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Jeeps stalls at traffic lights - 1979 Jeep CJ5
From the description it almost sounds like an air/fuel mixture issue. Possibly caused by unmetered air being sucked in at closed throttle. The vacuum system should be checked along with the intake manifold gasket. If no leaks are obvious, a...
Gear for power fuel. 1979 Chevy K10
Hello. Thanks for writing in about your 1979 Chevy K10. The best gear set to get for the best power and mileage would be 4.56 gears. That would be the best for this size tire. Just be sure to go...
Odometer not working
The speedometer is calibrated to read the correct miles per hour and distance driven at the speedometer factory. Are you sure you misread the odometer to be 1.2 miles and not 12 miles? If the far right number is a...
Exhaust sound
The leak at the header flange before the muffler can cause different types of sounds at different RPM's of the engine - kind of like a music horn or flute. As air is blown past a hole, it will make...
Bench testing the wiper motor - 1979 Chevrolet C30
Many part suppliers can provide wiring diagrams for older vehicles like your truck - Autozone for example has these on their web site. The wiring diagram may provide enough detail on the power path in each wiper switch position to...
no power from coil to distributor
The ignition module on the fender should be looked at to see if it has ever been replaced. These modules on the fender go bad all the time. Try to disconnect and reconnect the connection to the module. Test...
Sluggish feel in gas pedal
Hi there, thanks for writing about your 1979 Volvo 244. First, you should confirm there is good spark at the spark plugs to eliminate ignition as a problem. Then, check fuel pressure for the correct pressure - it is likely...
Gas pedal hard to apply, can't go past 55 mph
Hello. It sounds like the transmission isn’t shifting gears properly. A problem with the first, second, and/or third gear can cause difficulty with acceleration. Another possibility is that the catalytic converters are clogged causing poor acceleration. When this happens it...
Car won't start, battery drain - 1979 Mercedes-Benz 450SL
Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator. This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended that...
Revs up and out of control
Hello. The throttle cable could be sticking causing the RPMs to increase excessively if the throttle cable is holding the throttle open when it shouldn’t be. There also could be a bad throttle position sensor or idle control unit. These...
Oil Pressure hot engine - 1979 Mercedes-Benz 240D
Hello. Engine timing and the oil pump work hand in hand. If the timing of the engine is off, then the oil pump won’t work as it should and this will cause low oil pressure. The first thing to do...
brake booster and master cylinder
Your first step is to verify that the parts you purchased are EXACTLY like the ones you removed. It is possible to have a a similar component fit but have the wrong clearance for the brake pedal pushrod. If they...
starter not turning over and is not big engine is a 360
You will need to see if you are getting signal to the starter relay near the battery. This relay will activate the starter solenoid on the starter. The starter motor may stick if you hear it clicking but not turning....
Down one chamber
I owned a 300D and 300SD, both 1983's. You can have a bad glow plug or two even if the glow plug light is lighting when you turn the key on. The easiest way to determine if a glow plug...
Power steering pump pulley
The shaft size and hole size will only be about .003" difference. The shaft if it measures .748" then the pulley hole will be about .745". This way the pulley will press on and be tight. If you need help...
When headlights are on, turn signals do not work - 1979 Ford F-100
If the items share a common ground or power circuit, there could be a loose connection or a bit of corrosion in the shared circuits in the steering column. The cross contact from corrosion growing across circuits can cause similar...
Truck won't shift out of first gear - 1979 Chevrolet C10
Hello. There are several possibilities here: the vacuum modulator valve, the governor in the transmission, or possibly incorrect fluid level in the transmission. If you would like to have this checked, a qualified professional from YourMechanic can come to your...
Truck will not start, but lights still work - 1979 Ford F-100
Considering the loud clicking, have the battery tested and charged just to be sure. A loud clicking from the engine bay is a symptom of a failed or weak starter, low charge on the battery or a grounding problem in...
Car won't start
Hello. It sounds like the engine is not even cranking over. If this is the case then it may need a new battery. I would have the battery load tested and if it is fine then it should be able...
Brake pedal feels hard
It sounds as though you may have a brake hose that has collapsed inside. There are three flexible hydraulic hoses on your car that allow the brake lines to move with the wheels. There are two on the front and...

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