Vovchandr

If you need any more convincing of what the see through filter looks like I have a few videos uploaded

AGM is indeed Lead Acid family. Don't use Lithium. Lithium is higher voltage, there's no trickle mode which LeadAcid needs and it might overcharge it on Lithium setting. Good call on asking!

This is the way!

So I got an answer to this from an unexpected source ChatGPT helped me out Also seemed very concerned at what my existing map looked like Potential Issues: Flat Spot at Low TPS and Mid RPM: There’s a noticeable valley in the lower TPS columns as RPM increases. This can cause hesitation or lean misfire when lightly accelerating or cruising. Sudden Dips at High RPM: The right side (higher RPMs) shows valleys or even drops, especially in the mid TPS rows. That’s risky—it might be going lean when it shouldn’t, especially on part or moderate throttle. Uneven Surface: The map isn’t smooth—there are abrupt steps or edges. That can lead to unpredictable fueling transitions and poor drivability. In worst cases, it can create resonant surging or cause knock events. Amazing.

I love using mine. Life saver when there's no other option on a cold day. One of the biggest things that makes a 7 better than a bike for transportation. Also on a Zetec it's one of the only sources of heat for passenger. I went as far as trying to make a HVAC tube to channel heat directly to passenger that can be deployed as needed.

Thermostat can be tested by throwing it into boiling water. Coolant system can be tested for thermostat issue by taking it out entirely. Depending on system might be an easy test. Certainly a conundrum

That driveway is begging for donuts Congrats.

Is this the water pump? I'm not sure if you saw references but here are some from the Net Here are two Zetecs which should be similar but flipped Here is a Duratec

I'm pretty "new car" sheltered and love 7 dearly. It's always reassuring to see others share my sentiment even though they have pretty nice new alternatives in the garage (Such as the C8, rented one for a day, what a machine - just not "for me"). Connex is a nice alternative that one doesn't see everyday. I'm personally kicking around the idea of getting a 4 post. Maybe sooner than later with the potential costs going up in this political climate.

I think it really depends on the area. I don't personally have had a lot SUV challengers, nor anybody else really for that matter.

I just realized there's no bleeder on the rad. @SilberCan you show exactly where you bleed the system? I just remembered that vacuum filling is also an option that can be done for those that like a more violent approach. I've never tried it myself yet.

In addition to what everybody else has said here are a few points out of left field as I battled with cooling issues on my Zetec and still do to some degree 1) Is the car stock ECU or standalone? My fuel maps have a lot to do with how the car runs. I'm also running cool as of late and struggle to stay at temp. 2) For any coolant troubleshooting I recommend a see through coolant filter. Makes it much easier to troubleshoot things if you can see the flow/air issues instead of a blind system (different sizes available check yours, this is an example) https://www.amazon.com/Champion-Cooling-Systems-CCHF-1-50-Coolant/dp/B01FXRJ6R2/ref=asc_df_B01FXRJ6R2?mcid=bff87b07fc8b3a6d88619500d17debc6&hvocijid=17731782726575446717-B01FXRJ6R2-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=721245378154&hvpos=&hvnetw=g&hvrand=17731782726575446717&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004728&hvtargid=pla-2281435177898&psc=1 3) I don't believe you have a heater core but a second bleeder is always nice to have on the other end of the car to make things easier. https://www.autozone.com/cooling-heating-and-climate-control/radiator-flush-tools/p/peak-flush-and-fill-kit/525931_0_0?cmpid=LIA:US:EN:AD:NL:1000000:HRD:19489353553&gad_source=1&gbraid=0AAAAADkcoVsIMzvFnhppBa5BdOgRQ_TzF&gclid=CjwKCAjw5PK_BhBBEiwAL7GTPXxrPxxRaZOzotzMxihKuGUHMMFvUu8bo1NBRgUBaPIVdhJPqlltahoCGK4QAvD_BwE&gclsrc=aw.ds 4) Rent a coolant pressure tester from Advance or autozone (free with collateral to borrow it). Gotta make sure system is "snug" before further troubleshooting. You should hold 15 to 20 pounds for hours or longer. Quick and easy test 5) Are you using one of these? They make bleeding a lot easier tool. I had to make an adapter for mine not sure if you'll have better luck https://www.amazon.com/Ultimate-Spill-Coolant-Funnel-Kit/dp/B089YHW5HR/ref=asc_df_B089YHW5HR?mcid=afb6c6b9c9633802bad331df1a0d9588&hvocijid=3054922127020583502-B089YHW5HR-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=721245378154&hvpos=&hvnetw=g&hvrand=3054922127020583502&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004728&hvtargid=pla-2281435181178&psc=1

It works the same way as to why window salesmen won't leave your house after an estimate without making a sale no matter how cheap they have to go. I assume you have prime to qualify for these offers so they already are having monthly indefinite payment out of you as long as they keep you happy. Early AM truck is already paid for and will be going out regardless whether you ordered or not and will very likely be by your area for other houses. They do use a lot of robots in packaging but I'm not sure on the details for what goes on inside the warehouse. Keeping you as a customer and keeping the habit of you coming back is worth a loss even if they happen to acquire one for some purchases. Loss leaders are a thing that enormous corporations can afford to keep customers. Getting new customers isn't free either, advertising is an enormous cost that they pay even if they are the leader in the market. Final note is I don't even believe Amazon store is their big profit area. I believe AWS (amazon web services) is one of the biggest incomes, among God knows what else they might have their hands into that could be quite lucrative.

Fair guess, but my gauge should be solid 40 while running, which is target and I've replaced many lines since purchase. I dont think a leak is my problem. Certainly shouldnt affect only one cylinder.

True, but diagnostic tools are good to own, especially with a number of vehicles between myself and my family. Depending how hard it is to setup might be a good thing to run/test and clean every once in a while.