cylinder 1 misfire

I bought a fuel pump from dead jeep a while back and after a few months I needed to prime the pump to get her to start. Figured the regulator was going out. Dropped the tank and replaced the regulator only. Also changed spark plugs they were showing discoloration on one side and had some bluing...

1998 Sahara TJ 4.0 5 Spd (215k miles) Hello all, I am attempting to chase down a bad misfire that randomly started around a week ago. I daily drive my TJ, change the oil every 3500 miles, and don't beat on it hard. It's very rough on idle, but appears to be fine when driving, other than being...

I had my engine rebuilt, complete bottom and top, but there is something wrong that I need a competent mechanic to disguise and possibly fit. I am getting a misfire on Cylinder 1 and it is not all time and the Check Engine Light for the same reason. All ignition parts are new except the...

Hello everyone, I have a 1998 Jeep Wrangler 4.0L, I have a check engine light on and it’s giving me the following codes: P0300- multiple/ random cylinder misfire P0301- cylinder 1 misfire P0302- cylinder 2 misfire Anyone know what my issue may be? Been trying to fix this on my days off from...

Having trouble nailing down the cause of my P0201 and P0301 codes in my 2004 with the 4.0. There is a lot of info below so please bear with me. Here is what I'm experiencing after battery disconnected and engine cold: Within 5 seconds of start up the P0201 code is thrown. Engine runs but has a...

Howdy y'all. I'm at my wits end (which is a short trip) and hope you might help. :rolleyes: I recently bought a 99 Jeep tj, high mileage, 6 cylinder and I've been patiently "fixing it up". One problem quickly eluded me and unfortunately seems to be eluding my mechanic (who is really pretty...