Weird thing happened last week and I would appreciate opinions.
It was the first nice weather weekend this spring, so it was time to wash winter off the car.
It was also time to either replace or wash my AEM dry flow filter for the Stillen/Wolf pop charger.
I removed the filter and washed Sat. night. It was still soaking wet Sun. morn, so I backed the car out of the garage without a filter and shut it off. I then washed and waxed. After I was finished with the wash, wax, vacuum, etc., I again started the car cold, pulled it into the garage and shut it off. No issue.
I re-installed the now dry filter and called it a day. Mon. morn my wife calls and says, "what did you do to the car!" It barely started and it's making "a clicking noise".
I told her to leave it be and I'd deal with it when I got home from work.
I get home, check the oil level and also check for any fault codes-all is well. I start it and just about crap myself. It's knocking!
I shut it off and open the hood. I start it again, (hesitant to start and running very rich), and it's still knocking. Sounds like a heavy knock, not a tic.
I get a screw driver to place on various parts of the engine to try and determine were it's coming from and after about 1 min. it goes quiet.
I take it for a drive around the block and all is quiet and well.
We've since put over 150 miles on the car and all is normal. I changed the oil yesterday.
My thoughts are that by starting and shutting off so quickly with the filter removed that it dumped a ton of fuel in and it was like "run on" or "diesel
effect". At least I hope so.
Any thoughts?

 

Two years ago, mine did that once. It felt like a coil pack went bad but threw no codes. I went back a couple hours later to look it over and it has run fine ever since.

I still don't know what caused it.

 

Hmm. Maybe run some Lucas oil treatment for a couple tanks. Good for the ol' injectors.

 

It was very strange. Still no issues and it runs as smooth and strong as ever. I even gave it a slight beating to be sure. By the way, it's got just over 100k miles on it now.

 

You don't need to do anything to your car other than never turn it on and shut it right back off when it's cold (not been started in a while), especially twice in a row! This happened to me with my last car a couple times when I was in a hurry. One time it was so bad that I ended up having to let the car sit a couple days till it would start up and then it ran fine. Basically you're flooding the car and then also not letting the oil pressure build up so that's why you initially heard the knocking. Fortunately it didn't trip your knock sensor but all should be fine!

 

Coilpack about to go soon imo

 

What makes you think this? A weak spark creating the situation of not being able to burn the excess fuel?

 

No CEL on.... If not, maybe bad gas\ watered down...gas tank water remover might help that or some octane booster

 

Um...no.

 

I think it's a coincidence, and you've got a coilpack that's on its way out.

If that's the case, it might take weeks or months for the problem to reoccur, but it will. And it will be entirely random. Then it will go away for another completely random interval before showing up again, after which the intervals will get shorter and shorter, until it's full-on faulty.

Just because you're not seeing a CEL, doesn't mean it didn't record a code in the ECU. Unfortunately, there's no guarantee whether it did or not, nor whether the code is for a general failure, or will specifically tell you which coil pack created the code.

And unfortunately for the design of your transverse engine, you've only a 50/50 chance that's it's an accessible coilpack.

Frustrating, eh, Mark?

 

Transverse engine eh?
I'll shrug off the arrogance, (kidding, of course), and take it into serious consideration as a previous poster had the same opinion.

 

Thought I'd slip that in. Just for yuks.