This is on a 98 Lexus GS400. As I have mentioned in another post, this started happening after a gas fill up at a shell station. It actually went away for about a week but started happening again this past Friday. I've been through 2 new tanks of gas since then and all were from chevron.
Difference is now the shaking is a lot worse. Doesn't seem to happen right when the car is started up but after its warmed up (~15 minutes). No CEL is being thrown and tachometer stays steady throughout the shaking. Shaking is on and off fashion where it'll shake for about 2-3 seconds and stop and then repeats. Sometimes the shake is harder than others and almost feels like it's going to stall.
I don't know if getting a scan done at autozone or kragen is going to give me anything since the CEL is not coming on. I've already tried cleaning the throttle body and MAF sensor like other lexus owners have suggested but it didn't help. Other common problems seem to be bad MAF or throttle position sensors. Someone mentioned misfires and I looked into the symptoms and seems like that's what I'm experiencing. I'm going to do the simple "disconnect plug wire one after another" method to see if that's the problem. Anything else I should look for while I'm in there?
Difference is now the shaking is a lot worse. Doesn't seem to happen right when the car is started up but after its warmed up (~15 minutes). No CEL is being thrown and tachometer stays steady throughout the shaking. Shaking is on and off fashion where it'll shake for about 2-3 seconds and stop and then repeats. Sometimes the shake is harder than others and almost feels like it's going to stall.
I don't know if getting a scan done at autozone or kragen is going to give me anything since the CEL is not coming on. I've already tried cleaning the throttle body and MAF sensor like other lexus owners have suggested but it didn't help. Other common problems seem to be bad MAF or throttle position sensors. Someone mentioned misfires and I looked into the symptoms and seems like that's what I'm experiencing. I'm going to do the simple "disconnect plug wire one after another" method to see if that's the problem. Anything else I should look for while I'm in there?
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