Just picked up a used 2005 LS430 yesterday I love the car but I went to pass somebody and it down shifted but wouldn't up shift or rev past 4000 rpm it just stayed in gear and wouldn't up shift until I let off the gas pedal car runs fine and has no check engine light has 90k miles on it I'm so confused its like somebody set the rev limiter at 4000 rpm anybody know what I should start checking or anybody ever heard of this? Thanks for any info

 

This is going to be interesting, I don't know what your problem is, but let us know how this turns out.

Does anybody know how the vvt works on these? i think its different than on hondas, but doesn't this problem sound like something to do this this type of system

 

wait, is this a CPO car? do you have an extended service plan? does your state have a lemon law? in my state the lemon law is only for 48 hours so act quickly

 

Obvious - but make sure that the drive shifter is in D and not in another gear - look at the dash and make sure.

Jimbo

 

I'm starting to think that my catalytic converters might be plugged car runs great as long as your not on the gas to hard, I keep on hoping that a check engine light comes on so i can read the code but hasn't and I've put about 200 miles on it. thanks for the help guys I'll keep you updated

 

Did it do it when you test drove it? Make sure the shifter is all the way to the passenger/right side.

 

Sorry shifter position should not make a difference.

 

http://www.youtube.com/watch?v=MOi6twYhmbM

 

That video is with the throttle floored

 

it appears to me your car revs slower than mine. i have an 05 as well

 

hmm possibly plugged cats, hows the air filter?

 

been at the dealer for 2 days still can't find the problem.

 

You might want to try cleaning the MAF with CRC or similar MAF cleaner. I changed plugs, TPS, and cleaned throttle body before doing so without success in fixing the REV problem that you describe. Cleaned the MAF and noticed an immediate improvement, but still had a slight stumble in acceleration. Drove it this way for about a year (wife actually drove it because I was deployed) and just replaced MAF today. There is absolutely no hesitation now. Thinking about going to the dragstrip. J/K. I also removed my K&N as it appeared that the oil from the filter may have been affecting the MAF.

Replaced the MAF with a Beck Arnley 158-0777 from Amazon that cost $82.84 (w/ $3.99 for next day shipping). So far so good. Considered purchasing a Denso 197-6030 ($82.94 Amazon) and the OEM 2220422010 ($129.35 Sewell). We'll see how it works out.