General engine questions/issues that aren't specific to the other categories
User avatar
By bren94cx
#108543 ok i did a swap of a d16z6 into my cx chassis over the weekend
i got it all together and started it
i got a check engine light
and the temp gauge is going up pretty qucik (t stat?)
and the engine is pulsating....

i dont have a obd reader to plug in and see what the code is..

any ideas???
User avatar
By Classiccarsrule85
#108545 ok you dont need a obd plug reader thing just some what to connect one side of a plug to another....if you look above the ecu you should see a green sheved blueish plug with two wires connect them to each other using a wire or those wierd fork connecter things that you get in the wireing kits....anyhow then turn the key you should see the check engine light start flasshing solids are tenths and dash's or blinks are singles so if its solid solid dash it would be check engine code 21.....

Im thinking 2 codes are going to be your vtec solinoid since im sure you arent lucky enough to have a 1992 civic you will have to wire up vtec to the ecu. using a pin out

You probaly also need to bleed the coolant by taking off the cap on the radiator and sorta squeezing the hose on the bottom to move coolant throughout the motor. this should stop the puslating

Also if it was a used motor you may need to change the thermostat it may not be opening allowing for the temp to rise considerably high.....

And just to make sure you are using a 4 wire o2 sensor on a z6 harness with a P28 ecu?

hope this helps.....

I too had a Z6 in my cx and experienced these problems so thats why i know so much lol however i wasnt lucky enough to have done the swap i bought it that way.....
User avatar
By teal_dx
#108552 here's how to check the code:
http://civic-eg.com/viewtopic.php?t=1558

The engine revving up and down is probably a vacuum leak, check all your hoses and make sure nothing is missing.

it can also be due to air in the coolant, which can also cause the temps to be high. So try bleeding the coolant system too.
After you fill it, start the car and get the engine warm. The thermostat will open and the coolant level will go down. keep topping off the radiator every time the coolant level goes down. this will eliminate air bubbles. You may need to give it a tiny bit of throttle to get to a temperature where the thermostat will open, it helps too have a buddy watch your temp gauge if you're doing it for the first time.
User avatar
By yashep
#108596 there's a sensor on your engine block (coolant sensor :?) that might be shot or not connected correctly.