point with the mixture screw ? Just wondering if mot man messed with it for emmisions ?
03-26-2019, 12:01 PM
#5
Not sure if this is what is supposed to happem . I have screwed clockwise the mixture adjustment and then backed it off half a turn as a starting point . The car still won't run cleanly and appears to be very rich . It will start but misses pops and bangs . I have the fuel pump on a switch that reaches the engine bay . I turn the switch on and I can hear fuel whooshing near the fuel distributor but also as I turn the pump on the plate appears to be sucked downwards . Is this normal or what ? Cheers guys
03-26-2019, 01:25 PM
#6
Rennlist
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You will need to pull out the injectors (or at least a few) to see this: Turn the mixture adjustment until the injectors are not spraying or dripping (with the fuel pump running.) Any movement of the sensor plate (with your finger) should result in the injectors dribbling/beginning to spray.
Pull the cold start valve and make sure it is not spraying or dripping (also with the fuel pump running.)
Dry out the engine by cranking it over with the spark plugs out and the fuel pump disconnected.
Put in a fresh set of spark plugs and try again.
Pull the cold start valve and make sure it is not spraying or dripping (also with the fuel pump running.)
Dry out the engine by cranking it over with the spark plugs out and the fuel pump disconnected.
Put in a fresh set of spark plugs and try again.
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03-26-2019, 04:01 PM
#8
Rennlist
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Very front of the upper plenum. One "AMP" electrical connector and one fuel line going to it.
__________________
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
03-26-2019, 07:10 PM
#9
Rennlist Member
If it was running well enough to drive before this issue you should not need to move the mixture screw! Have you checked spark? I had restarting problem with mine after a tank out job and all lines dry - jumpered to pump relay for a whil to ensure lines were all up to pressure, and it ran. If you have fuel at injectors, and have dried out any flooding, it should go if you have spark. Usual starting point for mixture is with pump running screw miture in (rich) until injectors just buzz open, then back until they stop.
jp 83 Euro S AT 57k CIS
jp 83 Euro S AT 57k CIS
03-27-2019, 04:13 AM
#10
Yes that’s true but we think Mot tester has messed about with idle and mixture screw so they are now both out of adjustment . I’m going to go back to basics for a few days then I’ll report back what I find . I’m worried that some crud may have entered the fuel distributor . The injectors fire a nice spray when I push down on the plate with the fuel pump running , if the fuel distributor was fouled would they still do this ?
03-27-2019, 08:35 AM
#11
Rennlist Member
If all injectors spray somewhat evenly, then I dont think the distributor is a problem, but the mixture might be off .You really need a gauge set to check the system and control pressures. If you dont even get any pops out of it it sounds like a spark problem, or completely flooded.
jp 83 Euro S AT 57k
jp 83 Euro S AT 57k
03-27-2019, 10:15 AM
#12
Yes all injectors sprayed nicely . I connected a new injector on one of the hard lines as a known good value to compare with the remaining old injectors , they were all fine, misting well. When i removed the plugs they were black and damp . i will drain the tank and put in some fresh fuel just in case .Im also going to test the cold start valve for continuous spray . Im pretty certain that the idle screw is out of whack as the tester is a bit vague as to how and what he fiddled with . Question is is there a sort of base position for the idle screw , is there a stop on the screw that can then be wound out by a number of turns to be in the ball park for starting the engine ?
03-27-2019, 06:19 PM
#14
Rennlist Member
I think you may be confused about idle and mixture screws. idle is a large straight screwdriver head in front of the plenum body. If you screw it fully in until it stops you should have no idle. Screw out until hot idle is ~750rpm. the mixture screw is a 3mm allen key into a hole in the rear of the plenum, into the body under the distributor head -. Adjustment is VERY VERY sensitive! Think in terms of LESS than 1/8th turn to make a real change! Inwards is richer.
jp 83 Euro S AT 57k
jp 83 Euro S AT 57k
03-27-2019, 07:17 PM
#15
Thanks but no I understand the two , sorry probably didn't make myself clear enough . I can't get it to run long enough to set idle at big screw . So I was hoping that there may be a base setting that would at least be in the ballpark so that I could be confident that it's not actually preventing it from running . I'm going to wind the mixture screw in until the injector start to fire then back it off a quarter of a turn . I'm then going to attempt to start it , if no start back mixture screw off again a bit until hopefully I can get it to run .