Occasional friction groan
#21
Join Date: Oct 2009
Location: Perth Ontario Canada
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Hey guys I've got a post dealer inspection update. The mechanic said that they rarely get TQ problems on my year make & model. He says it's more likely to be an issue with the ignition coils. He said 3 are easy to access and the other three are in the intake manifold which take a bit of effort to get to. I found a video on YouTube that walks through the steps to get to the ones in the intake manifold but it didn't seem clear where the other ones are located. Could anyone point me in the right direction?
#22
My vehicle is hunting. I thought it was being caused by the TQ. The dealer mechanic believes it's a coil issue. The hunting is more likely to start after a turn at speed. I don't know if something's loose or just needs to be changed.
I've got a rear wheel squeak that started when a bearing was changed. I was unsure if it was brake related or not. I'm starting to feel like it's something to do with the bearing. Still haven't figured it out.
I started recently getting an airbag/seatbelt light saying that the seatbelt is unplugged. I don't know what triggers it because sometimes it happens and sometimes it doesn't. It didn't happen at all yesterday but two days ago it did. I drove to the grocery store and it was beeping the whole trip there but when I got out of the store the problem was nonexistent. I can live with it for short rides but when I'm driving 45 minutes and it's beeping 4 times every couple of minutes it gets irritating.
#23
Hunting may well be an air leak so watch fuel trims / smoke test. With all the posts on here about IMT valves you have presumably already changed the seals...
Seatbelt may well be the switch - just check / replace. Probably cheaper than OE diagnostic machine but go that way if you prefer.
Competent mechanics can diagnose bearings.
Seatbelt may well be the switch - just check / replace. Probably cheaper than OE diagnostic machine but go that way if you prefer.
Competent mechanics can diagnose bearings.
#24
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Location: Perth Ontario Canada
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If it's the engine RPM rising/falling and happens only during engine warm up, I provided a link above to the most common cause. There's a Jag bulletin that addresses this in detail.
As your mechanic mentioned the torque converters (abbreviated 'TC', not 'TQ') in your year and newer are problem free. The engine coil theory does not fit the description of the fault.
#25
What does 'My vehicle is hunting' mean specifically? The engine RPM rises/falls? The transmission shifts up and down a gear? The car wanders across the road as though on ice?
If it's the engine RPM rising/falling and happens only during engine warm up, I provided a link above to the most common cause. There's a Jag bulletin that addresses this in detail.
As your mechanic mentioned the torque converters (abbreviated 'TC', not 'TQ') in your year and newer are problem free. The engine coil theory does not fit the description of the fault.
If it's the engine RPM rising/falling and happens only during engine warm up, I provided a link above to the most common cause. There's a Jag bulletin that addresses this in detail.
As your mechanic mentioned the torque converters (abbreviated 'TC', not 'TQ') in your year and newer are problem free. The engine coil theory does not fit the description of the fault.
By hunting I mean the rpm's fluctuate 125-250rpm. This is typically at the beginning of a trip and seems to only happen at speeds under 100km. I've noticed that it'll be fine but if I take a turn quickly (at more than 20km/h) it'll begin immediately after. It seems to be caused more from higher speed turns than the engine being cold but I wouldn't be surprised if it was caused by both/either condition.
I've checked the lines for vacuum leaks but found none. I haven't done anything with the seals yet.
I don't know why the jag tech would suggest an issue with the coil if it doesn't usually cause the rpm fluctuation. He was an older British guy who seemed to know his stuff so I figured he'd know a thing or two.
Last edited by NoLagInTheJag; 08-29-2015 at 03:46 PM.
#26
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