94 taurus vacuum hose problem

Put a small hose clamp on it.

The hoses are silicone. Although very durable they sometimes get soft and lose their "grip". There is a slight amount of pressure in them. Try replacing the hose, I would suggest both. Don't use regular rubber tubing, it won't last 10 minutes. The silicone hoses is pricy compared to regular hose and used to be a dealer only item. I'm sure that parts stores carry it by now, but maybe not.

Spend $17.00, then you have a way to test.

IIRC that hose is not only silicon but VERY THICK. I seriously doubt you could get it anywhere but the dealer. I forgot to add, get a clamp made for silicon, it will not have the grooves in it for the screw, it will be smooth all the way around on the inside. OR just use a nylon wire tie, that would probably give you the extra little grip it needs to stay on.

I hose clamped it on and the hose exploded. I guesse I have excessive exhaust back pressure. I really don't understand it, though. I've been through plugged catalytic converters before and the vehicle lost power. This car has not done that and is, in fact, running well. The only problem seems to be that this hose won't stay put and when it is disconnected, the car doesn't run quite as well as when it is connected. (oh, and it is quite noisy when it is disconnected).

omg your kidding!? exploded? maybe it was split already and thats why it wouldn't stay on?. does it go to the exhaust or egr...refresh my mem plz. does it make load noises at idle too? or just going down the road?

There is a metal pipe (maybe three quarter inch tubing or so) leading from the fuel injection to the exhaust manifold (or maybe it is from the exhaust to the fuel injection?) In that pipe is a smaller pipe with a bulged nipple. On that is a rubber vacuum line that leads to the DPFE EGR Sensor (this is not to the EGR Valve but two feet away on the pulleys side of the motor) That wont stay connected to the smaller pipe with the bulged nipple... and that is the rubber vacuum hose that burst when clamped.

It's only noisy when accelorating. In fact, it is almost impossible to make it noisy when revving it in park. It has to be under load (transmission engaged and accelerorating) to make it noisy.

The hose was in good shape before it exploded. I had it off the car and looked it over thoroughly.

Finally, I happen to own two 94 Taurus's. One is the wagon that is having the problem and the other is a sedan with the same 3.0 motor. I inspected the rubber vacuum hose on both vehicles and both are equally "loose" on the nippled pipe. Neither had any sort of a clamp holding the vacuum tube to the nippled pipe but both have a clamp holding it to the DPFE EGR Sensor.

That sure sounds like high backpressure in the exhaust. I would think you would also have other drivability concerns though. ??? I was thinking plugged EGR port, but even then.....naah. Let us know what you find out.

It was the catalytic converters. I guesse enough exhaust was blowing through that little pipe that the motor could still breath enough to run well.

The rear converter was severely restricted, but the front one wasn't all that bad. - Anyway, problem solved. Thanks for the replies.

cool, does the car seam to run any different? just curious.

Not really. The car ran great even with a plugged catalytic converter due to the leak allowing the exhaust a place to go. I thought it would perhaps be a little more powerful now that it is unrestricted, but I can't notice a difference.

Keep in mind that this is a wagon with a 3 litre V6, so it wasn't the most powerful feeling of vehicles to begin with. It has never been what I would call "snappy".

Before driving the tauruses I have now, I owned a 1972 Olds Delta with a 455 and a 1972 Mercury Comet with a 302. Going from big old V-8 motors to six cyllinders was sort of a shock I've never quite recovered from. - That comet was indeed "snappy" and though the Olds wasn't "snappy", it was incredibly powerful in comparison to these Tauruses.