87 xj6 no spark no fuel i need help - Jaguar Forums - Jaguar Enthusiasts Forum

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87 xj6 no spark no fuel i need help

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Old 03-15-2012, 08:42 PM
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Default 87 xj6 no spark no fuel i need help

hi i have a 1987 jaguar xj6 4.2 liter the car ran fine i shut it off and the next day it would not start no spark i replaced the coil the ignition amplifier and the magnetic pick up in the dist and still no spark i tested ignition switch it reads good also no fuel i jumped the fuel pump relay and it works but when i turn the key it wont come on
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Old 03-15-2012, 09:03 PM
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Run a jumper wire from the battery "+" post to the coil "+" post and see if you get spark.

How's the wiring to the coil? It often breaks from heat.

For the record, the fuel pump will not operate by simply turning the key "on". It should operate with the engine cranking...does it? (Trick: put the gearshift in "D" and turn the key to "start". You should hear the fuel pump run)

Also, remove the air filter housing and push open the the air flap at the front of the air flow meter, igntion key on. The pump should operate. Does it?

Here's a fuel pump checklist with more detail:
Fuel Pump Circuit Checklist

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Doug Dwyer
Pacific Northwest USA
1988 Series III VDP V12
1985 Series III XJ6
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Old 03-16-2012, 05:16 AM
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And the EFI relies on the coil pulse to time the injectors, so no spark = no fuel injection.
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