intermittent rough idle
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intermittent rough idle
Hello all, I have a 2000 F-150 V8 4.6 triton. Sometimes when I start the truck It will idle rough, causing the truck to shake. I turn the truck off and immediately start it back up and it runs fine. Wondering if anyone else has experienced this or have any ideas as to whats causing this. Thanks
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Joined: Sep 2006
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1. Could be the intake air controller is stuck closed after the last time the truck was used and cooled down. Clean it.
2. Flooded from leaking injectors. Restart cleans it out. Check for leaking injectors.
3. Could be the cold start sequence is faulty with a bad cylinder head temperature sensor, faulty air temperature sensor. Check these on a cold engine before starting using a Scanner.
4. Vacuum leak that has shifted the fuel tables rich. Check with a Scanner to verify this.
5. Low fuel pressure. Gauge check this.
You have to check out each of these area.
It's not just a simple system but a sequence that involves sensors and program actions over a short time interval of several minutes until the Ox sensors take over fuel control.
2. Flooded from leaking injectors. Restart cleans it out. Check for leaking injectors.
3. Could be the cold start sequence is faulty with a bad cylinder head temperature sensor, faulty air temperature sensor. Check these on a cold engine before starting using a Scanner.
4. Vacuum leak that has shifted the fuel tables rich. Check with a Scanner to verify this.
5. Low fuel pressure. Gauge check this.
You have to check out each of these area.
It's not just a simple system but a sequence that involves sensors and program actions over a short time interval of several minutes until the Ox sensors take over fuel control.
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