I put knock sensors SU7012 instead of SU7015. The car is still running rough. Do I have to reset the computer or did I do something wrong. Please help.

 

I'm curious to hear of the progress on this. I have the same situation. 1999VDP. One sensor is $103.00 (SU 7015), the other is $28.00 (SU 7012). They look identical!
Cheers, Steve

 

I am pretty sure the knock sensors are not why it runs rough. I suspect you still have a wet coil from the original thermostat riser flood.

 

I agree with sparkenzap, sensors don't appear to be the issue. Check the coils and wiring under the plastic covers for excessive moisture. No reset, no passing go, I just put the sensor on and started driving.

 

I can see the moisture (liquid) laying along the manifold. Should I drive it even though it's running rough and still has engine light on and running rough?

 

How do I get the moisture out?

 

How do I deal with the wet coil

 

Should I run the vehicle to get rid of the moisture? Please I need help.

 

I wouldn't drive it until you got this narrowed down a bit more.

From various posts it looks like your top end took a bath along the way?
What Caused this?

Get a long handled screw driver and some rags and work them down into the manifold well to get as much fluid out of there as you can. There's a heater hose down in there too so don't get too aggressive. I'd pull the new sensors while you do this and make sure the seat for each is clean and dry before reinstalling.

Each plug has a coil pack with a boot over the plug. Once you pull the cover to the coils you should be able to tell if it got wet under there. If it was me, I'd unbolt any suspect coil and remove it before I blew it out with a compressor and hit it with some contact cleaner to evaporate any residual moisture. I'd check the plug well to make sure there was no fluid in it and reinstall.

If you're getting any codes related to misfire on a specific cylinder then I'd concentrate on those coils first.

 

This was caused when the thermostat housing was teplaced. When connecting the hoses back to the thermostat housing, the large hose from the radiator didn't get connected back, and when the coolant was added to the reservoir tank, it pure out of large hose all over sensors and along manifold.

 

It's likely that some of the coils got wet. Please follow the previous suggestions to check that the coils and the spark plugs are clean and dry.

 

If the spark plugs or coil pack were damaged, would a code show

 

The only code that shows is po327 and p0332

 

Dry the coils.

 

My first time working on a car. How do I get to the coils?

 

This video should give you a good idea of how to access the coils. Same engine - different model. Once cover is removed (in video) it should look familiar.

 

if plugs or coil pack were damaged, I'd think you'd be getting codes at least for misfires on those cylinders. If they are wet, or the wells are full of fluid you may be getting an arc to the block when the coil fires which could reduce spark on the end of the plug and result in minimized combustion in the cylinder IE- the fuel being fed into the plug isn't properly burning resulting in a KNOCK which your sensors, new or old is picking up. I was just wondering if you had any cylinder specific codes showing, as those would be the first coil packs to inspect.

 

Can I drive it 2 miles to auto zone?

 

Interesting. I have a resurgence of 'restricted performance' warnings and the code is knock sensor bank A. I had the very same 3 years back, and replacing the knock sensor did the trick.... up to now. More recently, I associated my issue with water infiltrated in the gas tank, somehow. My gas filling cap 'housing' was indeed flooded from the clogged drain (after the heavy rains we had here in central TX) and after adding some seafoam and drove a little, it all disappeared. This was a month ago or so. It's back (intermittence). While the car has been in some rain again, I did have it in the garage for most part, and as far as I know the cap filling 'housing' drain was not clogged. But did water find its way anyway? don't know. Will read the code later. It seems to happen only out of sharp turns, or idle (for most part). The wet coils is something I will look into though. Having said that, I have had 'wet' coils before and the code was cylinder misfire, not knocking related. I will keep you posted, but I will also keep an eye out here. Cheers!

 

Brian:
What you say sounds right, although I do not know how watered fuel would cause knock, but I assume it might. What is not clear in this thread from Miss Charlee is her previous coolant loss all over the top of the engine, which can cause knock sensor problems (specifically on an AJ27 engine) due to the sensor housings cracking with age.