2005 LS430 A/C and Jerking Issues
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Driver School Candidate
Joined: Jul 2019
Posts: 3
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From: Texas
2005 LS430 A/C and Jerking Issues
2005 LS430
97,000 miles
New to me (3rd Owner)
Wanted to give back to the forum by posting my saga. Got the car back from an indy shop after having the timing belt and water pump changed.
A/C Problem:
A few weeks later I started having problems with the A/C. It would start out cooling fine, then it would get hot a little while later it would start cooling again. I also noticed that if I put it on the setting where it took in the outside air (97F) it would start cooling again. In trouble shooting this, I had the system purged, flushed and properly charged because I knew that the system had been open due for a while before I got the car due to a rock through the condenser. I also knew that the person who worked had the person working on the A/C before didn't own a vacuum pump and didn't think they were needed.
This did not fix the problem. About that time I noticed there was some coolant leaking. When I saw the coolant it was an aha moment because there is another thread on this board that says if your coolant is low, it will affect your A/C. (This turned out to be the problem with the A/C). Check your coolant levels first if your A/C is not working.
Coolant Leak:
In looking for the leak I discovered that the radiator was leaking and the new water pump was leaking.
Took the car back to the indy shop to redo the previous work turns out one of the o-rings split (that is what I was told) and that was the source of the leak. They replaced all the parts water pump, timing belt, idlers, etc. because they got coolant on them. They replaced the radiator for the cost of the part since they had to do the other work again. Put an new radiator cap on it too.
No more problems with A/C!
Car Jerking:
A few days later I would notice the car would jerk like the transmission was shifting hard while cruising around 50-70. Sometimes it would do it under acceleration but, most of the time it was random. I would also see the tach jump up a few hundred RPM's. From this, I started wondering if they lost too much transmission fluid when they changed the radiator. Since I had planned to have the fluid replaced in the coming year, I took it to the dealership so they could flush it too. Told them the problem I was experiencing. They ran their diagnostic and took it for a test drive. The mechanic said he felt the jerk but, though that was normal. They pronounced the car good. Since teh diagnostic feed would apply toward a repair, I had them flush and replace the fluid anyway.
Drove the car back to work. and parked it. It didn't jerk once on the way. When I started the car to go home it tripped the check engine light, the VSC indicator and logged a P1340 code. Got back on these boards and found a couple of threads that talked about this and that the P1340 code is not cylinder 8 misfiring. Anyway took the car back to the indy shop.
At the indy shop they cleared the code swapped the coil for cylinder 8 with cylinder 7 and we took it for a test drive. They car jerked again but, no code was thrown. The mechanic asked me why I thought it was the camshaft position sensor instead of cylinder 8. Told them about my research and this board. Here are the links.
https://www.clublexus.com/forums/ls-...ode-p1340.html
https://www.clublexus.com/forums/ls-...nsor-help.html
https://www.clublexus.com/forums/ls-...nsor-wire.html
Cutting to the chase when the mechanic starting looking around the camshaft cover by cylinder 1, he saw where the camshaft position indicator cable had gotten down on the serpentine belt. The insulation had worn through and the outer metal shield would make and break contact randomly. They repaired the wire and the problem has gone away.
Thanks to all who have contributed on this board. You have saved me a lot of grief. Trying to keep this ride on the road for the next 5 years. Every time I buy a car I say this is my second to last one, the next one will be self driving.
97,000 miles
New to me (3rd Owner)
Wanted to give back to the forum by posting my saga. Got the car back from an indy shop after having the timing belt and water pump changed.
A/C Problem:
A few weeks later I started having problems with the A/C. It would start out cooling fine, then it would get hot a little while later it would start cooling again. I also noticed that if I put it on the setting where it took in the outside air (97F) it would start cooling again. In trouble shooting this, I had the system purged, flushed and properly charged because I knew that the system had been open due for a while before I got the car due to a rock through the condenser. I also knew that the person who worked had the person working on the A/C before didn't own a vacuum pump and didn't think they were needed.
This did not fix the problem. About that time I noticed there was some coolant leaking. When I saw the coolant it was an aha moment because there is another thread on this board that says if your coolant is low, it will affect your A/C. (This turned out to be the problem with the A/C). Check your coolant levels first if your A/C is not working.
Coolant Leak:
In looking for the leak I discovered that the radiator was leaking and the new water pump was leaking.
Took the car back to the indy shop to redo the previous work turns out one of the o-rings split (that is what I was told) and that was the source of the leak. They replaced all the parts water pump, timing belt, idlers, etc. because they got coolant on them. They replaced the radiator for the cost of the part since they had to do the other work again. Put an new radiator cap on it too.
No more problems with A/C!
Car Jerking:
A few days later I would notice the car would jerk like the transmission was shifting hard while cruising around 50-70. Sometimes it would do it under acceleration but, most of the time it was random. I would also see the tach jump up a few hundred RPM's. From this, I started wondering if they lost too much transmission fluid when they changed the radiator. Since I had planned to have the fluid replaced in the coming year, I took it to the dealership so they could flush it too. Told them the problem I was experiencing. They ran their diagnostic and took it for a test drive. The mechanic said he felt the jerk but, though that was normal. They pronounced the car good. Since teh diagnostic feed would apply toward a repair, I had them flush and replace the fluid anyway.
Drove the car back to work. and parked it. It didn't jerk once on the way. When I started the car to go home it tripped the check engine light, the VSC indicator and logged a P1340 code. Got back on these boards and found a couple of threads that talked about this and that the P1340 code is not cylinder 8 misfiring. Anyway took the car back to the indy shop.
At the indy shop they cleared the code swapped the coil for cylinder 8 with cylinder 7 and we took it for a test drive. They car jerked again but, no code was thrown. The mechanic asked me why I thought it was the camshaft position sensor instead of cylinder 8. Told them about my research and this board. Here are the links.
https://www.clublexus.com/forums/ls-...ode-p1340.html
https://www.clublexus.com/forums/ls-...nsor-help.html
https://www.clublexus.com/forums/ls-...nsor-wire.html
Cutting to the chase when the mechanic starting looking around the camshaft cover by cylinder 1, he saw where the camshaft position indicator cable had gotten down on the serpentine belt. The insulation had worn through and the outer metal shield would make and break contact randomly. They repaired the wire and the problem has gone away.
Thanks to all who have contributed on this board. You have saved me a lot of grief. Trying to keep this ride on the road for the next 5 years. Every time I buy a car I say this is my second to last one, the next one will be self driving.
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