7.3 Smoke

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Jun 14, 2013 | 06:32 PM

Dougv

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7.3 Smoke

I have a 2002 F550 with bad smoke problem. It has almost new injectors, turbo and FICM. The RPM's wont go over 2000 and it act like the engine is back firing. What do you think is wrong?

Jun 14, 2013 | 06:46 PM

joebob3093

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From: Powell Butte, OR

First off the 7.3 doesn't have a FICM.

Do you have a scan tool or know anyone with one.

Jun 14, 2013 | 08:26 PM

Dougv

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I'm sorry. Been working on too many 6.0. I do have a scan tool. Contribution test and buzz test show nothing. The engine runs great at idle.

Jun 14, 2013 | 09:24 PM

joebob3093

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From: Powell Butte, OR

what is making it not show anything? or are they passing both tests?

Jun 14, 2013 | 09:34 PM

Dougv

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It is passing both test.

Jun 14, 2013 | 09:36 PM

joebob3093

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From: Powell Butte, OR

hows the ICP and duty cycle? does it have a chip?

Jun 14, 2013 | 09:42 PM

Dougv

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This engine is stock. The ICP duty cycle is around 35percent if I remember right. It seems normal to me. We have 70 psi fuel pressure and it never drops below 65.