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I HAVE A 1995 F350 7.3 DIESEL AND AFTER A INJECTOR BUZZ TEST…

Customer Question
I HAVE A 1995...

I HAVE A 1995 F350 7.3 DIESEL AND AFTER A INJECTOR BUZZ TEST A GET CODES P1271,P1272,P1273,P1274,P1275,P1276,P1277,P1278 ROUGH IDLE NO HARD CODES WHEN SCANNING AND NO ENGINE LIGHT. RUNS GOOD WHEN COLD BUT AFTER HEATING UP IDLES ROUGH. 48000 ORIGINAL MILES AND JUST REPLACES BOTH VALVE COVER GASKETS AND PIG TAILS.

Mechanic's Assistant: Are you hoping to fix this yourself?

YES

Mechanic's Assistant: Great! What have you tried so far?

BOTH VALVE COVER GASKETS, ALL PIGTYAILS TO INJECTORS, CAMSHAFT POSITION SENSOR

Mechanic's Assistant: Is there anything else important you think the Ford Mechanic should know about your Ford?

THE VEHICLE HAS LOW MILAGE AND ITS ALL STOCK

Mechanic's Assistant: Our top Ford Mechanic is ready to take your case. Just pay the $5 fully refundable deposit and I'll fill the Ford Mechanic in on everything we've discussed. You can go back and forth with the Ford Mechanic until you're 100% satisfied. We guarantee it.

Submitted: 2 years ago.Category: Ford
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Customer reply replied 2 years ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Answered in 9 hours by:
3/15/2016
Ford Mechanic: sprinkles08, ASE Certified Technician replied 2 years ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Ford
Satisfied Customers: 23,859
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

Hello and welcome to JustAnswer!

These are all injector control circuit codes as it looks like you know. These codes set when the circuit resistance of an injector control circuit is incorrect. Possible causes are the engine controller (unlikely), wiring and connections, or the injectors themselves. The most likely cause would be injectors but it isn't common for all to fail at once.

Has the resistance of each injector been tested at the time the engine is hot and running poorly?

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Customer reply replied 2 years ago
No not yet I'll check them in the morning
Ford Mechanic: sprinkles08, ASE Certified Technician replied 2 years ago

Great!

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Customer reply replied 2 years ago
What is the procedure for checking resistance on the injectors? Do you probe it at the valve cover gasket?
Ford Mechanic: sprinkles08, ASE Certified Technician replied 2 years ago

You can test there but if you found a resistance issue then you'd still need to test right at the injectors.

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Customer reply replied 2 years ago
Ok I tested at the pug and there all around the 0.1 ohms range
Customer reply replied 2 years ago
Plug*
Ford Mechanic: sprinkles08, ASE Certified Technician replied 2 years ago

Where specifically are you putting each test lead, and are you testing the circuits for a short to power and ground?

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sprinkles08, ASE Certified Technician
Category: Ford
Satisfied Customers: 23,859
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Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience

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