1WILLY1

iTrader: (9)

Guys I am going through automotive hell.

My lexus started giving me problems starting up and threw out a code 41 "tps".

I replaced the tps and now the problem is still going on.

My mechanic thinks I need a new computer but he also says it is hard to say forsure.

Is there a way to tell if the computer needs replacing?

Ive already wasted over $300.00 on an unecessary repair.

This problem has been going on for weeks(trouble starting-stalling-weak revs)

Thanks guys!!!!

Please help!!!!!!!

mehsoarer

iTrader: (3)

Not sure myself how to troubleshoot an ECU issue.

I thought that mine might have been bad, but the issue seemed to have simply gone away on its own.

I had purchased a used ECU from eBay for $140, and never ended up using it.

If you do end up needing one, ive got a 92' SC400 AUTO ECU that ill do $100 shipped.

MIGS

iTrader: (15)

drive your car to the Toyota dealership, pay the $49.95 to have them check your car with their scan tool. they will tell you if its bad right away.

problem half solved.

1WILLY1

iTrader: (9)

Thanks guys!!!!

I am on my way ot the toyota dealer right now.
I really hope they can find out the problem.

Almost seems like an electrical short or something.

This sucks so much.

And if they tell me I need a ecu I think I would like to get it from you if i cant find anohter one in my local area.

Thanks

MIGS

iTrader: (15)

i recently bought an ecu off a memebr on here way cheaper than buying anywhere else. including fleabay.

just post up a "WTB" in the classifieds sections if you doo end up needing one and i'm sure someone will have the one you need.

peace

imDementeD

iTrader: (7)

i also purchased a good working ecu off here for a good price....and a few other things so far everything ive gotten off the people at this site works just as described and for a good price

Sc300TT92

One good way to check to see if you have a bad ecu is to pull it and check the Capacitors. To do this disconnect the battery, of course, and then disconnect your ecu. There are four screws on either side of the ecu. Once you take off the outer covers you will be able to see the board. Pry up the board very carefully and look at the other side, you will need to look at the capacitors. The capacitors are cylinders sticking up on the board.
Many early 90's Toyota and Lexus computers will "pop" these capacitors. Check for brown, yellow, or clear fluid coming from the bottom of the cylinder. It will leak out on the board and cause all sorts of crazy problems.
If you have any questions or want me to look at pics of your board just send me a pm. Hope this helps.

Klaus

iTrader: (1)

Bad capacitors won't always be that obvious- here's a good example:



The easiest one to stop is in the right picture- the middle capacitor. That's a blown cap. Hard to spot, but if that top is not perfectly flat the cap is blown.

Of course if it looks like this it's obvious:



Hope this helps your inspection

acsc300

the easiest way to check would be to swap in a known good one if you know someone with the same car or could find a good one cheap. ECU's "usually" dont go bad but s*** happens. I hope you get it figured out.

1WILLY1

iTrader: (9)

Guys I really appreciate the help.

I am a new member here and so far everyone ive spoke to has been happy to lend advice and help, this is a great site.

Aside from that This problem has been killing me. Two weeks now it has been going on.

Ive broke down and booked an appointment to get the problem diagnosed at lexus dealer.

I wish I would of done this from the start instead of wasting time, money and labour trying to solve the problem on my own.

Anyways you live and learn I guess.

I hope it is just a simple sensor or something.

I am surprise that with only 140 000 kilometres on my car I am having such problems.

Anyways thanks again guys !!!!!!!!

EUROJulian

That is not exactly correct. It is hard enough to diagnose computer problem on OBDII compliant vehicle, on OBD I there is no easy way. Charge you quote represents simple diagnostic fee, usually one flat hour (my last shop charged $98 for flat hour). With new TPS in comp has to be back-probed or v-bobed for signal to determine if wiring from sensor is OK, after that check with known good comp. That is electrical diagnostics that take some time and money.

EUROJulian

Not millage but actual age is important to determine electrical or electronic system vulnerability. Usually due to material aging and deterioration

twizted

iTrader: (2)

I wouldn't say that Ive had two go bad and Ive seen many members with dead ones.

Guest

buy my ecu buddy. lmk