LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Throttle problem

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Old 07-01-08, 09:03 PM
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TJW98LS
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Default Throttle problem

So I have an issue where ocassionally when im giving it alot of gas the car will pick up but then completely choke and then if I let my foot off the gas it will be completely normal. I let it pass last year when I was accelerating up an on-ramp, but this has happened 2 times this past week. Its a little dangerous if you have to merge and the throttle dies...which is what happened again today.

Any idea what could be happening? TPS getting bad or something? Maybe the line getting choked somewhere? I dont get any engine codes, so it leads me to believe something is clogging the fuel line somewhere.
Old 07-01-08, 09:35 PM
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j stuff
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exactly whats happening with me

tps doesnt seem to be the problem

im thinkin either sparkplugs/wires or the ecu itself.

My TRAC light and Check engine light pop up right when it happens. I gotta baby the throttle or else it chokes up and starts surging not gaining any power
Old 07-01-08, 11:38 PM
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TJW98LS
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Originally Posted by j stuff
exactly whats happening with me

tps doesnt seem to be the problem

im thinkin either sparkplugs/wires or the ecu itself.

My TRAC light and Check engine light pop up right when it happens. I gotta baby the throttle or else it chokes up and starts surging not gaining any power
plugs were changed just recently. I havent seen any lights because it normally happens when I have all attention on the road. I run full 93 octane in the car so maybe its something in the tank? Anyone reccomend something that might fix the problem?

Its something I would really like to figure out
Old 07-01-08, 11:50 PM
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PureDrifter
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not sure but i remember reading something about either the throttle sensor or the pedal assy. itself...cant remember.

i know another member had a similar issue and had to replace one part...
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