Question about 1987 Jaguar XJ6

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1987 vanden plas won't start

1987 vanden plas with a straight six sat up for a while and will not start. drained all the gas put fresh gas in pulled the fuel line to make sure it was getting gas and it is. the spark from the plug wires are a little weak but it does have spark any ideas why it only spins but won't start?

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Ignition problems x300 1997
Battery is good
crankshaft is good
ignition problem
just a small fire ....one second no more

Posted on Aug 21, 2011

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The fuel has to be under pressure in the fuel rail. Quick check for the pressure: pinch off the fuel return line and get an assistant to crank the engine. If it starts....it needs a new check valve in the rail. Fuel is just circulating in a loop from the tank. No pressure being generated to enable fuel injectors to "fire".
If FP ok, then check the neutral sw in the trans selector hsng. if not operated when selector is in P or N engine will not start.

Check air flap in the throttle valve body is not stuck in open position. and is free to operate.The idle bleed /cold start valve needs the air flap to be operational.

Check connecting bellows between throttle body and inlet m'fold to ensure no air leaks. If leaking it will by-pass the control in the throttle body.

Not aware of your skills so for me to start getting into the other possibles would be a bit premature.

Posted on Jan 09, 2011

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