jtkratzer
NAXJA Forum User
- Location
- Lancaster County, PA
I'm getting a rough idle, noticeable decrease in power, and a very rough ride and sound. CEL is on.
To start off, this issue has been sporadic and strange. It used to happen only when the rain was extremely heavy and the vehicle sat outside in it or when I was driving through heavy rain and deeper water and the water splashed heavily into the undercarriage.
In the past, it would do this for maybe 15-20 minutes and then stop and the light would go off before I had a chance to get the codes pulled.
Today was the anomaly. It did this during a hot, dry day and we haven't had rain in several days. Last time I drove it, no problem, for several days.
I stop at a Pep Boys (it was close to where I was at the time to get the codes pulled). Codes are P0300 and P0301. I know those are random misfires and misfires on cylinder one.
1996 XJ, 4.0, 5 speed, 230,000 miles. Stock except for a replacement K&N air filter.
I changed the crankshaft position sensor today, what a PITA that was to get to. Not only that, I paid for the one that came up for the 1996 model and got home and the plugs are different. Ended up matching the 1997 sensor although it was a bit short and had to zip tie it so it wasn't laying on the intake manifold.
I'll pull the plugs tomorrow and check them and the wires, but the plugs and wires are only about 40,000 miles old. Rotor button and distributor cap were changed about 8,000 miles ago. Oil change yesterday. It has no problems starting whatsoever. I've read about the heat soak issue on others and those "symptoms" aren't the same. I'm going to check for moisture in the distributor cap as well and see how the contacts look inside. It doesn't seem to be a fuel delivery issue, although I haven't measured the pressure from the fuel pump or checked the injectors. I say it doesn't sound like the fuel because it's perfectly fine almost every other time I drive it.
Any thoughts or other suggestions?
To start off, this issue has been sporadic and strange. It used to happen only when the rain was extremely heavy and the vehicle sat outside in it or when I was driving through heavy rain and deeper water and the water splashed heavily into the undercarriage.
In the past, it would do this for maybe 15-20 minutes and then stop and the light would go off before I had a chance to get the codes pulled.
Today was the anomaly. It did this during a hot, dry day and we haven't had rain in several days. Last time I drove it, no problem, for several days.
I stop at a Pep Boys (it was close to where I was at the time to get the codes pulled). Codes are P0300 and P0301. I know those are random misfires and misfires on cylinder one.
1996 XJ, 4.0, 5 speed, 230,000 miles. Stock except for a replacement K&N air filter.
I changed the crankshaft position sensor today, what a PITA that was to get to. Not only that, I paid for the one that came up for the 1996 model and got home and the plugs are different. Ended up matching the 1997 sensor although it was a bit short and had to zip tie it so it wasn't laying on the intake manifold.
I'll pull the plugs tomorrow and check them and the wires, but the plugs and wires are only about 40,000 miles old. Rotor button and distributor cap were changed about 8,000 miles ago. Oil change yesterday. It has no problems starting whatsoever. I've read about the heat soak issue on others and those "symptoms" aren't the same. I'm going to check for moisture in the distributor cap as well and see how the contacts look inside. It doesn't seem to be a fuel delivery issue, although I haven't measured the pressure from the fuel pump or checked the injectors. I say it doesn't sound like the fuel because it's perfectly fine almost every other time I drive it.
Any thoughts or other suggestions?