84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

86 injectors wont pulse

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Old 05-22-2009, 01:01 PM
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crw
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Question 86 injectors wont pulse

I have an 86 4runner that blew a head gasket and sat for about 6 years. I just put on a new head and gasket set, new fuel filter, new fuel pump, new injectors, and drained the tank and put in new gas. It will crank only if I spray starter fluid into the intake and then it dies once the starter fluid is burned. All the injector connectors show 12 v on each wire. I put a noid tester on the connectors and they are not pulsing when I turn the engine over. I jumped the diagnostic connector and get codes 7 and 11. Any help on how to figure out why there is no injector pulse would be greatly appreciated.

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CRW
Old 05-24-2009, 08:48 AM
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The wiring harnesses are notorios for having breaks at the connections. You might start testing continuity at the injector and work your way backwards. They fire two at a time so it's a bit unusual that none of them will pulse. Of course I'm not sure if the engine will run on just 2 cylinders; I'm guessing not.
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