97 ranger 2.3
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Welcome to FTE.
Lots of unknowns, so Scan for trouble code clues & post All code Numbers as they can help focus a trouble-shoot. If you don't know how, or don't have a code reader, or scan-tool, or don't know someone with one, most auto parts stores will do it at no charge if the CEL = Check Engine Light is on steady. Some won't scan unless it is lit.
It's possible the problem hasn't happened often, or long enough for the ECM to have been aggravated enough to turn the CEL on yet but Pending codes that haven't matured enough to turn the CEL on can still be stored in the ECM & are helpful to know, so go with a store that'll scan & give you All code numbers even without the CEL being lit, if you have to go that way.
A bunch of beginning thoughts for consideration, let us know what you find.
Lots of unknowns, so Scan for trouble code clues & post All code Numbers as they can help focus a trouble-shoot. If you don't know how, or don't have a code reader, or scan-tool, or don't know someone with one, most auto parts stores will do it at no charge if the CEL = Check Engine Light is on steady. Some won't scan unless it is lit.
It's possible the problem hasn't happened often, or long enough for the ECM to have been aggravated enough to turn the CEL on yet but Pending codes that haven't matured enough to turn the CEL on can still be stored in the ECM & are helpful to know, so go with a store that'll scan & give you All code numbers even without the CEL being lit, if you have to go that way.
A bunch of beginning thoughts for consideration, let us know what you find.
More Turbo
Joined: Oct 2023
Posts: 607
Likes: 153
From: Canada
Open loop is one set of parameters the vehicle runs off of for start up. Referencing a set of commands. Closed loop is when the system is referencing a set of inputs from all of the sensors. Open loop also occurs when a sensor fault occurs.
Fleet Mechanic
Joined: Dec 2003
Posts: 1,436
Likes: 117
From: Virginia
When you say "noise from the exhaust":
Is it the back of the truck, middle, front?
Is the noise inside the exhaust or outside?
The running rough or high idle might be related & it might not. As pawpaw said, start with any codes in the system.
As for the exhaust noise, the most common issues come from lose heat shields on the converter(s) or heat shields under the body/bed.
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