Double Nickels

Nice color. My ex hated white.

Good find. Good call tearing everything out. Good that there wasn't corrosion. Who knows what chemicals they spilled.

New Coke is back on the shelf. Saw that story on the news.

Count me out. Don't know what subreddit is.

OEM plugs are .50 gap. Your new plugs are .52. Rule that out. As I was looking, I see that Autolite plugs are $4, and there is a $3 rebate. I found this online: Low Fuel Pressure– If there isn’t enough fuel getting to the engine, this will cause combustion to be less than optimal. Diagnosing low fuel pressure can be tricky. Typically, if you do have low fuel pressure, the vehicle will act fine when it doesn’t need a lot of fuel. But, it’ll sputter and act like it’s going to die at speed or under heavy acceleration. Here’s some information on how to tell if you have a bad fuel filter. Vacuum leak– If your Focus has a vacuum leak, it can be very difficult for it to get the right air/fuel mixture. This will cause the cylinders to misfire and it’ll throw the P0300. Also, since a vacuum leak almost always affects each cylinder the same, you’ll typically get P0300 with it and not any cylinder specific misfire codes. Here’s a great article from Popular Mechanics on how to detect a vacuum leak. It’s easy (and kind of fun) to chase one down. Popular Mechanics: How to find a vacuum leak. EGR Problems– If the EGR system is not able to recycle the engine gasses right, it’ll throw P0300. Ignition Problems– Bad plug wires (if equipped), bad coil packs, and spark plugs can cause misfires to occur. This isn’t higher on the list because typically you’ll get a misfire in one cylinder specifically, and not a P0300 only. If you got a P302 or something similar with the P0300, it may be a good idea to check and see if there is any damage or failure from your ignition components. Here’s how to test a coil pack, how to tell if a spark plug is bad (video), and how to test plug wires (video). Cam or Crank Sensors– This one is very unlikely, but it does happen. If the ECU is not getting the right signal from these sensors, the vehicles timing is not going to sync up and it’ll misfire. Low Compression– If you have a leaking head gasket, bent valve, cracked head, etc.. that would cause compression to not be as high as it should, you’re going to get P0300. You should also feel the vehicle is down on power as well. Most Common P0300 Fixes A lot of the time, P0300 is going to be fixed by something obvious, such as an EGR leak. When it’s not glaringly obvious what is wrong, a tune up is a great place to start.

An oscillating tool would probably work well for cutting out the panel.

$4O for 6 gallons is unbelievable.

Changing the plugs did not correct your malfunction. Maybe compression. Maybe COP. Maybe some more diagnostics is called for.

If I pull plugs, new plugs go in. Same way I am not draining transmission fluid to send in a few ounces for used oil analysis, pour it through a coffee filter in the funnel, back into the transmission. Same thought process for changing the oil filter with the oil. Bizarre that some people will change the filter, not the oil, and just top off because the bottle of oil claims XX,XXX miles. Or changing the oil, but not changing the filter, because filter advertisement claims XX,XXX miles. Some people drain radiator fluid, then pour it back in through a funnel with a screen. Not just reading it online. I have seen all this in real life.

Poste en Français. Google se traduira.

For me, shipping and tax comes to $101.78. Once you crack the seal, it's exposed to oxygen, hydrogen, and ultraviolet light. How long can you store it after opening? I will need 4 years to use the entire container. Same reason why I don't buy 5 gallon buckets. I worry about degradation, oxidation, and elements out of suspension. And I don't want to pick it up, tilt it to pour into the engine, and all of it pours out too fast to stop. Then there's controlling the pour to get the right measure. 5 & 6 gallons is a lot of weight. The oil packaged in 6 quart boxes has my attention. That's good for when the 5 quart jugs aren't enough.

What combination of spark plug tools and extensions did you use? Any reason why you chose that brand and model of spark plug? Did you replace the COP?

A lot of factors. Fitment. Cost. Safety. Compromise. Sales. 3/4-16 is a very popular thread size. FL910S fits where the FL1A and FL400S will not fit. On a Focus, a FL400S has a very real risk of being crushed or broken off if the car bottoms out. The smaller filter will also fit on a lot of cars from other manufacturers. A lot new Ford cars are now using FL910S. Must be easier for the factories and dealerships to stock 1 part instead of 3. Nothing new uses FL400S or FL1A anymore. Most new Ford cars are FL910S or FL500S. Pics all over the internet show side by side 400 & 910 cut open. They're almost identical. Then you discover that the old style FL400S with the taller can is favored by Jeep owners over the Mopar filter. I am looking at the GM ACDelco version, with the 4.75" canister, like how FL400S used to be about 10 years ago. Rock Auto has a bunch of clearance filters for 3/4-16 thread pitch, for about $1. The Champion Labs PH400 is awesome for $1.10. I think that the Ford engineers know that full synthetic oil with a more robust additive package and better filtration can benefit. The engineers also know that better quality parts in every way, could result in a better made vehicle. The car we get is not engineered to be the best. Otherwise, there wouldn't be the issues related to TSBs, Recalls, law suits.... The marketing department and accountants have to position the car into a market price segment, and make a profit. Corners are cut. Otherwise, we would all be driving "the best". Just think of the current dual clutch transmission fiasco. No way the engineers knew what they were doing with that one. Or the engineers knew, and the accountants overruled them.

I guess every year, about this time, motor oil goes on sale and a lot of rebates are available. There's a $5 coupon @ Walmart for Mobile 1, then you get a $12 rebate. O'Reilly's has a $10 off $20 coupon. Shell Rotella Gas Truck has a $10 rebate. Havoline is a $5 rebate. Pennzoil is $10 rebate. 5 quart jugs for the name brands end up cheaper than Supertech oil. Even oil filters are lower in price.

It helps to have a jack capable of lifting higher and jack stands able to support the car at a higher height. Nothing like a jack only getting up to 14", then lowering back on jack stands about 11" or 12". A foot off the ground is just not enough space to crawl under a car and work comfortably.