Knock problem

[Hondakiller]

Let see I have been having this problem with knock. The car will lose power and it only does when You are cruising and maintaining speed. From a stop as well but only when when I'm driving normal. Now if I take off from a start and into the throttle hard have no knock. I have a scan master 3 and it's read 43 and flashing all the time. It's been like this from some time now don't know what else to do.

Thanks
Matt

 

[jnava]

You pretty much have figured out the issue, the goo has probably gone thus making it more sensitive to engine noise. Lifter tick can definitely cause it but first check if the goo is missing off the knock sensor.

 

[Hondakiller]

I'll check that. But if the sensor is but will it make the engine lose power?

 

[LIV4PSI]

Yes, the ECU pulls timing when it sees knock. Your computer is trying to slow your car down, because it thinks there is severe detonation.

 

[Hondakiller]

Ok cool I'm going to say that is what is going on. Cuz the car over heated one time and it could of hurt the sensor

 

[Hondakiller]

I change the knock sensor. And same problem. This might be a dumb question but can too hot of plugs be causing the knock? Cuz the only time knock happen is when cursing. The car has 170,000 miles on it. Iv been slowly working on this car. About a year ago I put on all new timing parts, water pump, new half size rad, new head, all new gaskets, all new hoses plus vacuum lines, and a new evo III turbo. With 15 psi. Drove it for about six months No problems. I thank I change the spark plugs from normal NGK plugs to the NGK IX iridium plugs. Then parked it for about four months. Started driving it for about a month now. I just recently put on FP manifold, 3" down pipe. 3" to the back, clutch, EPROM not in yet, and of corse a new knock sensor. The lifter have a small tick but not bad it all ways had it. But the main problem is I don't know to much about knock. So anything could help!

Thanks
Matt

 

[beaner]

43 is the max the ecu will see for knock, so something is wrong.

How did you tighten the sensor to the block? The sensor will misread is over tightened and its _way_ easy to do so. I'm not sure on the exact tq spec, but it's very little. I tightened my sensor with my hand, and a dab of thread lock for peace of mind.

 

[Hondakiller]

I had the problem be for the new knock sensor. I just snug it up it should be fine

 

[mitsuturbo]

Something is definitely amiss. If it were a knock sensor connection issue, i believe it would count 9, and throw a CEL.

If you're seeing 43 counts of knock on a NEW knock sensor, i'd start investigating timing (including mechanical timing of cams/crank), intake leaks, airflow, and fuel delivery.

Are you seeing knock in off-boost conditions as well?

 

[Hondakiller]

I've check the timing it at 5 degrees at idle. The only time knock happens is from a stop, and cruising. If mash the throttle it will hesitate for a second and then clear up.

 

[mitsuturbo]

Are you running an AFPR? Could be a fuel pressure related issue...

 

[Jason G.]

What other mods do you have, specifically fuel mods?

 

[Hondakiller]

No I don't. But I have a A/F gauge. It reads optimum when cruising. And rich when heavy on the throttle at higher speeds. But for the must part its reads optimum.

 

[Hondakiller]

There are no fuel mods on the car.