Post by phewop118 on Nov 6, 2018 21:20:41 GMT -6
My 02 3.5 seems to feel significantly weaker off the line and throughout the lower part of the rev band than it used to. It still feels fine above 4k RPM, but anywhere else, it seems to struggle to get up and going. Transmission is shifting fine. Off the line, it doesn't want to spin tires. At highway speed, I almost always need a downshift now to accelerate. No DTC's or misfires.
This did seems to occur after a CKP sensor replacement, but not directly after. I'm wondering if the new sensor has an issue or if the relearn was ineffective. Or perhaps its a fuel/air/spark issue?? I'm planning to replace the plugs (96k miles, I think they are original, but they don't look too bad), but should I replace MAF as well? It does tend to pull long term fuel trim back pretty hard (-10-11% during mild acceleration). My only reference point for LTFT is my 01 Intrigue which has over 200k miles, but it stays within a few % of 0.
Suggestions?
This did seems to occur after a CKP sensor replacement, but not directly after. I'm wondering if the new sensor has an issue or if the relearn was ineffective. Or perhaps its a fuel/air/spark issue?? I'm planning to replace the plugs (96k miles, I think they are original, but they don't look too bad), but should I replace MAF as well? It does tend to pull long term fuel trim back pretty hard (-10-11% during mild acceleration). My only reference point for LTFT is my 01 Intrigue which has over 200k miles, but it stays within a few % of 0.
Suggestions?
