nwro
Junior Member
Got some issues with my truck as mentioned in the title.
Apologies for the long post and hope the wording makes sense. Wanted to try to provide as much detail as possible.
Some history on the truck:
2013, 5.7, 6 speed, 106K miles
Bought at 100K miles. 1 owner truck but limited maintenance history.
Oil and filter change to redline 5W20 at 101k miles
Oil and filter to redline 5w30 at 105K miles
Some lifter noise present which reduced after first oil change to redline at 101k miles. Didn’t completely go away.
Over the last weeks noticed higher fuel consumption and truck seemed to struggle a bit with down shifts. Meaning at lower speeds (30 – 50 mph) and lower RPM’s it seems to just put load on the engine and then after continuing to slowly press the pedal suddenly drop 2 gears instead of just one. Fuel consumption seemed to be higher than normal, especially while on cruise. While on cruise it feels like its putting load on the engine making it feel like the engine is “pulling” almost continuously.
Down shifts at highway speeds seem to be fine.
When trying to keep constant speed by just using the pedal the engine “loading” seemed a lot less and fuel consumption appears to be better according to evic display.
Because of the above symptoms decided to do oil change (redline 5w30), replace the sparkplugs, clean the throttle body and recalibrate TPM at 105K miles. Drove about 800 miles since and initially the situation appeared to be better.
Over the weekend engine light came on. Since we where away from home I wasn’t able to read the codes. Decided to just drive it home (120 mile trip) and monitor the situation.
Engine idles fine and the lifter noise seemed to have gotten a lot less. At highway speeds (around 1800rpm) the engine felt like its loading more compared to before. Up to the level that the drive was feeling a little “jerky”.
Now also when not using cruise.
Below approx. 2200 rpm acceleration is a little sluggish. Above this, acceleration feels fine and upshifts are good. Downshifts are still erratic. Especially at lower rpms and lower speeds.
After passing toll gate accelerated swiftly up to around 80mph (half throttle, pushing shifts at higher rpm) and a strong vibration developed. Slowed down a bit to around 65 mph and vibration became less. Manually selected lower gear and vibration noticeably got less at higher rpm. Continued driving and initially locked gear at 5th driving 70mph forcing to operate in higher rpm range (2200 rpm). After a while shifted to 6th without noticeable changes in engine performance (little vibration).
Getting close to home I gradually increased speed up to 80mph and seemed to drive fine. No vibration and also the “engine loading” under steady throttle seemed to be less.
This evening I’ll swap sparkplug and coil of number 5 cylinder with another one to see if the code will change to that cylinder or remain at no 5.
Any thoughts or suggestions?
Apologies for the long post and hope the wording makes sense. Wanted to try to provide as much detail as possible.
Some history on the truck:
2013, 5.7, 6 speed, 106K miles
Bought at 100K miles. 1 owner truck but limited maintenance history.
Oil and filter change to redline 5W20 at 101k miles
Oil and filter to redline 5w30 at 105K miles
Some lifter noise present which reduced after first oil change to redline at 101k miles. Didn’t completely go away.
Over the last weeks noticed higher fuel consumption and truck seemed to struggle a bit with down shifts. Meaning at lower speeds (30 – 50 mph) and lower RPM’s it seems to just put load on the engine and then after continuing to slowly press the pedal suddenly drop 2 gears instead of just one. Fuel consumption seemed to be higher than normal, especially while on cruise. While on cruise it feels like its putting load on the engine making it feel like the engine is “pulling” almost continuously.
Down shifts at highway speeds seem to be fine.
When trying to keep constant speed by just using the pedal the engine “loading” seemed a lot less and fuel consumption appears to be better according to evic display.
Because of the above symptoms decided to do oil change (redline 5w30), replace the sparkplugs, clean the throttle body and recalibrate TPM at 105K miles. Drove about 800 miles since and initially the situation appeared to be better.
Over the weekend engine light came on. Since we where away from home I wasn’t able to read the codes. Decided to just drive it home (120 mile trip) and monitor the situation.
Engine idles fine and the lifter noise seemed to have gotten a lot less. At highway speeds (around 1800rpm) the engine felt like its loading more compared to before. Up to the level that the drive was feeling a little “jerky”.
Now also when not using cruise.
Below approx. 2200 rpm acceleration is a little sluggish. Above this, acceleration feels fine and upshifts are good. Downshifts are still erratic. Especially at lower rpms and lower speeds.
After passing toll gate accelerated swiftly up to around 80mph (half throttle, pushing shifts at higher rpm) and a strong vibration developed. Slowed down a bit to around 65 mph and vibration became less. Manually selected lower gear and vibration noticeably got less at higher rpm. Continued driving and initially locked gear at 5th driving 70mph forcing to operate in higher rpm range (2200 rpm). After a while shifted to 6th without noticeable changes in engine performance (little vibration).
Getting close to home I gradually increased speed up to 80mph and seemed to drive fine. No vibration and also the “engine loading” under steady throttle seemed to be less.
This evening I’ll swap sparkplug and coil of number 5 cylinder with another one to see if the code will change to that cylinder or remain at no 5.
Any thoughts or suggestions?
