Question about Cadillac DeVille

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2004 deville leaking gas at pump

Replaced gasket , now leaking again after about a month. could bad gas cap be causing too much pressure in tank causing gasket to fail ?

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  • Donald Wayne Brown Oct 26, 2012

    I have a gas leak at my tank where the fuel pump connects to the gas tank . I've already replaced the gasket once and that fixed it for about a month , but now its leaking again ! what could cause this gasket to keep blowing out ? I thought maybe the gas cap was not holding the correct pressure in the tank , but it's my understanding that a gas cap does not go bad in that manor , its my understanding that when a gas cap goes bad it does not hold enough pressure in the tank .

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SOURCE: 2.3l ranger keeps overheating, been through two radiators already.

Hello Ranger Joe, eight months and two radiators is very uncommon. Question, Have you visually confirmed the leak in the radiators or is the leak near the hose connections? Replacing the radiator, cap, water pump, & the thermostat leaves only two others, the hoses and the engine block/heads. Far fitched will be something or somebody poking holes in the radiator.

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SOURCE: My 95 Pontiac Bonneville is not getting gas I've

What you need to do is have an assistant turn the key on (not try to start, just turn the key on) while you have the gas cap removed and your ear down by the gas tank fill tube. When they turn the key on you should hear a whirl only for 3-7 seconds. If you hear nothing more than likely you will need to change your fuel pump. Attempt this test on several tries at different times several hours apart before you **** your tank out to give it ample time to relieve any fuel pressure that may be built up thus causing your pump not to respond. BUT, if you are not getting any fuel you are not getting any pressure built up so it should be making some sound. How many miles do you have on this vehicle? 9 times out of 10, sorry to say, you'll be replacing the fuel pump. It sounds like to me that you have thourouly checked every other possible thing. Good luck my friend. Let us know how you come out.

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SOURCE: 2004 Mazda RX-8 PO455

It will not go off by itself,you will need to reset it by connecting to a diagnostic tool.Once cleared if there is any other problem then it will trigger the check engine light again.Hope this helps..

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SOURCE: 99 deville head gasket leak?

A head gasket leak is usually indicated (among other things) by continous overheating of the motor, and subsequent loss of coolant.
It can also be indicated by the presence of engine combustion gas bubbles in the coolant resevoir.
Ensure the coolant system has no external leaks, such as faulty hose/s, radiator etc.

Ensure motor tune or other motor mechanical condition is not the cause of overheating.
I assume the motor is actually running hot.

Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check/replace the thermostat,
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.

Posted on Sep 21, 2009

Testimonial: "thx..my car is not overheating.only had to pull off road once.it does get to 233 sometime."

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SOURCE: 1990 cadillac deville 4.5l runs rough and

Had a computer on my 1990 Cadillac Deville bad, after changing plugs, wires, cap, fuel injectors, egr valve, etc.

The computer was not firing an injector and i had a miss and rough running mostly at 35 mph on the roads. It bucked like a bull.in a rodeo.

Posted on Jul 02, 2010

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