Ok. So the bad head had a run for 1.5 years -and the good head only had production for 1/2 year- wow.
No wonder that little head is pricey- not way common.
Kinda sad, It’s been pulling 35 mpg last 3 tanks before this mess started. Then again, I pulled a hamstring standing up out of it- haha.
For the combustion tester btw, I got the U view 560000. $59.36 & Free shipping. It does gas and diesel. Fluid didnt change at idle, so I drove around the block and got it hot. Then after 3-4 bulb pumps went from blue to green. This tester is different than others I’ve used. Instead of 1 chamber for liquid it has 2, 1 above the other. This causes you to draw through both to help eliminate a false reading. Also to help you buy fluid twice as often- haha.
But mine was used when I opened it (from amazon). I thought someone did a test then just returned it being sneaky, but I filled the lower and then went to fill the upper and it leaked right through the brass fitting- new defecive and why the other guy returned it. I was able to test with just one section, so got my answer. But will be calling company on Monday and have them send me a new middle piece. If they don’t I will just return it all as defective for a refund. The amount of fluid the other guy used was like a dollar so I don’t care about that. More annoyed that they obviously shipped out a returned damaged item.
New parts (and tools apparently) don't mean good ones, right? Even so, the fluid works perfect, and not all do for diesel so I would recommend it for others if they need one.