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91 f350 7.3 changed fuel filter and now when I slow down im getting blue smoke

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  • Cars & Trucks Master
  • 2,359 Answers

Let's rule out air pocket in the fuel system.
Press the primer pump for 2-3 minutes slowly to purge out any bubbles.

Posted on Jan 18, 2014

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Blue smoke from 7.3

probably the oil rings on the pistons but might be one of the heads , not good either way

Posted on Oct 09, 2008

brainyass
  • 242 Answers

SOURCE: sputtering during idle blue smoke

You are burning oil, causing the blue smoke. It is mainly cause by worn piston rings. Also will coat your spark plugs with oily residue. Try an oil additive such as "stop smoke" or another such brand to reduce burning your oil and it may recondition your seal sand stop it all together.

Posted on Nov 20, 2008

  • 72 Answers

SOURCE: Very hard to start TDI

not starter motor, if car starts but is slowly smoking like that you are probably burning oil... 

Posted on Nov 21, 2008

  • 1201 Answers

SOURCE: Blue smoke comes from tailpipe

A lower octane gas woudn't cause it to blow blue smoke, more like it needs an engine job. There is oil getting into the combustion chamber, could be valve guides, valve seats, piston rings worn.

Posted on May 09, 2009

  • 14036 Answers

SOURCE: fuel problem on a 91 sonoma 4.3

DID YOU CHECK THE FUEL PUMP FUSE AND RELAY.AND THE FUEL INJECTOR FUSE.SOUNDS LIKE FUEL PUMP NOT WORKING.YOU ARE NOT GETTING FUEL TO THE LINE.NOW IF FUEL PUMP IS RUNNING.THEN THE LINE COULD BE PLUGGED.

Posted on Sep 19, 2009

Testimonial: "thanks yes yhe pump runs but if i put a little starting fluid in the injctor it will start till its dry i checked the fuses maybe the line is clogged "

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1 Answer

Slow acceleration,slow gear change, high usage of fuel,smoking


What color is the smoke?
========
Use a bottle of yellow HEET dry gas to remove any moisture problem in the fuel.

Clean / replace air filter.
Check ATF at level ground. Top off ATF to MAX level.

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CHANGE THE PCV VALVE! YOU SHOULD SEE OIL IN YOUR AIR FILTER TOO IF THIS IS THE PROBLUM

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Blue smoke comes from tailpipe


A lower octane gas woudn't cause it to blow blue smoke, more like it needs an engine job. There is oil getting into the combustion chamber, could be valve guides, valve seats, piston rings worn.

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have you changed the fuel filter lately a plugged fuel filter will cause this concern
did the power loss start all of a sudden or did you start losing power over time ?

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Blue smoke from 7.3


probably the oil rings on the pistons but might be one of the heads , not good either way

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did you replace the fuel filter with the arrows pointing the right way?

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