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Old 11-08-2019, 08:02 PM   #1
Anatorian
 
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Default Injector?

Take a listen to this clanging sound. Almost exactly the same sound as our Cat truck had when an injector went bad.

No CEL
No change in fuel economy
Rough at idle warm or cold
Smooth(er) when RPM increase or under load.
No noticeable smoke


https://youtu.be/kOCIGg-DN4w
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Old 11-08-2019, 08:46 PM   #2
Midwestdrifter
 
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Default Re: Injector?

Rough idle definitely points to a failing injector. A factory level scanner can check the injectors trim values to see which cylinder is the likely culprit.

What year is this van? 02-03 models can get air in the fuel lines which can cause rough idle.

Driving the van with a bad injector can cause damage, you have been warned.
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Old 11-08-2019, 09:36 PM   #3
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Default Re: Injector?

Any chance the issue could also be related to a bad EGR?
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Old 11-08-2019, 10:03 PM   #4
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Default Re: Injector?

Quote:
Originally Posted by Zundfolge View Post
Any chance the issue could also be related to a bad EGR?
Its possible. EGR issues would clear up with a throttle application, as the EGR closes during transient conditions. If the noise clears up with the EGR disconnected, that is an indicator. At least for intermittent issues like the one described. For stalling or continuous rough idle, a stuck EGR would not respond to a disconnect.

Note that EGR issues will tend to cause black smoke, so I am still leaning towards injector.
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