nkcalvert09

okay so i have a 93 civic si hatch and it has a b18. the guy that had the car before me didnt really know what he was doing i think. Engine light is on. and i took apart the ecu today and released it look like something blew on it. who knows. im gonna upload a pic of it. but if i was going to get a new ecu what exactly do i need to do. i know i need a OBD1 but i have no clue what to do once i get it

grumblemarc

iTrader: (4)

WHat ECU is in it now? WHat code is being thrown?
DId you buy it with the CEL on?

nkcalvert09

Well its a OBD1 and i just trying checking what code its throwing but i couldnt get the CEL to flash or ne thing. just stayed solid when i turned the car on. and yes the CEL was already on. I was just a idiot and didnt even ask about it

grumblemarc

iTrader: (4)

A B18 what? Do you have any more history on the car whatsoever? Pics of the "blown" ECU would be helpful.

nkcalvert09

not exactly sure. first honda. but okay just a sec. im gonna upload a pic.

grumblemarc

iTrader: (4)

You don't know what engine is in the car? I predict you will discover many more problems.
A solid CEL. This could be indicative of a faulty ECU.

nkcalvert09

http://s1137.photobucket.com/albums/...t=DSCN0314.jpg

nkcalvert09

sorry u probably cant tell whats blown. but its in the top middle next to the black cylinder things lol

grumblemarc

iTrader: (4)

ECU pic is too blurry. Is there a sticker of some sort on the side of the ECU? Somebody better than me can probably identify this engine unless you can read the stamp on the block.

nkcalvert09

http://s1137.photobucket.com/albums/...t=DSCN0313.jpg

there is a pic of the engine. and i think its out of a 95 integra

Former User

Swap in a known good ECU. But before you do, make sure none of the sensor connectors are swapped. Otherwise, you may blow another ECU.

0HAMOTORSPORTS

Intake air temp and idle air control valve plugs have been plugged in wrong. This is what blows that transistor on the ECU. You need to check your wiring to those two things and correct the problem, then replace the ECU. Also, more than likely the intake air temp sensor is fried so you need to replace that as well.

NotAJDMFanBoy

OBD2 ECUs have the same transistor as the part that blows when those plugs are switched. If you can't solder, someone else would be able to fix it.

nkcalvert09

okay im new to all this so im not exactly sure what ya mean by switching the wires. could someone please explain a little more of what i should do. and btw its a b18b1 thanks for the help so far tho.

Former User

Make sure the wire colors in sensor connectors match with the sensor.

http://www.phearable.net/tech/wiring...schematics.gif

nkcalvert09

o okay. thank you very much great help there

nkcalvert09

i checked it out and the only thing that i could tell that was wrong was ERG - Exhaust Gas Recirculation Solenoid Valve. Which there was no wire going into that plug

Former User

Did you check all of these:

IAT
ECT
IACV
TPS
MAP
EVAP purge
PS
VTEC solenoid

nkcalvert09

okay tps is pink and black. supposed to be light green or red/black. and map is pink/white supposed to be white. any ideas on where to go from there. every other one was fine

Former User

The TPS and MAP have three wires each.

Check the link I posted to determine where those plugs belong.

nkcalvert09

okay sorry now im just a little confused. So there should be three wires going into TPS then 3 Into map?

Former User

Yes, both the MAP and TPS have 3 wires each. Read information at the link I posted.

nkcalvert09

i have. i dont see ne thing about 3 wires.

Former User

nkcalvert09

ah that wasnt in the link. but im gonna go try to figure it out. sorry i know its probably a little annoying. first civic. and this one has some problems