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When to replace injectors?

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Old Jan 19, 2022 | 02:32 PM
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Harveyearlolstad's Avatar
Harveyearlolstad
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From: Norcal
When to replace injectors?

Hi all, my 97 f350 has 260k miles on it. Purchased it almost a year ago and i dont think the injectors have ever been replaced or rebuilt. Is it about time or can i go longer? Lately its not been starting on a dime but has been starting on the first crank.
 
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Old Jan 19, 2022 | 04:10 PM
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Normally folks don’t replace them until they show signs of need. Like white smoke, oil consumption, rough running and idling things like that
 
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Old Jan 20, 2022 | 06:25 AM
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Best time to replace injectors is when there is a wad of money that wants to get set free


One path for setting up a plan for injectors is to consider pulling one or two and sending them to an injector shop for testing. Only risk here is a variable amount of downtime as you may decide to pull the remaining injectors based on results of the units sent for testing.

And that longer start time might also come from a tired starter or cables getting some corrosion in them.
 
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Old Jan 20, 2022 | 08:56 AM
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We have a rule of thumb. If customer is going through the effort of pulling injectors to have tested, they likely won't have good test results.
 
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Old Jan 20, 2022 | 02:07 PM
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I have a rule of thumb too.
Don't pull injectors just for external o-rings.
 
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Old Jan 20, 2022 | 07:43 PM
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I wouldn’t mess with them if the truck is running fine unless you are looking for an excuse to upgrade. I am north of 300k and mine runs very well and I have no concerns about their health.
 
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Old Jan 20, 2022 | 10:33 PM
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From: Norcal
Thank for the advice.
 
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