i just install sohc vtec zc in my crx 1989., this motor is brother of d16z6 same pistons,rods,cranck, the only diff, i notice that this engine has no oil vtec pressure switch

i swaped to obd1 and use the stock ecu for that motor p70

the problem is i can not rev past 3500 rpm ., and cel is jumping but i can not check the cel code for some resons.

so my question is what can i check to solve that problem ?

 

It is running in limp mode for some reason.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by micha &raquo;</TD></TR><TR><TD CLASS="quote">It is running in limp mode for some reason. </TD></TR></TABLE>

x2. Check and make sure you have the right ecu for that engine and that you have all the necessary sensors hooked up. A knock sensor or especially an o2 sensor that's reading improperly or not reading at all can send your car to ****.

 

Wait... you switched the motor to OBD1 how? But you are still using a OBD0 ECU?

 

yes i did not connect my o2 sensorto the harness . may be it ?

iam not sure if it has knoking sensore or no but i think no is not ?


micha:Wait... you switched the motor to OBD1 how? But you are still using a OBD0 ECU?

for sure no the car was obd0 and i change it to obd1 to can install my obd1 p70 ecu

 

r u sure man if i did not connect my o2 sensore to harness can cause that problem ?

 

If you don't connect your O2 sensor it will make your car run in limp mode.

 

ok i will do it.,

there are a problem will face me ., this engine is one wire o2 sensore and i use the d16z6 harness which have 4 wire for the o2 sensore ., so what should i do ?

 

There is a thread somewhere that shows how to change it over. You will have to search for that though.

 

ok man thanks alot for helping you seem to be good and kind man

last question
is this motor sohc vtec zc jdm which came with p70 ecu have knoking sensore ?

and if you dont sure please tell me where to locate it and i will check it .

 

I am trying to find the answer now.

 

Everything I have searched for and looked at points to the P70 having no knock sensor.

 

ok man ., i will start with my o2 sensor today., then i will tell you the result

thank you

 

No prob. Good luck.

 

i checked it today ., and its not o2 sensor at all ., its bad distributer

thank you man