Speedo and tranny wacked out
11-24-13, 07:50 AM
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Speedo and tranny wacked out
Hello forum members,Yes I am new to the site.I think it is a great site with all the expert advice offered here!Now I'm asking for some of the great expert advice!
First off my speedo will go to 20-40 mph just barely moving and go up to like 100mph at maybe 40-50 true mph!I have installed another ECM and the problem is still the same.I have cked the wiring In the trunk and no wires seem to be broken!Im leaning to speed sensors?This has the tranny shifting funny and out of wack.Car has power and runs pretty good just weird shifting and not really that Lexus feel?Thanks in advance for your expert advice!Car has 94 k on it very nice just can't get to run out!1994 ls 400
First off my speedo will go to 20-40 mph just barely moving and go up to like 100mph at maybe 40-50 true mph!I have installed another ECM and the problem is still the same.I have cked the wiring In the trunk and no wires seem to be broken!Im leaning to speed sensors?This has the tranny shifting funny and out of wack.Car has power and runs pretty good just weird shifting and not really that Lexus feel?Thanks in advance for your expert advice!Car has 94 k on it very nice just can't get to run out!1994 ls 400
Last edited by Lwiles31; 11-24-13 at 07:56 AM.
11-24-13, 03:28 PM
#3
Lexus Champion
have you dumped the ECU diagnostic codes?
just because you swap ECU's, doesn't mean the replaced ECU has new capacitors of the correct type, it could have capacitors in just as bad a shape as yours.
but before I did anything, I would drop the pan, replace the filter with a genuine Toyota filter, and use genuine Toyota T-IV to refill (you will need 4-5 quarts)
then, if it still is acting up, I would replace the Engine Coolant Temp sensor and do Yamae's ECU ripple test
just because you swap ECU's, doesn't mean the replaced ECU has new capacitors of the correct type, it could have capacitors in just as bad a shape as yours.
but before I did anything, I would drop the pan, replace the filter with a genuine Toyota filter, and use genuine Toyota T-IV to refill (you will need 4-5 quarts)
then, if it still is acting up, I would replace the Engine Coolant Temp sensor and do Yamae's ECU ripple test
11-24-13, 05:26 PM
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The ECM that came off the car is a re man.I opened it up and see that the work has been done.Not sure of the parts used.I will do the other things that were suggested.Im going to try and post a couple pic so you can see the parts and work done.In sure so are on the list not sure of a couple.Thanks a million for the help.
11-24-13, 06:30 PM
#6
Lexus Champion
UGH!! 
someone has worked on this ECU before, and did a really poor job and used the wrong capacitors!! (and horrible long lead lengths that also kill the low-ESR) - can I use your photos in the main ECU thread on the dangers of Beavis and Butthead rebuilding a Lexus ECU?
someone has worked on this ECU before, and did a really poor job and used the wrong capacitors!! (and horrible long lead lengths that also kill the low-ESR) - can I use your photos in the main ECU thread on the dangers of Beavis and Butthead rebuilding a Lexus ECU?
11-25-13, 04:03 AM
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Thanks cowboy,And yes by all means you may use photos!Who is a reputable person to send the ECM to and have it repaired properly.Im sure I could fix it if I had the right parts and a little insight.I am just swamped with work!
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