All fine but a very weak spark, engine will not start.
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- Posts: 94
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- Location: North of Brissie and east of the place to the west
All fine but a very weak spark, engine will not start.
Hi,
The engine in the rod will not start. So far checked all of the below
Battery very good
Fuel pump very good
All lights and dash lights work
Starter cranks full bore
Petrol tank 3/4 full
Fuel squirts in the carburettor at crank
The thing will not start
Checked the spark with a spark plug removed and held against the engine
block cranked the engine and the spark is very weak.
I am at a loss what it could be.
Any pointers will be most welcome.
The engine in the rod will not start. So far checked all of the below
Battery very good
Fuel pump very good
All lights and dash lights work
Starter cranks full bore
Petrol tank 3/4 full
Fuel squirts in the carburettor at crank
The thing will not start
Checked the spark with a spark plug removed and held against the engine
block cranked the engine and the spark is very weak.
I am at a loss what it could be.
Any pointers will be most welcome.
No matter where I go, there I am, spooky
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Re: All fine but a very weak spark, engine will not start.
It sounds like the gap has closed up on your points.
Dany
Dany
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- FRANK BASILE
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Re: All fine but a very weak spark, engine will not start.
What engine, what ignition system ? This may help suggestions. Crook points will be a start if points type. Crook coil . Weak spark also if the bypass is not connected ,this gives full volts across coil when cranking . Points coils are 8volt running through a ballast on normal run ,when cranking the ballast is bypassed so voltage drop does not affect the coil supply adversely. I assume that the engine was normally starting beforehand anyway so this can be discounted. Or if electronic HEI system without points the module could be suspect.
OZ-E-Rodders Rod and Kustom Club Member #31
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- Joined: Wed Nov 23, 2011 1:53 pm
- Location: North of Brissie and east of the place to the west
Re: All fine but a very weak spark, engine will not start.
Thanks for the replies.
The engine is a SBC, with carby. Was running until a couple of weeks ago. Tried to start it a few days ago, and no go as described. I will go over the wiring in the coming week to make sure there is no short anywhere.
I will come back after that.
The engine is a SBC, with carby. Was running until a couple of weeks ago. Tried to start it a few days ago, and no go as described. I will go over the wiring in the coming week to make sure there is no short anywhere.
I will come back after that.
No matter where I go, there I am, spooky
- FRANK BASILE
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Re: All fine but a very weak spark, engine will not start.
Unlikely to be a short. Nothing at all would be the result. Does it have points? . Check that they are ok, and the small earth strap grounding the breaker plate to inside the distributor to the housing is ok.
OZ-E-Rodders Rod and Kustom Club Member #31
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Re: All fine but a very weak spark, engine will not start.
Check points condenser
Faulty condenser will give weak spark
Faulty condenser will give weak spark
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Re: All fine but a very weak spark, engine will not start.
Check points condenser
Faulty condenser will give weak spark
Faulty condenser will give weak spark
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Re: All fine but a very weak spark, engine will not start.
Have ya tried a good squirt of Start Ya Bastard ?
- HOT ROD FRED
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Re: All fine but a very weak spark, engine will not start.
Is your coil ballast resisted? Check that the resister hasn’t burnt out
- steve the ford guy
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Re: All fine but a very weak spark, engine will not start.
Yes if there's no fuel in the cylinders or manifold from sitting a long time you'll need to try this firstGreg N Smith wrote:Have ya tried a good squirt of Start Ya Bastard ?
- FRANK BASILE
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Re: All fine but a very weak spark, engine will not start.
I should have asked, when it last run?.
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- jeffa
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Re: All fine but a very weak spark, engine will not start.
Hi Frank.FRANK BASILE wrote:I should have asked, when it last run?.
As per OP's previous: "Was running until a couple of weeks ago."
He didn't say what sort of ignition though.
Yeah. I've changed my signature. The old one was out of date...
What if climate change IS a hoax, and we make a better world for nothing?
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- FRANK BASILE
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Re: All fine but a very weak spark, engine will not start.
Yes jeffa. Makes a difference to the fault finding . A crook module can also produce a weak spark. Had one do that in a VH Commodore HEI . Similar if the module is not earthed properly. That earth is via one of the Bosch module cover screws on the distributor clamping it..jeffa wrote:Hi Frank.FRANK BASILE wrote:I should have asked, when it last run?.
As per OP's previous: "Was running until a couple of weeks ago."
He didn't say what sort of ignition though.
OZ-E-Rodders Rod and Kustom Club Member #31