Idle RPM
#16
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I had the same problem until I took out my EFI Fuse for about 20 minutes that's the # 38 Fuse, Since then (4 months) I have not had the problem, Try it then post your results. I dont know why that worked It just did.
#17
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I finally argued with my service rep at the dealership and got her to replace the TPS unit. Im driving a loaner car from them right now and will post the results of this repair. I hope you guys are right about the throttle position sensor being the culprit. She was not to happy with replacing it under warrantee stating she could get in trouble with head quarters because the part was not defective.
I will post tonight if it worked on fixing the rough idleling problem and we will put this issue to rest and help alot of Club lexus GS 400 owners if it works.
Tony
I will post tonight if it worked on fixing the rough idleling problem and we will put this issue to rest and help alot of Club lexus GS 400 owners if it works.
Tony
#18
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Thanks Navaz I will try to pull that fuse tonight when I get the car back from the dealer. Ill post before and after the fuse and with the new TPS unit replaced.
Tony
Tony
#20
Lexus Test Driver
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Originally posted by Tony
I finally argued with my service rep at the dealership and got her to replace the TPS unit. Im driving a loaner car from them right now and will post the results of this repair. I hope you guys are right about the throttle position sensor being the culprit. She was not to happy with replacing it under warrantee stating she could get in trouble with head quarters because the part was not defective.
I will post tonight if it worked on fixing the rough idleling problem and we will put this issue to rest and help alot of Club lexus GS 400 owners if it works.
Tony
I finally argued with my service rep at the dealership and got her to replace the TPS unit. Im driving a loaner car from them right now and will post the results of this repair. I hope you guys are right about the throttle position sensor being the culprit. She was not to happy with replacing it under warrantee stating she could get in trouble with head quarters because the part was not defective.
I will post tonight if it worked on fixing the rough idleling problem and we will put this issue to rest and help alot of Club lexus GS 400 owners if it works.
Tony
Let us know what happened after the TPS replacement. It may be a while before you really see if the problem will come back.
#22
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By the way the new idling rpm is 600-625 with the gear in drive and no AC. Absolutely no shaking. It makes me want to drive the car again and again to test it. I have a new love for my car again.
I have not tried pulling the #39 fuse like someone suggested if you guys tried that and it fixes the ideling problems to let me know. Mine is working so good I dont want to mess with it. So please post your results for everyone to see. I can sure vouch for the TPS being replaced.
Mystry is solved good luck guys.
Tony
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#23
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Glad your problem was fixed, you see I had that problem also, so that's why I said to change the TPS. I must have taken my car to the dealership about 7 times before they found the problem, atleast now others don't have to go through the fustration that I went through...
Aloha
Aloha
#24
Lexus Champion
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I've only experienced rough idle at cold start, and then, only when car is NOT in gear. I'd think that a rough idle would, at the least, be an emissions control issue. Would seem difficult to achieve LEV or ULEV status with rough idle. My SA also has mentioned it as common problem with the 4.3 L motor, but no TSB or recall to this point.
#25
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Thanks Itsallgood I remembered you saying you had to make multiple trips to the dealership so I wrote it down and referenced our forums. I think thats what made the SA get worried and replaced the TPS for me on the first visit.
Tony
Tony
#28
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Join Date: May 2001
Location: northern va
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well i had my tps replaced about 3 months ago. BUT just yesterday my car stalled again!!! so either they gave me a faulty part or.. who knows! i have a SRT intake now so im scared to bring it back to lexus. im SURE they will say.. well we fixed it before.. and now u have that intake so thats the problem.. EVEN though hte problem existed before i had the intake! any suggestions??? thanks!
T
T
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