Vehicle & Technical > Range Rover

Suddenly no spark

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anaxemurderer:
Hello all

Got a new problem. Went to start rangie this morning for play day. Wouldn't fire? cranked for ages, bumped it jumped it... nothing. Definately getting fuel, checked a plug and no spark? It was running fine last night when i moved it and now nothing.

What would be likely culprits? obviously i haven't had time to check much yet?

Its a 3.5 on su carbs with original distributor etc.

thanks

Nick

clbarclay:
You don't get a spark at a plug, how about at the dizzy?
Remove the HT lead and get some fool to hold it about 1/4" from a suitable earth and see if that sparks when engine is cranked. Don't crank the engine too long as if it does spark the fool my shout yes and then try to move the lead away from the earth, resulting in a mild discomfort :roll:

The official workshop manual has a good section in it for diganising the source of spark issues.

A friends 3.5 carb suffered a similar sudden lose of sparks which turned out tho be the ignition amplifier that had failed. Instead of like for like replacing the sepereate ignition amp, he remote mounted the later type of inginton amp that normaly fits to the dizzy at a fraction of the price.

squaddie_fox:
agree with the above, its either the amp or the coil! easy to replace them.

anaxemurderer:
Pardon my ignorance (still only learning this new fangled petrol technology!), but what is the ignition amplifier. I can't see anything that even closely resembles what ifound through google searchs or any mention of the item in my haynes book of lies!

Don't think its the coil, as i swapped that for a spare (which was ok when i took it off before, only had a crack in plastic terminal).

Anyhow i stil haven't had a chance to look into it, what with work and needing two people to check for spark/turn key.

Thanks for the advice though

Nick

squaddie_fox:
the amplifier is a small black box almost a square, which will be located either on the distributor or on the wing near the coil. have you had the dizzy out? my mate did it and broke the counter balances on the dizzy.

is the rotor arm etc all ok?

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