Hello all,
We'll I've had my '06 LJ for about 2 weeks now. I've put about 1000 miles on it so far and am catching up on some neglected maintenance from the PO.
It's currently got 52K miles. This last week I changed the oil, set tire pressures, greased the front-end etc.
I was getting some stumble at idle and a pretty good ping under load at higher RPM (such as pulling out onto the freeway).
I pulled the plugs, and am fairly certain they were original. The gap measured at between .045 and .060. I put some Auto-lite platinum plugs. And dumped a bottle of STP fuel injector cleaner in the tank.
This cured a lot of the idle stumble and most of the heavy load ping, but it's still happening.
In addition, yesterday after heavy traffic and the heat, I was sitting at stop light, and it felt like there was a bad mis on 1 or more cylinders. I revved it and the issue cleared, though it was still a bit shaky. It was then fine the rest of the way home, but I was no longer sitting in one spot, with no airflow through the engine compartment. No check engine light was triggered.
I'm also getting that weird 2000 rpm dead spot, mostly noticeable the 2-3 shift which I've seen other people report on.
Since plugs didn't cure the situation, I feel the next weak spot in the system in the Coil Rail, again going on what I've been reading on here from a number of searches. It seems like spark is breaking down when things get really hot and under high demand.
Anyone have any other suggestions?
Thanks,
Jason
We'll I've had my '06 LJ for about 2 weeks now. I've put about 1000 miles on it so far and am catching up on some neglected maintenance from the PO.
It's currently got 52K miles. This last week I changed the oil, set tire pressures, greased the front-end etc.
I was getting some stumble at idle and a pretty good ping under load at higher RPM (such as pulling out onto the freeway).
I pulled the plugs, and am fairly certain they were original. The gap measured at between .045 and .060. I put some Auto-lite platinum plugs. And dumped a bottle of STP fuel injector cleaner in the tank.
This cured a lot of the idle stumble and most of the heavy load ping, but it's still happening.
In addition, yesterday after heavy traffic and the heat, I was sitting at stop light, and it felt like there was a bad mis on 1 or more cylinders. I revved it and the issue cleared, though it was still a bit shaky. It was then fine the rest of the way home, but I was no longer sitting in one spot, with no airflow through the engine compartment. No check engine light was triggered.
I'm also getting that weird 2000 rpm dead spot, mostly noticeable the 2-3 shift which I've seen other people report on.
Since plugs didn't cure the situation, I feel the next weak spot in the system in the Coil Rail, again going on what I've been reading on here from a number of searches. It seems like spark is breaking down when things get really hot and under high demand.
Anyone have any other suggestions?
Thanks,
Jason