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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

What to test next

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Old Aug 20, 2012 | 10:41 PM
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What to test next

Ok I had a blown piston which I just replaced. Now the 1986 302 EFI v8 will not start.

I have good compression 90-115psi
Good spark on all cylinders
New fuel injectors with good fuel pressure

What do I get when I reinstalled the engine nothing but a deal turn over.

Check computer error code 51. Replaced coolant sensor error code gone. Checked coil spark ok.

What else do I need to check?
 
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Old Aug 21, 2012 | 07:35 AM
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Make sure you have voltage on the common colored wire that feeds the injectors. You will have two common wires, both the same color that feed all the injectors.

This diagram says it's a red wire that comes from the EEC relay.. http://www.autozone.com/autozone/rep...&imageName=Fig. 20: 1986 F-Series pick-up and Bronco, section two
 
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Old Aug 21, 2012 | 05:22 PM
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Thanks for the info will have a look when I get home today.

Originally Posted by Franklin2
Make sure you have voltage on the common colored wire that feeds the injectors. You will have two common wires, both the same color that feed all the injectors.

This diagram says it's a red wire that comes from the EEC relay.. AutoZone.com Repair Guide Image. 20: 1986 F-Series pick-up and Bronco, section two
 
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Old Aug 21, 2012 | 07:56 PM
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Ok.

I've tested each injector red wire and have 12volts with key on. Each spark plug is wet when removed.

I'm at a lost. This is my first moden car withi fuel injection.



Originally Posted by Turk186
Thanks for the info will have a look when I get home today.
 
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Old Aug 21, 2012 | 08:43 PM
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It's not even trying? Take and hold the gas pedal to the floor and crank it, and see what happens. This will put the computer in the "clear flooded engine" mode and turn the fuel off to the injectors.
 
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Old Aug 22, 2012 | 08:57 PM
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Originally Posted by Franklin2
It's not even trying? Take and hold the gas pedal to the floor and crank it, and see what happens. This will put the computer in the "clear flooded engine" mode and turn the fuel off to the injectors.
I burnt out the starter relay and replaced it. Still would not start. Did what you said and wham! Fired right up. Now starts with ease. I was going crazy. A big thank you.
 
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