efjellanger
NAXJA Forum User
- Location
- Seattle
Hi all, this is the first thread I've posted here. I am a new owner of a 1998 XJ, with about 200k miles but a nearly new engine. It's been fun, and since it's a 22 year old vehicle, there's enough slightly wrong with it to keep me occupied.
It has experienced a high idle intermittently since I bought it. If I snap the accelerator briskly it'll settle down. This is my first XJ so I don't have any other comparison, I would say the idle seems just a little rough right now, but it might be normal.
I have taken the throttle body off a couple times, cleaned it, fiddled with the stop screw, then I replaced the gasket and eventually replaced the IAC valve and the housing gasket. None of these have really made the problem go away.
So finally in desperation I actually looked at the throttle while it was experiencing the high idle. The throttle actuator is not sitting on the stop screw. If I push on it, I can get it to seat down and it goes back to a normal idle. During this, all 3 cables (accel, cruise, TV) going to the actuator are loose.
So I can't tell why it's hanging, but it seems to be internal. What do I need to fix this? Clean it out again, better? Disassemble and sand it? A new throttle body?
Probably unrelated bonus problems: a few times I have had a low voltage at idle which resulted in a "Check gauges" light. Seemed more common with the headlights and fan on. I haven't seen it again since the first time I cleaned the TB. I also had a missing vacuum line going to the reservoir, I replaced that and the dash vents started working, which was great. The idle seemed to smooth a bit after that.
thanks in advance,
E
It has experienced a high idle intermittently since I bought it. If I snap the accelerator briskly it'll settle down. This is my first XJ so I don't have any other comparison, I would say the idle seems just a little rough right now, but it might be normal.
I have taken the throttle body off a couple times, cleaned it, fiddled with the stop screw, then I replaced the gasket and eventually replaced the IAC valve and the housing gasket. None of these have really made the problem go away.
So finally in desperation I actually looked at the throttle while it was experiencing the high idle. The throttle actuator is not sitting on the stop screw. If I push on it, I can get it to seat down and it goes back to a normal idle. During this, all 3 cables (accel, cruise, TV) going to the actuator are loose.
So I can't tell why it's hanging, but it seems to be internal. What do I need to fix this? Clean it out again, better? Disassemble and sand it? A new throttle body?
Probably unrelated bonus problems: a few times I have had a low voltage at idle which resulted in a "Check gauges" light. Seemed more common with the headlights and fan on. I haven't seen it again since the first time I cleaned the TB. I also had a missing vacuum line going to the reservoir, I replaced that and the dash vents started working, which was great. The idle seemed to smooth a bit after that.
thanks in advance,
E