
Mini Turning Over But Won't Start
#1
Posted 13 August 2015 - 11:50 AM
I have just fitted the mini spares stage one kit and now the car is turning over and not starting again. The car turns over at s good speed but makes no sounds like it's even going to attempt to fire.
I have done/checked the following:
-fuel is pumping out of fuel line to carb
-each spark plug is sparking
-new coil
-new rotor arm
- new dizzy cap (carefully on same way as old)
- the plugs + hit leads (changed one at a time)
-new battery & engine earths
- battery charged
- new choke cable (fitted when doing stage one)
I have noticed fuel is leaking from the inlet to carb when I turn it over. Could this mean the carbs blocked or not letting the fuel in somehow?
I have to call it a day for now but would be interested to know what people think so I have a game plan to come back at it with because I currently stumped!
Cheers,
Jake
#2
Posted 13 August 2015 - 11:52 AM
Attached Files
#3
Posted 13 August 2015 - 12:23 PM
Secondly, block the pipe visible in pic 2 between the float bowl and carb.
Thirdly, in pic 2 the carb to manifold gasket doesn't look compressed...is it?
#4
Posted 13 August 2015 - 12:36 PM
Yeah a clip would be the obvious thing wouldn't it! Doh!
What is the pipe for that is open ended which I need to block?
The carb to manifold all feels tight, I will double check it when I get home tonight but think it's compressed. If not I will tighten it up.
I'll report back with my findings.
#5
Posted 13 August 2015 - 12:37 PM
#6
Posted 13 August 2015 - 12:58 PM
first, check the carb piston lifts freely, then get a small cap of petrol (bottle lid) and pour it carefully down the air intake elbow at the back of the carb and then turn it over. if it starts then you have a blockage or the float bowl valve is stuck.
#7
Posted 13 August 2015 - 01:05 PM
the clips have been slid back on the fuel pipes in the 1st pic so move the to the end where the connect. and as said by chopper the breather needs connecting (is the hose disconnected ?) or blocking off, that could be leaning out the mixture hugely & causing the problem.
#8
Posted 13 August 2015 - 01:50 PM
Pleased to help
#9
Posted 13 August 2015 - 04:10 PM
Then I poured a cap of petrol in the air intake on the carb and the car fired up. So I guess the problem lies with the float bowl? What should I do next?
Also smoke (fumes not fire) was coming from the manifold or connection from down pipe to back box, hard to tell, so I will need to check everything is gap free and tight.
I will attach a photo of clips with me pointing to where I tipped petrol for your viewing pleasure!
#10
Posted 13 August 2015 - 04:13 PM
Attached Files
#11
Posted 13 August 2015 - 04:23 PM
#12
Posted 13 August 2015 - 04:39 PM
#13
Posted 13 August 2015 - 07:37 PM
In ChopperHarris' first post he commented about your second picture and the gasket between the carb and manifold. Is the bracket with the threaded stud "flat" with gaskets on both sides? It looks like it is warped which may be creating a nice air leak. The air leak could be severe enough to lean the mixture so the car will only run on full choke and/or with that extra gas you poured down the carb throat.
#14
Posted 13 August 2015 - 07:58 PM
Also I've been looking at the carb float chamber. As fuel is coming out of the pipe into the chamber and not getting to the carb (as proved by tipping petrol in the air intake?) do you think there could be some issues there? There is about 1/2 inch of fuel in the float chamber I presume this is normal?
I've attached photos showing the none flush stud and fuel in float chamber.
Attached Files
#15
Posted 13 August 2015 - 08:10 PM
Do you mean the stud that's threaded on both ends?
Also I've been looking at the carb float chamber. As fuel is coming out of the pipe into the chamber and not getting to the carb (as proved by tipping petrol in the air intake?) do you think there could be some issues there? There is about 1/2 inch of fuel in the float chamber I presume this is normal?
No, I am not talking about the stud itself. Going back to the pictures, you have the carb, a gasket, a bracket, a gasket, a spacer, a gasket, and finally... the manifold. I am talking about the two gaskets on each side of the bracket sandwiched between the carb and spacer. It looks like there is a gap there and there shouldn't be. Maybe it is just the angle of the camera.
The fuel level in the float bowl is too low. 1/2 to 2/3 full would be correct, 1/2" suggests that the float valve (in the lid) is partially blocked and needs cleaning. Or, the float itself is out of adjustment and it is shutting off the fuel flow way to early/low.
Were I you, I would check the gaskets everywhere between the carb and cylinder head, making sure everything is fully tightened and that there are no gaps. Then I would read over the sections in the manual that discuss the float valve, how to clean it, and how to set the float height. The question I have is why float valve issues would suddenly show up as part of fitting a stage 1 kit. Perhaps your float level was marginal before and is not up to the higher demands with the new parts fitted. Adjusting the float level should help if that is the case.
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