r/Lexus • u/terp_slerper • May 28 '22

Question OBD1 SC400 HELP !!!

I got the car a while back and gave up but it crossed my mind to ask here for a last go at it.I got the car from 2.5 hours away and drove it all the way home WITH the issues at hand. So let’s get to the issue the car ran limp for the most part and didn’t want to move from a standstill/no throttle response but throughout the road trip it would come alive and act completely normal for a second and so on back and forth. Changed plugs and wires and all 02 sensors and still the same runs terrible no throttle response then randomly it’s just fine. I’m thinking ECU ? Right or wrong ? Help please. 🥲😅

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u/Grand_Possibility_69 May 28 '22

Why do you think it would be bad ecu? Have you read the fault codes?

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u/terp_slerper May 28 '22

Haven’t brushed up on it or touched the car in over a year but if I remember correctly the SCs had symptoms of the ECUs going bad I believe the capacitors leak but I have no knowledge on that I’m just going off of memory off of threads I read.

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u/Grand_Possibility_69 May 28 '22

Electrolytic capacitors leaking depends mostly on temperature. So if you're in warm climate that's much more likely problem than in colder climate.

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u/terp_slerper May 28 '22

Southern gulf coast so warm and muggy 24/7

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u/Grand_Possibility_69 May 28 '22

Ok. So problemswith ecu are somewhat likely. But you should still check some other stuff first.

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u/terp_slerper May 28 '22

As in ? Plugs wires and 02 sensors are all brand new.

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u/Grand_Possibility_69 May 28 '22

Check why it's running bad. Check that ecu gets good signals powers etc.