ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 247
- Messages
- 40,440
- Reaction score
- 53,853
- Location
- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
- Vehicle Showcase
- 3
No, it senses the knock before you can even hear it and adjusts the timing and mixture as needed. It doesn't "reduce power".My 2022 Mojave has had an itermittent spark knock from new. Very short duration until recently. Over the past month (doors off, so it could have been happening a bit longer) the spark knock duration has gotten longer, always hot, always a slow accelleration often during an upshift (automatic). Yesterday I could feel a power drop while going uphill which stopped the knock. Am I correct in assuming the engine sensed the knock and reduced power? It didn't throw a code.
I'm trying to gather as much information as possible and/or fix myself because the dealer will say this is normal.
Did it shift during that time? that may be what you felt. You will not feel the subtle adjustments the PCM makes to stop detonation.
Do you baby it? Do you keep a light foot on the pedal instead of giving it the throttle needed to make the hill? The fact that it upshifted going up a hill makes me ask.
TRUE detonation is RARE in these. They have sensors that know when it happens before you do. Most of what people here are ordinary engine sounds or rattles from shields, exhaust and so on.
(I have no idea why people call it spark knock as it has zip to do with a spark. Must be some magazine writer or marketing company made that one up)
Sponsored