Plz Help- I need car for work Tommorrow!!!!

[bvanfossen]

My windshield leaed last night onto my ecu ! I opened the ecu up and inside is dry. the connections were wet with water inside. the car ran awsome last night, as it always does- but today it would hardly start and whe it did- it smokes and runs REALLY ruff! especialy in lower rpms. i have a hair dryer trying to dry it out now- but i don't think its going to do the trick- i think something shorted in the ecu because of the water shorting the connections together- Any suggestions? Any are very appreciated!thanks Brian

[elwesso]

Hmm... Thats odd.. I might bet there is some leakage into the engine bay somewhere...

Hopefully nothing got screwed up too bad, meaning none of the wiring is messed up.. Hopefully that taking out the ECU and letting it dry out is a good move.....

Without another ECU, im not sure what to tell you...

[QShip]

What year is it?

[elwesso]

According to his profile hes got a J

[IvoryJ30t]

my original project J30 did that.

your car was most likely in an accident that required replacement of the windshield.

when the windshield was replaced, it was not fully sealed. your best course of action is to have the windshield removed and resealed.

when the car starts, its has a hard time starting and idling, runs real rough, and really rich [black smoke out of the exhaust]

[bvanfossen]

sorry for the delayed response!!!! thanks to all who reply!!

it's a long story but i had to remove the windshield moulding- which is getting replaced this saturday!- and as luck would have it, water leaked in on my ecu. i took ecu apart and it is dry inside but the connection and connecting wires were soaked! i dried them out on sunday night- and ever since #5 injector is pumping so much fuel into the cylinder that it has flooded into my crankcase and has caused all oil seals to leak!!!!!! f!!king nighmare !!!! i changed my oil tonight, checked the injector to make sure it's working properly, changed fouled plug (fouled from this), and scanned the engine for any codes- there isn't any!! i also had my friend run a consult on it and no codes !!! the problem doesn't go away- i can unplug #5 cylinder while it's running and it runs the same- proving it's running on 5 cylinders! #5 is gettingso flooded it's drowning out the spark so it can't fire!----PLZ HELP!!!

my friend had 2 ecu's for a 93 300z & 94 300z (mine is a 4/93 j30) and the problem seems better- but now cleared up. the 300zx ecu's show no codes present either! he says mine needs a new ecu and the problem doesn't totally go away because the other ecu's from the 300z doesn't clear it up because the are for the wrong make and year. for '93 it was a split year- 5/93 & up use a different ecu than previous of 5/93 j30.

Can anyone give me the "low-down" on the ecu's do the 300z and j30 ecu interchange??? whats the differencebetween ecu's before and after 5/93? THANKS FOR YOUR HELP!!!

[elwesso]

Early production always is different... I used my completely different ECU from a "95" Q45 in my early 94, and it was completely different options (with TCS, HICAS and so forth)..

Id stick with a J30 one..

However, i wonder what is causing it to do that, if anything it sounds like it shorted one of the injectors and its stuck open.... Might replace it?