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What is the problem with a 1986 bronco II when it will not start?
Wiki User
∙ 16y ago
You need 3 things for an engine to run. Fuel, fire and compression. The 1st thing to check is fire to the plugs. If no fire you have an ignition problem. Next is fuel. On the injector rail there is valve(looks like a tire vavle) check for fuel at this vavle. If no fuel you have a fuel or electrical problem. And finally compression. Using a compression gauge check the compression of all cylinders. They should all be close to the same. If any are lower, put alittle oil in the cylinder and check again, If it is higher after the oil you have ring problems, if it stays the same it could be blown head gasket, cracked head or block or a hole in the piston. I can't help much further until you preform these test and know results.
Wiki User
∙ 16y ago
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