Help with smoke
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4wd Low
Joined: Oct 2025
Posts: 11
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From: West Texas
Help with smoke
My 2001 f350 was having a little bit of a hard idle. I did a buzz test and two injectors failed. They were on opposite sides. I have a 99 f250 that i stopped driving.I swapped injectors on my 2001 7.3 with injectors off my other truck that had only 6 months of use. I removed and installed them with no error(to my knowledge). When starting the truck it was billowing smoke out the exhaust and under a little pedal it was worse than a coal train. I turned engine off, and went and did some running. After 3 hrs I started it up and no smoke under idle but still thick clouds under pedal. I am clueless to what I did wrong when I swapped the injectors. One of the injectors I swapped with looked like it had carbon buildup on it. Could that be the culprit?
** even though two failed the buzz test i swapped all 8 because I figured having 8 injectors with 6 months of driving is better than only have two new injectors and 6 old injectors.
** even though two failed the buzz test i swapped all 8 because I figured having 8 injectors with 6 months of driving is better than only have two new injectors and 6 old injectors.
Last edited by Greenpowerstroke; Oct 18, 2025 at 08:36 AM.
Fleet Mechanic
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