2000 gs300 weird idle problem
08-03-14, 08:52 AM
#1
Driver
Thread Starter
2000 gs300 weird idle problem
ive tried to search the forum many times to avoid a redundant thread but i never had luck or am searching the forum wrong but my car has an issue and im not sure what it is. what it does is, when im driving the car will suddenly drop to idle and cost to where ever you want it to go, someone told me that it can be going into safe mode (whatever that means) someone else told me the car has an electronic idle as well as a manual idle and the motor for that can be going out and there does appear to be a motor on the throttle body facing me.. when the car is running like this the throttle doesn't work unless you floor it even then the tranny wont shift... if anyone can give me any info it would be greatly appreciated until then ill be poking at it... thanks early
08-03-14, 10:42 AM
#3
Advanced
ive tried to search the forum many times to avoid a redundant thread but i never had luck or am searching the forum wrong but my car has an issue and im not sure what it is. what it does is, when im driving the car will suddenly drop to idle and cost to where ever you want it to go, someone told me that it can be going into safe mode (whatever that means) someone else told me the car has an electronic idle as well as a manual idle and the motor for that can be going out and there does appear to be a motor on the throttle body facing me.. when the car is running like this the throttle doesn't work unless you floor it even then the tranny wont shift... if anyone can give me any info it would be greatly appreciated until then ill be poking at it... thanks early
Check the transmission fluid level.
Trending Topics
08-04-14, 01:58 PM
#8
Pole Position
!
LMAOOOOO. FOR REAL at LEAST help the guy out, IM SICK of people replying just to say search, did you ever think some people arent good at searching or gave up when they couldnt find it? like get a LIFE, be nice HELP PEOPLE!
08-04-14, 02:00 PM
#9
Pole Position
Your problem to me sounds like the MAF is bad or the throttle body is super duper dirty, have both checked, those would be my first guesses. I've never heard of your issue where you have to floor it, that sounds like the TPS is staying closed and not opening... My guess is either the MAF or TPS. have them checked ASAP
08-04-14, 02:01 PM
#10
Pole Position
how many miles on the car? and what work has been done so far? Like the other guy said it could be EXTREMELY dirty or low transmission fluid, but this I highly doubt...
08-04-14, 02:32 PM
#11
I've been having the same issues with my GS400. The only thing I suspect is a bad Powersteering Idle Up Valve. I think it's not closing, and opening like it's suppose to be doing. Which in terms creates a vaccum leak that the ECU doesn't pick up. That's why there is no CE light. Right now I feel mine started working again all of a sudden and my car is running better. I've tried to cap it off and see how the engine runs, but I think the ECU is designed to have that valve installed. The reason I know mine is on it's way out is because sometimes on start up it get a puff of white smoke. Also when it's not working I feel my power steering is a little stiffer to turn. I haven't ordered a new Valve yet I'm waiting to see the outcome of it working for now. You can find better information on the LS400 forums under Powersteering Idle Up Valve. It's notorious for causing idle problem.
08-04-14, 05:20 PM
#14
08-04-14, 05:54 PM
#15
Driver
Thread Starter
Thanks man I appreciate ur help sometime even when you have an idea what could be wrong with the car if ur not familiar with the vehicle you look for people who's car may have given the same symptoms but the car has 275xxx mls on it and I put a JDM engine and tranny in it almost a year ago but all other components came with the car this is something I've never seen a car do and had no idea what could cause the car not to rev while the throttle is open.
