I concur ^^^^^^^^as well.....

 

Well. lets just say I think I fixed it, for the price of free. Well the knock sensor anyway lol. I think I'm just gonna drive it for a few months and save some money, get something else. Sucks man. I just saw a 2001 Solara with 120k miles looked brand new for $3500. Just hope she holds up for a little longer.

Now I just gotta fix a massive air leak, a year or two ago I had a p0440? evap leak, it was the "overflow check valve" on top of the gas tank, I thought it was a bright idea to change all the little hoses while i was in there, didnt realize you needed Gas rated hoses for that... . geeze well I'm learnin lol.

 

Ok so another update, the "fix" ive done has cured the light, I have OD again and car runs pretty good, but its still "knocking" or sounds like it is, could something besides the knock sensor be causing it to knock?

 

When the knock sensor go(es) bad, the sensor sends out incorrect signal. When the sensor is working, it sends correct signal to ECU to manage ignition timing within limits. You can have actual knock if the timing is incorrect, carbon buildup, low coolant level, bad gas etc. You could also be hearing something rattling.

Salim

 

I believe it is knock, I can put in premium fuel and add a little octain booster and that would almost make it go away completely, it almost sounds like marbles bouncing around inside the engine and only when giving it gas, like taking off from a stop light.... but the cats are going, rotton egg smell when i get on the highway, and i can hear a raddle when in park, sounds like the flex pipe or a heat sheild raddling on something, or maybe a engine mount, but their all fine. I've also been working on a 2000 f150 with a buddy, it has a dual exhaust kit on it "Y pipe", It has the same rotton egg smell and weird idle issues, a few weeks ago I noticed exhaust was only coming out of 1 pipe, so i looked under there and it looked like someone took a pair of channel locks and crimped one of the pipes shut, I was confused so i took it to a guy who cut it off and just put a new pipe in, when he flipped over the old pipe a bunch of catalytic converter pieces came falling out.

 

Magna-flow offers aftermarket converters.......
I'd throw a can of seafoam in a half full tank......

 

Done that, about 18 times lol

 

I think you have diagnosed the problem .. or atleast one sub-system --> Exhaust.

Don't overdo this, but you can momentarily put a rag in the exhaust outlet and see if you can spot leaks.

I had a crack in the first cat and it was hardly visible. When I disconnected it, it came out in two pieces. Solution was easy enough --> weld it back. When I took it to the welder, he could not help laughing as I had put alignment marks while there was no way to twist it.

Salim