Question about 1992 Pontiac Grand Prix

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Firewall has rotted out ? Need a solution. - 1992 Pontiac Grand Prix

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Buy some thin sheet-metal and cut the rusted places out and rivet it in. Tim

Posted on May 29, 2011


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Defrost does not work but the heat goes to the floor only

check the plastic vacuum lines that control it.... many find the problem is the soft dry rubber that connects the plastic tubes has rotted and leaked.
colors for the tubes are yellow, red, white, and green, but vary from car to car.
They connect behind the control and go under hood/pass side near the firewall.

Dec 10, 2012 | 1991 Cadillac Brougham

1 Answer

Water under pasenger side carpet not from heater core

Find the drain for the A/C located under the hood, firewall, nearest the bottom of the firewall. It will be a black tube and if plugged, the condensation from use of the A/C (which also turns on when the defrost is used to evaporate moisture) will back up into the blower box and drain onto the floor. Long term effects include; rotted floor board, mildew, shorted blower motor and loss of effective defrosting, heating and cooling. Use a coat hanger or other long thin item to clear the drain and allow the water to drain. The system will be much more efficient. Let me know if you need anything else.

Nov 08, 2010 | 1999 GMC Jimmy

1 Answer

I have a 99 dodge caravan . it leaks coolant from the back side of the engine onto the trans ,but i can't see where its coming from?

It's probably coming from a heater hose that goes into the firewall, if no hoses in this area, you probably have a leak in the head or freezeplug has rotted out and leaking.

Oct 19, 2010 | 1999 Dodge Caravan

2 Answers

I have an 89 sc that idles between 2,500 and 3,000 rpm what is causing this

The idle air control is sticking or the throttle position sensor is out.

Apr 18, 2009 | 1991 Ford Thunderbird

1 Answer


Check the braided groundstrap that goes from the firewall to the engine on the passenger side of the engine compartment. I bet its rotted off!
Norton 57!!!

Oct 30, 2008 | 2004 Ford Taurus

1 Answer

1994 chev s10 . the air condition vents in the mid dash does not work properly. the air is ok but comes out of the heat vent at bottom. after a while, it will start puting out some air in the mid vents but...

check underneath you hood, on the driver's side, there is a little ball lookin thing. there should be a long skinny hose that connects to it. if it is rotted out or has a leak, your vents will not change over because they are vacuum powered. the vents switch by using the vacuum coming from that long skinny hose. check the entire hose because it splits off into many other things and runs from the little ball thing under the hood on the drivers side and runs along the firewall toward the passenger side. mine is starting to rot and i need to change it as well. any kind of little vacuum leak from that hose will either make your vents move slowly or not at all. im not a gm technician, but i did replace the head on my 2.2l 94 s10 with a Chevy tech. he noticed that those particular hoses on my truck were dry rotted and told me what they were and what it did. like i said, the hose will start at the ball looking thing under the driver's side of the hood, run down behind the plastic piece thats on top of the brake booster and run along the firewall towards the passenger side. you can just get new hose from autozone or carquest and cut it to your lengths, as long as its the same size width wise (or thickness). good luck. its really not a big deal, and its a good place to start and see if it helps.

Aug 10, 2008 | 1994 Chevrolet S-10

1 Answer

Leaking coolant

need to check the color of your oil. most causes of this kind is rotted out extender pipe from the water pump to the radiator hose connection

Aug 03, 2008 | 1999 Mitsubishi Eclipse

1 Answer

My 95 cavalier Z24 starts but cuts off after 1 min.

Code P0108 is a MAP (manifold absolute pressure) sensor error.

It is either mounter directly on the intake manifold, or on the firewall.

If it is on the intake, the o-ring may have failed.

If it is on the firewall, the rubber vacuum hose may have dry rotted or just have fallen off from either the sensor, or the intake manifold vacuum fitting.

The sensors themselves very rarely fail.

Your sensor will look like one of these:


Jun 06, 2008 | 1995 Chevrolet Cavalier

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