How is the fuel pressure regulator? Hopefully clean and dry at the vacuum end
regards

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mark

Time to start working on this again.

Got a compression tester from harbor freight as it is pointless me replacing fuel items without knowing if the overheating incident caused any dead cylinders....Doubt it, but I don't want any guessing.

Done one cylinder so far, will do the rest later, but wanted to post this question:

When I first did a compression test back in 2009, I had 185psi on cylinder 1, I now have 174/175psi.



Question: Now -- When I did it in 2009, I did not open the throttle, so wondering how much that influences readings? This time I did open throttle. Held it open with screwdriver.

Question 2: Any hints from spark plug for rich/lean? Or does it look about normal?


Slightly yellowish on the top...Picture looks more white, but its more of a yellow color.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

Cool. Here's other 5 cylinders. Looks like my power problem is fuel system related alone.
At least this puts my mind at rest....
Compressions #'s look great











So totaled up:

#1: 174psi
#2: 175psi
#3: 175psi
#4: 170psi
#5: 173psi
#6: 180psi

All cylinders less than 4% variance.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k