I've got a new set of problems on my Wrangler. Back story on this, I bought it a couple of months ago, have been driving it issue-free until last night. It's the 4 cylinder with a manual transmission.
Last night, the Jeep fired right up, and I started heading down the road. All of a sudden it felt like a huge breeze hit and I started losing power. I thought 'must be a Jeep thing and a windy night', but it only got worse. I was almost to my destination, so I limped it there limited on power. It felt like I was towing a trailer uphill, and was being held back. When waiting to turn left, it stalled and I had to restart it and give it some gas to get moving.
I thought my fuel pump might be going bad.
This morning, I started the Jeep and it fired right up like it always had...weird. I started driving and it felt normal again, and I got a mile or so down the road until it started happening again. This time I noticed that none of the problems happened until the coolant temp needled moved from the cold resting position. I realize the 4 cylinder is pretty underpowered, but this is worse than normal!
Now I believe it's sensor-related. Could also be fuel-related, but it seems pretty odd that as soon as it acted up the needle had just moved.
I tried to order the coolant temp sensor on the intake manifold a few weeks back, but I ended up getting one with the wrong connector on it. If anyone thinks that's the problem, does anyone have the part number (again, 4 cylinder manual trans)?
I work at an auto parts store and will rent the fuel pressure tester just to rule fuel out, and since buying the Jeep I've replaced plugs/wires/cap/rotor, so those should all be good. Even after getting it home today, the engine sounded healthy at idle and had normal throttle response when stationary. Seems like it's only happening with a load under it.
For reference, ambient temps have been high 30's-low 40's last night and today, so I don't think I'm experiencing vapor-lock.
Help! the snow is coming and I want to be ready