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it seems to be fine now , i may have another issue with #5 , but atm its running great, with the 3rd replacement ecu. Only thing i notice is it has a light gray mist when cold , but after its warmed up its all good

i will probably do just that. im assuming the drivers were bad in the old computer , as it hydrolocked the engine but with the new engine it runs fine , i wonder if it was a combination of the two both stuck #5 and an ecu . maybe thats why the engine runs a little rich when cold

So i wanted to give an update on the engine flooding issue. I received a new used ecu and cleaned out all my cylinder of fuel. i cleaned the spark plugs and reinstalled them. I noticed that the #5 cylinder was full of fuel when i took out the plugs. All the plugs were black and wet with fuel...

do the injector grounds pulse when they fire?

So update on engine issues. the new ecu didnt change much, i still idles right , but it still has smoke coming out that smells like fuel. i havnt tried driving it to see if this is just residual fuel or what . Injectors maybe? . #6 cylinder was flooded when i pulled all the plugs out. it was the...

im guessing the injectors stay on all the times when the output is grounded?

nvm i just watched your youtube video, test seems similar to swapping around ignition coils for leading and trailing misfires

ive already sent out the " suspect bad ecu" but just for my own knowledge, how do u test to see if the drivers are bad?

have you seen issues with injectors over fueling due to ecu issues ?

i dont have the rear 02 sensors wired , but the front ones appear to work fine. I Don't suspect o2s to blame . it didn't affect the drivability prior to the 1st computer. i replaced the old computer due to it losing m-rel power out. Im more concerned the engine hydrolocked when i was trying to...

SO i have a 88 cressida with a 95 ls400 engine swapped I had to recently replace my Ecu with a used one , due to having a power output issues on my m-rel on the original ecu. now i have major issues after the computer swap!!!! The first day i installed the new ecu it idled really low but...

fair enough.. guess im getting a ecu

so this is a common trait of the ls400 ecus to happen?

Ok.... so updates. the aftermarket relay didnt work, but i got me thinking.. So the m-relay only comes on when there is a constant power supply (which it has) , and a switched power from out the ecu that is turned on with the ignition to the run position, and a ground (which it has). I checked...

im going to install a aftermarket relay tonight so fingers crossed . im still confident there is a short somewhere . its just hard to find

Well... updates . So got the new fuse block installed into car and it drove for about 10 miles , and after it was warmed up the check engine light turned off and shut the entire computer / fuel system down . i was able to get it home eventually under light pedal effort , and after messing...

Update , SO i found out the fuse box only is putting out 1.6 v from the b+ circuit directly from the fuse box. So the fuse box is shot at the efi main relay. i need to replace the fuse box and clean everything up. So if anyone has a mx73 1988 Cressida fuse box im looking to buy

Ok so more updates . i replaced the efi main relay, and it changed nothing. I did find however that the B+circuit has only 1.6 v at the obd 1 b+. it also has a ground. im wondering now if this wire somewhere is pinched and is grounding the circuit , which would explain the blown fuse i stuck in...

the fuel system is run thru the factory cressida wiring . the lexus has its own module for fuel system so i cant replicate the way the doner engine was wired from the factory. i believe i found the issue. i noticed the check engine light wasn't coming on so i checked the powers at ecu. i found...

the wiring runs thru the cressida on a circuit open relay, before, when i got the wiring finished the fuel pump would come on in the run position and the crank position . Something has changed since this issue has occurred . the fuse was blown for the neutral safety switch , still after changing...