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What could be wrong with car that cranks but wont start it has fuel and spark?
Wiki User
∙ 13y ago
There are 4 things an engine needs to run; Fuel, Air, Spark, and Compression. Your engine isn't getting one of those 4 things.
Check the air intake for restrictions as a clogged air filter. Next verify that the injectors are actually delivering fuel to the engine by unbolting the fuel rail and pulling the injectors out a little. Have someone crank the engine and watch to see if they are spraying fuel. If that checks out, you need to get a compression gauge. Your insert the compression gage into a spark plug port and crank the engine (you need to also disconnect the ignition coils).
I can't give you the exact compression specification without knowing the year of your car, but you should be able to find it through an internet search or by contacting the service department of a VW dealership. If the compression is off, then the timing chain might be broken, the heads could be shot, or the piston rings need to be replaced.
Wiki User
∙ 13y ago
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