mrsboss

Hello CL, I am new to this club and I have a couple of questions. So my 95 lexus had a blown head gasket in which I decided to replace the engine. The mechanic put a 94 engine in there and now is is smoking the injector is flooding with gas which appears to be coming out of the exhaust. I was told that I could replace the computer which would more than likely fix the problem. Either that or my wiring harness. Can someone please help, my car has been in the shop for 3 months. Can I use any ecu that comes from a 94 ls400?

oldyota

Your mechanic is an idiot if he didn't match engine and chasis codes There were options that made some differences. For example dual tps.
Changing out your ecu and or wiring is a cluster f@#k of an idea.

akitomk3

iTrader: (2)

By any chance this car you speak of is Green and in the NOVA area (SAM off of R1)? However, to answer your question that's a bad idea to begin with since a lot of the parts on the engine it totally different. He might have gotten away with just head and block but everything else like the dual TPS, or the MAF, and im sure lots of other stuff is different. And which ECU is it running on?

sanstoette

I'd imagine with the older motor being non interference the compression ratio is a bit lower... so if nothing else the tune will be off a bit.

PureDrifter

iTrader: (10)

all the electronics are quite different. mechanic is an idiot.

sha4000

iTrader: (1)

Such a simple thing for a qualified mechanic to do and he just screwed it up. Ask him to put the correct engine in there which should not be too hard to find!

mrsboss

No it's not green its blue and the lexus dealership informed me that the ecu is the original 95. they also suggested that try a new ecu versus trying the wiring harness first. $$$$$ what do you think?

mrsboss

thank you all, an idiot he is and I am still clueless as to what to do with this car. A simple engine replacement hs turned in to a 3 month nightmare.

Shiryo

Yeaaah, he shoved a 1st generation 1uzfe that even within the 1st generation underwent a ton of updates and then was updated even more in the 95+ models... What an idiot. For that idiocy, they should replace the whole entire engine, trans, harness, ecu, etc for a 98+... Free. What's even worse is that you're saying it was done at a Lexus Dealership.... Ouch.

RA40

iTrader: (6)

New wiring harness?! That's crazy

What shop did the work on this?

91LS4OO

First off. why the hell would you replace the whole engine from a blown headgasket???? the money you spent could of gone into building the orginal strong as hell motor. wtf?. ......

Makes my blood boil.

I say part it out and get a new ls400.

well good luck !