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1972

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Question
Spark plugs in car incorrectly
Have a trained mechanic verify the work done to the spark plugs, and make sure they are in tightly. It is common to get the wires crossed, which could lead to the wrong cylinder being fired at the wrong time....
Question
Vehicle refuses to start.
Fuel supply to the carburetor needs to be checked. The fuel system including the fuel pump and filter will need to inspected is there is no supply at the carburetor. The carburetor may need to be checked for filling as...
Question
Car will not idle.
When dealing with an older vehicle such as this, the most common cause of a poor idle is a carburetor problem. Before condemning the carburetor, the engine should be inspected for any loose or leaking vacuum hoses. The ignition timing...
Question
Brakes no longer working.
If you step on the brake pedal and it feels soft or drops to the vehicle floor, air has entered the system. However, if the brake pedal is hard and difficult to depress, the power brake booster may be at...
Question
Generator light on when engine is off
I had a difficult time finding information on this vehicle because my repair database does not go back to 1972. I found a generator wiring schematic on a website. Hopefully it's correct. The light should come on when the key...
Question
Turns over won't start. 1972 Chevrolet Chevelle
Hello. It is possible that there is a wiring issue, or that the carburetor is actually leaking fuel into the engine which flooded it. I usually pull the spark plugs first to see if they are covered in fuel. If...
Question
Carburetor problem
The carburetor needs a good supply of fuel to keep the engine running; if the fuel pump is not suppling the fuel, or the filter is clogged solid, then fuel cannot get to the carburetor. If fuel is getting to...
Question
Starting, only clicks
The first to do is to make sure the engine turns by putting a socket and breaker bar on the crankshaft pulley bolt and turning the motor. If the motor turns, then you know it is in the wiring. Follow...
Question
Difficulty shifting to higher gears
Hello there. Thanks for writing in about your 1972 Chevrolet El Camino. A few different faults could cause the vehicle to have shifting and acceleration problems. The most common would be the transmission linkage, low fluid level, torque converter, or...
Question
Grating noise and curved tire - 1972 Volkswagen Super Beetle
The problem sounds like there's an issue with the suspension system. A worn or even broken suspension part can cause a misalignment of the wheel and tire assembly and cause the noise. Have the area inspected by a qualified professional....
Question
Brake pedal stuck to floor - 1972 Volkswagen Super Beetle
Hello. There is a return spring on the assembly that must be dislodged or broken somehow, and when this happens there will be issues with the pedal returning. Have the pedal assembly and the hydraulic portion of the system inspected...
Question
Where is the fuse for the water temperature gauge?
There isn't one per se. There will be a fused wire with voltage to the instrument cluster (your owners manual should indicate which fuse), but the temperature sensor is providing a variable "resistance to ground," which the temperature gauge in...
Question
Dashboard gauges don't work
There is still a ground path problem from the engine to the instrument cluster, whether through the chassis or not. Might be worth running a new ground wire directly from the engine block to the ground connector on the instrument...
Question
My blower switch only works on #2 speed & high speed could this be the blower resistor?
Hello there, a few common faults can cause your 1972 Oldsmobile Cutlass to only work on the #2 speed air flow. You are correct, the blower motor resistor could cause this fault. Other likely causes would be the fan control...
Question
Starts runs for 30 sec. Shuts down.
Hello. This behavior suggests that the carburetor needle & seat are sticking, and the carb requires some adjustment and/or a rebuild. These fuel valve components allow fuel pressurized by the fuel pump into the carburetor float bowl (and from there...
Question
Smoke that is not coming from exhaust when going above 60 mph.
Hey there. If the smoke is not coming from the exhaust, it may be possible that the white smoke is coming from oil leaking onto a hot exhaust manifold or another piece of the motor or exhaust. The PCV valve,...
Question
Smelling gas inside and out.
Hi there. Check the connections to the fuel filter. If the fuel filter is not connected properly, then the fuel will leak out. Check the fuel hose or line to the carburetor on the engine. See if there are any...
Question
Loud popping noise where header and exhaust meet
Hi there - the "combustion bang" you hear taking place at the header flange probably indicates a leak at the donut gasket as you suspect. Unburned, or still burning, fuel catches some fresh oxygen at the flange, and ignites, producing...
Question
Backfire
Hi there; In most cases a backfire issue occurs because the air to fuel ratio is too rich, the timing is off (which you've checked) or the spark plug tips have excess carbon build-up (which you've also replaced). Typically when...
Question
How to stop gas leakage from going into carburetor
Hi there. The excessive fuel into the carburetor would account for not being able to drive very far and heavily smoking from the exhaust. Two things come to mind, a sunk carburetor float(s) and/or float needle & seat not sealing....

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