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trinogt
Well-Known Member
In my last post here in this forum, I had some heating problems, among other things...
I had a hunch today, so I dropped the glove box and had a look at the blend door. No matter what function I put the climate control knob on, the blend door never opens, whether the engine is cold or hot! I took a look under the hood and found a vacuum hose that is severed, probably a casualty of the engine swap the car lot did... Those plastic lines are quite fragile when old in Florida, as I experienced a couple days ago with my Thunderbird, when I snapped a similar line while removing the cowl to replace the power brake booster. Figured out on the first drive that the a/c would only blow out the defrost vents and nowhere else, so that line operated the climate items. Replaced it with a piece of rubber line and all is well.
I plumbed a rubber line to this broken line and ran it to a vacuum. The blend door opens! But it stays open all the time, no matter what setting, so there must be a vacuum switch somewhere that this line was supposed to run to, but I can't find it.
Here is what I see, if someone could PLEASE check their truck and look at what I see:
1998 Mazda B2500 SE
Under the blower motor (under the hood), there is a connector. Two vacuum lines come out of this connector, a black one and a grey one. The black one runs to a location underneath the washer and coolant reservoirs, pretty much in between them because you can tug the line and see it, and disappears somewhere under the fenderwell through a hole.
The grey vacuum line is the one that is only about a foot long, and it is broken there. I have no idea where it is supposed to go, and if there is a matching end for it, I can't find it, and that would likely mean a small vacuum leak on my engine.
If someone with a similar truck (Ranger in the same year range, '98-'01 might be the same) would care enough to look under their hood, I would greatly appreciate it! I can take a picture if you like.
Thank you,
Mark
I had a hunch today, so I dropped the glove box and had a look at the blend door. No matter what function I put the climate control knob on, the blend door never opens, whether the engine is cold or hot! I took a look under the hood and found a vacuum hose that is severed, probably a casualty of the engine swap the car lot did... Those plastic lines are quite fragile when old in Florida, as I experienced a couple days ago with my Thunderbird, when I snapped a similar line while removing the cowl to replace the power brake booster. Figured out on the first drive that the a/c would only blow out the defrost vents and nowhere else, so that line operated the climate items. Replaced it with a piece of rubber line and all is well.
I plumbed a rubber line to this broken line and ran it to a vacuum. The blend door opens! But it stays open all the time, no matter what setting, so there must be a vacuum switch somewhere that this line was supposed to run to, but I can't find it.
Here is what I see, if someone could PLEASE check their truck and look at what I see:
1998 Mazda B2500 SE
Under the blower motor (under the hood), there is a connector. Two vacuum lines come out of this connector, a black one and a grey one. The black one runs to a location underneath the washer and coolant reservoirs, pretty much in between them because you can tug the line and see it, and disappears somewhere under the fenderwell through a hole.
The grey vacuum line is the one that is only about a foot long, and it is broken there. I have no idea where it is supposed to go, and if there is a matching end for it, I can't find it, and that would likely mean a small vacuum leak on my engine.
If someone with a similar truck (Ranger in the same year range, '98-'01 might be the same) would care enough to look under their hood, I would greatly appreciate it! I can take a picture if you like.
Thank you,
Mark
