New plugs, car jerking
#1
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New plugs, car jerking
I went to an independent shop with my 2008 GS350 AWD, and they changed my spark plugs and said they used iridium ones. That night I noticed my car jerking after I turned it on, I would see the RPMs jump slightly down for a split second and the car would shake. It would happen like every 10-20 seconds and stopped once I started driving. Would this be caused by improperly installed plugs?
For my 60k service I also got an oil change, new engine air filter, cabin air filter, balance and rotate tires, and they checked everything else on the list. They checked my brake fluid and said it was still clean and did not need to be drained and replaced. Is this something that needs to be done to keep your Certified Warranty?
Also, at my last oil change Lexus told me I needed a new drive belt since mine was cracked. This shop said they did not see anything wrong with it. They said it did not look dry and cracked at all. Is this something I should just have them do anyway or can it wait? I didn't use Lexus since they wanted over $900 for the service and the drive belt. It seemed like 90 percent of the maintenance was just checking stuff which this shop did for free.
Thank you!
For my 60k service I also got an oil change, new engine air filter, cabin air filter, balance and rotate tires, and they checked everything else on the list. They checked my brake fluid and said it was still clean and did not need to be drained and replaced. Is this something that needs to be done to keep your Certified Warranty?
Also, at my last oil change Lexus told me I needed a new drive belt since mine was cracked. This shop said they did not see anything wrong with it. They said it did not look dry and cracked at all. Is this something I should just have them do anyway or can it wait? I didn't use Lexus since they wanted over $900 for the service and the drive belt. It seemed like 90 percent of the maintenance was just checking stuff which this shop did for free.
Thank you!
#2
hey man I had the same problem with my Lexus Gs and the spark plugs. But my problem was that I got the spark plugs from auto zone instead of going to the Lexus Dealer or a special foreign auto parts store. And when I put those auto zone spark plugs in my car was jerking as well. But I would say maybe in your case someone didnt gap the plugs correctly when installing them. Those plugs have to be gapped correctly.
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#8
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I don't remember, I think they said one was loose, but I don't do any car maintenance myself, so he could have told me anything and I probably would have believed it.
#9
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hey man I had the same problem with my Lexus Gs and the spark plugs. But my problem was that I got the spark plugs from auto zone instead of going to the Lexus Dealer or a special foreign auto parts store. And when I put those auto zone spark plugs in my car was jerking as well. But I would say maybe in your case someone didnt gap the plugs correctly when installing them. Those plugs have to be gapped correctly.
As for autozone, that's where I bought my OEM iridium Denso plugs.
#11
Lexus Fanatic
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i still double check them anyway. even if they say that the plugs are pre-gapped, it only takes about a minute to check all of them. just a peace of mind thing.
#12
best practice is to recheck the gap before inserting, never know who dropped one or two from production, shipping, transport to installation.
Theres a tool that does this very well
Theres a tool that does this very well
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