Sr20det Top End Power Loss

[scca_civic]

This is the problem that I have - I know it is probably something really simple or stupid.

I got my car together - drove to and from work 2 days in a row. I had great power those two days, but on the second day, when I rounded my street, I put it to the floor and I didn't have any top end power. Mind you, the car ran great and at power to the rev limiter before this incident. When I got home, the engine was knocking. So I replaced the plugs and reset the timing(didn't have to change it). Nothing worked --- So now I got the new Iridium 7x heat range plugs - the knocking is gone - but I still don't have top end power.

--- I can't tell you exactly what RPM range - because my Tach wouldn't work - but I am guessing around 5k or so. -----

The only thing I can think of is my knock sensor is retarding the timing - but I don't know if it is good, bad, or if my car even has one --- people have said its on the back of the engine, but with out pulling the engine - its hard to see back there unless I know for a location to look at.

PLEASE HELP MY SR GET BACK ON THE ROAD

[cotbu]

It's attached to the block on intake side, Under the 2 middle runners!
Test it from it's harness. Only take apart crap you plan to replace i.e. gaskets etc.

Ps don't quote me get FSM's s14sr s13ca and s13ka and cross reference assuming you have an s13.
I had the s13sr but....

[scca_civic]

Ok, I seen in the s14 manual where it is located ---- I need to double check that it is hooked up ---

Also, how do I know the the heated oxygen sensor is bad ???? Could it be sending a message to the ecu to make it run too lean where it is stalling in the top rpm range????

[smithers584]

you can shoot the wires for the knock sensor, like pin a to ground, and i think you are supposed to get around 550 ohms if good. for the 02 sensor, no, it usually will send a message making it run to rich, but you can shoot the outside two wires, a and c, and check for continuity. the fsm says 3-1000 ohms and anything outside of that is bad. most of the time they are bad you will just see them open. give that a try. also, your knock sensor could just be loose.