l3ata

Ok so i got a 97 honda civic si it used to have a 1.6 but it blew up so i had a friend put a 1.5sohc motor in it and now i have been having more problems my rpm gauge is bouncing out of control and when it does it it becomes undriveable and i can smell gas when it does it and my check engine light has recently come on and on another note i hear a nasty squeal when i first start the car or when shifting into first and second or shifting down to them any suggestions would be great thanks guys and the computer wasnt changed in it does it need to be???

l3ata

any ideas?

l3ata

bump come on guys im stuck

Former User

Pull the CEL codes. Is fuse 15 under the dash blown? If so, click here.

hondamark35

first off, i don't think you have a 97 civic Si.. pretty sure they only made them for the 99-00 model years.

my suggestion is to not let your friend put a motor in your car again... or have him fix it for free.

none of these issues sound related neccessarily, you'll just have to approach them one at a time. if you can be a little more clear on what car you have, what engine exactly and more about how the car is set up (what ecu, what year is the 1.5L, manual trans...?) maybe someone will be able to help.

l3ata

ya it says 97 civic si on the ownership the engine is a d15b think its a 95 motor manual trans not sure on the ecu the one that came with the car not the engine changed the fuel filter today not sure if that was the problem havent had a chance to go drive it

hondamark35

what are the 4th, 5th and 6th digits of the VIN?

...and the middle three digits on the ECU (XXXX-???-XXX)

l3ata

thought it was a si but maybe not because it doesnt say si on ownership after all ej8 is the 3 numbers on the vin is the ecu located right by the fuse box and running light relay?if so where are the numbers?

Former User

Sounds like you have a 97 EX, which had a D16Y8 engine. The current engine may be a D15B7 or D15B8 from a 95 Civic.

hondamark35

or he could be right about the D15B. it could be the JDM D15B, which is similar to the Y8 (i think actually almost the same as a D16Z6..)

anyway, so you have an EX with a D15B swap. if you're running the Y8 ECU on an OBD1 motor, i would expect you may have some trouble. look into an OBD1 ECU (P28 would be the common choice i believe). really, find out from your friend exactly what he did. did he modify the engine harness... is there a conversion harness already installed..?

the ECU is behind the passenger kick panel. pull the two clips loose and slide away from firewall to release. you'll see the ECU. if you don't see the number on side, you may need to look around the other side. two bolts should let it loose so you can turn it around.

l3ata

it says si on the back of the car and i looked at the ecu it says p2p

l3ata

and motor is the jdm d15b

Former User

I presume the PO purchased an Si badge and glued it to the back of his EX? The P2P ECU is stock for the Civic EX D16Y8 engine. Jump the service connector to pull the CEL codes and also check whether fuse 15 is blown. As mentioned, the OBDII P2P will look for sensors that the D15B engine may not have.

hondamark35

yeah, or needed a junk yard trunk after an accident...and all they had was an Si. either way, the VIN shows that it's really an EX. i hope you paid for an EX...!

l3ata

i jumped the service connector to pull the CEL codes and it blinked once so i t says thats the oxygen sensor im gonna try getting a new one u guys think that might be whats causing the problem with the rpm?

geneeunit

the OP could be from canada.. ey.

remember canadian SI = USDM EX and canadian SIR = USDM SI..

l3ata

ya its from canada

geneeunit

first thing to do would be to pull the codes like ron said. check the codes, and post them in here.. then you have somewhere to start.

Former User

Good thinking.

Former User

If a faulty O2 sensor causes a lean condition, then the engine may run like crap. Try unplugging the primary O2 sensor to see if the problem goes away.

l3ata

i unplugged it but still running like crap

geneeunit

was it one long blink? or a short blink? because if it was a long blink.. its intake air temp sensor.

it may be because the ecu is meant for a 1.6l.. and you're running a 1.5l make sure all the sensors are plugged in properly and check your iacv (idle air control valve).. maybe you have some plugs switched around. and if its a 95 and lower motor it might have an fitv (Fast Idle Thermo Valve).


i think pictures and/or a video will really help solve the situation.

l3ata

what do u want pic and video of? and thanks for all the help guys

geneeunit

i think video of it running would help out most.. and more details about the motor, ecu, harness.

l3ata

tried another 02 sensor still running like crap gonna try changing the crank angel sensor i guess