Yamae

I don't think as you think.
As far as I know, any GX470 does not have those capacitors that contain infamous quaternaty ammonium salt in the ECU.

python

iTrader: (4)

so I had ordered my caps from digi-key and sent my ecm off to jim walker for repair. its being shipped back today and ill have it reinstalled as soon as I get it. I asked him if the caps were leaking..bulged..or any corrosion...he said everything was fine. I wasn't having any issues with my car (92) as it runs fine, I just did this because of everything ive read. ill report back when my car is all back together.
heres a copy of an email I got from him:
"Yes, please let me know how it goes with your car. I doubt yours will need to do the re-learning process since there were no actual failures on yours. I wish I could get those from other customers before they have extensive corrsion damage.
Your boards were 2 layer, not 4 layer like the 93/94 LS400. That makes it a little easier to replace components. I removed to silicon conformal coating, replaced the components, then applied new conformal coating in those areas. This helps to prevent corrosion on the PC boards."

bdazzler

Anybody solve issue with no overdrive (O/D light flashing) and no cruise control by changing capacitors or ECU? I've changed speed sensor #1 (error code 42) and transmission solenoids and still have same issue. I was advised faulty ECU could be the issue due to you guessed it, leaking capacitors. Just wondering if anyone had same issue as me and solved it through the topic or by changing the ECU. Getting expensive and time consuming trying to find the culprit. Appreciate any assistance/advice!

python

iTrader: (4)

car is back together...
one issue I was having was a little rough idle at cold start up...that's gone.
the car seems to be shifting better through all the gears. I will do a mpg comparison at a later date and report back,maybe ill just add octane booster to get great mileage,just kidding.
just to be clear here I had this done for preventative measure reasons...my car is going on 25 years old and capacitors do have a limited life expectancy.

RA40

iTrader: (6)

bdazzler if your ECU has not had the caps replaced, they are due. Plenty of strange symptoms depending on how much leakage is happening. get those caps replaced and tackle the next step if any continue.

python

bdazzler

Thanks for replying! Was just hoping there was someone who had same issues and replaced the caps or ECM which solved the issue. Seems some people replaced #1 speed sensor which solved it and then others the tranny solenoids so it's like a big ole mystery, hah hah.

The car hasn't really had any mechanical issues at all before this.

python

iTrader: (4)

I would do the ripple test if u were u bdazzler

OriginalLS

I have a very low mileage '90 LS less than 66000 miles. Ran erratically/sometimes stalled in high heat. I replaced all capacitors with ones suggested on this blog and car runs like new. When car left in sun/heat too long it will sometimes lose rpm/stall, seemingly from lack of fuel. Pressing on accelerator pedal will not effect rpm. It will immediately restart when stopped without fail. Seems like a fuel supply problem. I have read elsewhere on this blog of LS owner who had similar problems with heat and replace fuel pump resistor and or pump. The fuel pump relay is fine - removed and tested that with external power source. This is an immaculate LS400. Interior and Engine compartment is as clean as if new. Any ideas/suggestions appreciated.

bdazzler

I prefer champipple over just Ripple, lol. Seriously though, never heard of it. Care to elaborate? Getting ready to go outside and try to get at the ECU to have a look.

bdazzler

Just saw this, I guess this is what you mean: https://www.clublexus.com/forums/ls4...-by-yamae.html

Thanx.

oldskewel

iTrader: (1)

I've just ordered the caps, and am preparing to do this on my '91 with a problem that this might fix (on this thread: https://www.clublexus.com/forums/ls4...-egr-pipe.html ), and I know I need to get it done anyway.

Anyway, funny thing I noticed when ordering from digikey: after selecting the first item (10 uF cap), digikey automatically presents you with a table showing "Customers Who Purchased This Product are also Interested In:" Guess what's in there. Exactly every other single cap on the Cowboy/Yamae updated list from post #1. You guys are affecting the global electronics supply chain! It actually made it easier for me to confirm that I had everything right on the list.

Yamae

My intention is just extend the life of our LS400/Celsior not to affect the global electronics supply chain.
But in the past I have strongly experienced that my little work has affected a lot to parts manufacturing companies and the market situations. I had to be careful what I designed.

The other day, a director at the local Toyota dealer said, "Many old cars we have sold are still running around here and we cannot sell new cars well".

I said, "It may be because you have been doing good repair jobs".

He said,"We used to do the ECU replacing jobs but almost none these days. Old cars are still running many and I just wonder why?".

I don't think my assistances to local independent repair shops are affecting the dealer's business, but I just wonder why he said it to me.

python

iTrader: (4)

just to be clear..Toyota is not what it used to be in the way of reliability. theres other reasons they aren't selling new cars. so many issues with their engines like oil sludging and using cheap parts throughout, domestic cars have actually gained some ground..

kennruckey

I have a 1995 Lexus ES300, could I have the same problem? I have the symptoms. What Capacitors should I use? Same ones?

python

iTrader: (4)

95 es has issues with little stuff like window motors and things, that's actually a good year..they started having the sludge issue a few years later..97 or 98 I believe..anyways im not too sure about the caps in ur ecm..im sure yamae will inform u