I have noticed a lot of posts regarding people sending injectors off to have them pop tested and checked over for spray pattern, etc. My curiosity was sparked as colder weather is starting to creap in and more people are reposting possible injector issues, relating to misfire, smoke, etc. - especially when they mention that they recently had the injectors tested and they proved to be "good." When these injectors are tested , are they or should they also be tested at very low temps as well as higher temps? It would seem that with close tolerances inside injectors and spring tensions, etc. that an injector might test good at say 80-90 degrees F, but be on the near or far end of a threshold/parameter that fails drastically when introduced to 0-30 ish degree F temps, due to metal expansion/contraction with temp differences. What do you all think?

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Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi