1998 lexus ls 400 stalling sometimes while stopped in traffic
09-22-12, 05:38 PM
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1998 lexus ls 400 stalling sometimes while stopped in traffic
Does anyone have any ideas on the cause? It generally has happened after 45-60 minutes of driving with long periods of stop and go traffic.
I received no error lights. The car starts right back up. I have had the throttle area cleaned. The battery and alternator are fine. Otherwise car has 218k miles and other than this issue is running fine.
My mechanic has suggested replacing the throttle sensor or the whole throttle assembly but he is not sure either will fix the problem.
I received no error lights. The car starts right back up. I have had the throttle area cleaned. The battery and alternator are fine. Otherwise car has 218k miles and other than this issue is running fine.
My mechanic has suggested replacing the throttle sensor or the whole throttle assembly but he is not sure either will fix the problem.
Last edited by Jc42223; 09-26-12 at 05:11 AM.
09-22-12, 06:42 PM
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I'd be curious what people say as well. My 95 has stalled on me twice, after about an hr each time of highway driving, while exiting on the off ramp the car just quite running. Popped it in neutral and she started right back up without any issues.
09-22-12, 07:39 PM
#4
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Your symptom is probably the same as the known issue which happens after the high speed run and the ECU 89661-50224 can fix it in most of the case. This was a common problem in Japan among 95 models and many have succeeded replacing the ECU although the JDM has a different ID number. 89661-50220, 89661-50221 or 89661-50224 are ECUs for US 49 states.
In case of the California model, the original ECU either 89661-50230 or 89661-50231 will be affected and the TSB says to replace to 89661-50234. But there is another new information that the number has been changed to 89661-50235-85.
Hope this helps.
Last edited by Yamae; 09-22-12 at 07:46 PM.
09-23-12, 08:05 PM
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09-25-12, 09:10 PM
#8
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the 95 issue is a known ECM programming bug, as Yamae mentioned
no idea on the 98, but watch out for the ECM capacitors, they are causing issues on all LS400 models at epidemic proportions
no idea on the 98, but watch out for the ECM capacitors, they are causing issues on all LS400 models at epidemic proportions
09-26-12, 04:21 PM
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Is your ECU for 95 the original 89661-50220 or 89661-50221?
Your symptom is probably the same as the known issue which happens after the high speed run and the ECU 89661-50224 can fix it in most of the case. This was a common problem in Japan among 95 models and many have succeeded replacing the ECU although the JDM has a different ID number. 89661-50220, 89661-50221 or 89661-50224 are ECUs for US 49 states.
In case of the California model, the original ECU either 89661-50230 or 89661-50231 will be affected and the TSB says to replace to 89661-50234. But there is another new information that the number has been changed to 89661-50235-85.
Hope this helps.
Your symptom is probably the same as the known issue which happens after the high speed run and the ECU 89661-50224 can fix it in most of the case. This was a common problem in Japan among 95 models and many have succeeded replacing the ECU although the JDM has a different ID number. 89661-50220, 89661-50221 or 89661-50224 are ECUs for US 49 states.
In case of the California model, the original ECU either 89661-50230 or 89661-50231 will be affected and the TSB says to replace to 89661-50234. But there is another new information that the number has been changed to 89661-50235-85.
Hope this helps.
09-29-12, 10:51 AM
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To summarize, some suggested causes are the throttle sensor, the ecu, the alternator, the battery and a dirty throttle.
Thank you very much. Please let me know if you have any other ideas.
Thank you very much. Please let me know if you have any other ideas.
09-29-12, 11:47 AM
#12
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well you definitely should clean the throttle body and butterfly on any Lexus with 218K - wear a respirator, throttle bottle cleaner is wicked bad to breathe!
if that doesn't solve it, then on a 95 the ECU programming is a known issue, and on ALL LS400's the ECU capacitors are an issue - both ECU issues can be fixed yourself if you are a MacGyver type
and a junkyard ECU will not solve either problem, unless you get lucky on a 95 and find an ECU with the newer programming, but the capacitors will still need replacement!
if that doesn't solve it, then on a 95 the ECU programming is a known issue, and on ALL LS400's the ECU capacitors are an issue - both ECU issues can be fixed yourself if you are a MacGyver type
and a junkyard ECU will not solve either problem, unless you get lucky on a 95 and find an ECU with the newer programming, but the capacitors will still need replacement!
09-29-12, 03:49 PM
#14
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There may be a possibility that the fuel pump is not functioning well by the heat. Was your problem started in this summer? Was it OK before that? If so, it must be a temperature related problem if not a fuel pump.