rebuilding engine, need some info/advise!!
#19
Big time short circuit, most of the bonding wires on the bottom are toast. Can you post a closer view (with some light) of the discolored area and the bottom bonding wires ?
Also, check your power and ground connections to the MAF to see if you have any issues. To have that type of short takes a fair amount of power and the only connection to the MAF with power is the +12V lead.
Also, check your power and ground connections to the MAF to see if you have any issues. To have that type of short takes a fair amount of power and the only connection to the MAF with power is the +12V lead.
#21
Much better. The bonding wires look OK so it wasn't a short circuit or they would be melted. Without a schematic I am guessing but it looks like a cap went resistive and overheated the conformal coating which caused it to turn yellow. You can see the burn marks by the component (little brown one with endcaps) so it slowly cooked itself. Not a uncommon failure but it a shame it happened to you. Might want to check with John to see what the vendors warrantee is for that part.
#22
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Based on this picture of the MAF, I'm surprised the car even ran! Forget about the car being lazy..
I wonder if water got in somehow!.
I would not plug this MAF back into the harness.
I wonder if water got in somehow!.
I would not plug this MAF back into the harness.
#25
Well I was leaving for work about a month ago and had to run back in the house. When I came back out to the car the top of the sensor was on the garage floor?!? So I covered it with some exhaust tape. It looked like that since then.. That was about a month ago.... I drive it everyday
I guess I need a replacement?
I guess I need a replacement?
#26
Yup, needs to be replaced.
This board has a thick coating of water/mold protective called conformal coating. My guess is a passive part went resistive and burned the board and melted all of the conformal coating around the part. In the black square you can see were it burned the board and melted off all the coating. It appears to have flowed with gravity (see the big glob in the red) and this is related to how the MAF was clocked on install. The yellow area is were the hot liquid coating flowed over the board. A board will work with some parts missing, just not as well as when they are all there.
This board has a thick coating of water/mold protective called conformal coating. My guess is a passive part went resistive and burned the board and melted all of the conformal coating around the part. In the black square you can see were it burned the board and melted off all the coating. It appears to have flowed with gravity (see the big glob in the red) and this is related to how the MAF was clocked on install. The yellow area is were the hot liquid coating flowed over the board. A board will work with some parts missing, just not as well as when they are all there.