Blower changes from vent to floor when accelerating
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Blower changes from vent to floor when accelerating
I have this anoying problem with my 97. When I accelerate the air flow changes from the vent to the floor. The dash control does not change. I assume it is vacuum related. I disconected a vacuum line near the relays that are mounted in the engine compartment. This defaulted to the floor. I don't know what that told me, besides it being vacuum related.
I have changed most of the vacuum hoses and fitting on the engine. But not all of them. I just found a tank :?: under the front right fender that might have a loose fitting.
Any thoughts would be apprecitated.
p.*. I suffer from the chugging and surgging problem, and have apprecitated the discussion on how to resolve this problem.
I have changed most of the vacuum hoses and fitting on the engine. But not all of them. I just found a tank :?: under the front right fender that might have a loose fitting.
Any thoughts would be apprecitated.
p.*. I suffer from the chugging and surgging problem, and have apprecitated the discussion on how to resolve this problem.
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That seems logical. They tank you refer to, is it the same thing as the "tank" that I have located in the right fender under the battery? This tank has only 1 line going to it.
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In my signature picture, it'* on the firewall in front of the driver. Between the maxifuse relay center cover and the windshield wiper motor. It'* black, and actually looks like part of the maxifuse relay cover. But it'* actually a vacuum accumulator. You'll see the vacuum lines going to it.
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Originally Posted by string
That seems logical. They tank you refer to, is it the same thing as the "tank" that I have located in the right fender under the battery? This tank has only 1 line going to it.
Since your problem only occurs during acceleration, you're losing more than the usual amount of intake manifold vacuum, more than the booster/reservoir can cover for short periods of time. If you haven't got a partial leak in a vacuum line somewhere, you may have a partially-blocked exhaust (e.g. a partially-clogged catalytic convertor), and excess backpressure is killing your intake manifold vacuum.
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When you mentioned that you changed the "fitting" on the motor, were you talking about a 3-way nipple with a canister (bulge) in the center? That'* a vacuum check valve, if that goes bad you lose you vacuum on acceleration... If you haven't yet tried a new one I found one in the "Help" aisle at Autozone, around $4.
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I have been kicking around the idea of a plugged cat for some time now.
I am familiar with the vacuum canister on the older bonnies, and can identify it in Willrens photo. On my 97, in that location is an electronic criuse control module. I believe the vacuum canister on mine is under, and I do mean under the battery. Accessible only from under the car on the passenger side.
As far as the "fitting" I replaced, I meant fittings. I have replaced most of the fittings that connect from the hard lines to various components.
I am familiar with the vacuum canister on the older bonnies, and can identify it in Willrens photo. On my 97, in that location is an electronic criuse control module. I believe the vacuum canister on mine is under, and I do mean under the battery. Accessible only from under the car on the passenger side.
As far as the "fitting" I replaced, I meant fittings. I have replaced most of the fittings that connect from the hard lines to various components.
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Fixed!!!
I spent about an hour with a vacuum pump. Started at the vacuum canister and worked my way back to the Y for the line to the dash. There was a small hole in the hard line running under the batery to the vacuum canister.
I spliced the line with the correct size of flexable tubing and have not had an more problem with the changing vents.
I spent about an hour with a vacuum pump. Started at the vacuum canister and worked my way back to the Y for the line to the dash. There was a small hole in the hard line running under the batery to the vacuum canister.
I spliced the line with the correct size of flexable tubing and have not had an more problem with the changing vents.
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