Help! Temporary Power Loss
I need some serious help with my 2014 Jeep Patriot.
It's a 2.4L, 5 Speed, Manual Transmission. And around 65,000 miles on it. And has all routine maintenance up to date.
The Jeep Patriot has been a great car for me but around 60,000 miles it started this thing where during acceleration it would lose power for a few seconds. It felt almost like slamming on the brakes and the RPMs would drop. But no check engines lights would come on or any other "alarm" lights. The loss of power would only last for about 3 seconds then it would drive like nothing happened and only happened in 4th gear.
I took my Jeep to the dealership and then told me the clutch was bad even though the RPMs dropped. So I had the clutch replaced. About 2 months went by and it started doing it again. The exact same symptoms. During acceleration it would temporary lose power and the RPMs would drop, no lights or anything would appear. Lasting only about 3 seconds the only difference was that it started doing it in different gears, 1st-4th.
I took it back to the dealership and they said there was nothing wrong with my Patriot. I took to another mechanic and he said it was probably the transmission/clutch but didn't want to look at. I took it to another mechanic and they ran a systems check on it and couldn't find anything wrong with it except when the dealership looked at it they didn't put all the bolts back in the transmission which caused a small rattle and transmission leak (pretty significant). But the clutch and transmission appeared fine. So I took it back to the dealership and made them fix it for free.
Anyways, the Patriot drove fine for a couple of weeks then it started doing it again, loss of power for about 3 seconds, RPMs drop, and random gears from 1st-4th.
So I started troubleshooting it, googling possible causes. Most indicated a code would be thrown but the few that said clogged fuel filter, bad throttle body, or needing a tire rotation. Well the fuel filter is in the pump, so I replaced the whole thing, which the Patriot drove better with but still kept having the issue. Next tire rotation and alignment. The rear tires were more worn than the front tires and the alignment was pretty good. And it didn't solve the problem. So I replaced the throttle body. That seemed to do the trick.
I drove the Patriot from southern CA to northern ID and the Patriot drove great for the first 6 hours of the drive but going downhill on cruise control it started the loss of power and RPM drops again. It didn't it off and on for about 45 minutes. It was the like 2am and no cellphone reception so we continued to drive it. Then it was like nothing happened. It drove completely fine for several more hours before doing it again. Again in cruise control. Then a couple of hours later on a flat stretch. Then again while accelerating. Then the last two hours of the drive, driving fine. Then while muddling through town after not driving for 2 days it did it while going over a bump, then a day later while going over another bump.
I took it to a mechanic that focuses on electrical issues. They couldn't find anything wrong with the Jeep. The only code it had stored was an implausible code (U0401). But they couldn't find anything and couldn't recreate the symptom and even had me drive it to try and create it and couldn't recreate it.
So I drove it back from northern ID back to southern CA. The only time it did it on the way back was going over rough road. And once when we pulled over at a camping site there was a slight decline I took it out of gear and rolled down the hill. It was wash boarded and did it while in neutral then died on me, but started back up without issue.
So, there it is. Temporary loss of power, drop in RPMs, for only about 3 seconds, happening in every gear now, happening both during acceleration/de-acceleration/holding a steady speed, doesn't matter what the terrain is, no check engine lights/"alarm lights", and I can't recreate the symptoms.
Any suggestions or advice on how to narrow it down to a possible cause would be greatly appreciated! Or if anyone has experienced this problem, I'd really like your input!