What causes a car to lose power at the spark plug?
This is a wasted combustion cycle where no power is generated. Ignition coils and spark plug wires convert the low voltage power from the battery into the high voltage necessary to jump the spark plug gap. As ignition coils and wires wear, they may lose insulation and short out.
What causes a check engine light on a purge solenoid?
If the computer detects any problem with the purge solenoid circuit or signal, it will set off the Check Engine Light to alert the driver that a problem has occurred. A Check Engine Light can also be caused by a wide variety of other problems, so it is recommended to have the vehicle scanned for trouble codes to be sure. 5. Low Fuel Economy
Can a bad canister purge solenoid cause poor gas mileage?
Poor gas mileage is another sign of a [&failing&] [&canister&] purge valve. The [&fuel&] [&vapors&] your car usually uses for combustion [&will&] end up vented through the EVAP [&canister&] instead. Instead of reaching the combustion chamber, gasoline gets burned up before it engages in the combustion process.
How much power is lost in a 10 volt cable?
If it is 10 volts for a current of 10 amps, the power lost in the cable is 100 watts. Larger cables have less resistance per foot than smaller cables. Typical household wiring is AWG 12 or 14 gauge with resistances of 1.6 and 2.5 ohms per 1000 feet. For a typical residence, a run of cable might be up to 50 feet.
How does the length of a cable affect the power drop?
Basics. Electric cables have a resistance per foot, and the longer the cable, the larger the resistance. When current flows through the cable, the current flowing through the resistance results in a voltage drop according to Ohm’s law, voltage = current x resistance. Power in watts is voltage x current.
What causes a no spark or loss of power condition?
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap. Sometimes, misfiring may not be caused by a total loss of spark but by incorrect sparking or by high-voltage electrical leaks.
Why do I need to replace my spark plug wire?
The following situations call for immediate replacement of spark plug wires: Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug. This causes an increase in the voltage required to fire the spark plug, which could damage the ignition coil as well as the spark plug wires.
What are the symptoms of bad spark plug wires?
This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc.) and electrical stresses. Common signs of failing spark plug wires include a decrease in power, acceleration, and fuel efficiency.
This is a wasted combustion cycle where no power is generated. Ignition coils and spark plug wires convert the low voltage power from the battery into the high voltage necessary to jump the spark plug gap. As ignition coils and wires wear, they may lose insulation and short out.
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap. Sometimes, misfiring may not be caused by a total loss of spark but by incorrect sparking or by high-voltage electrical leaks.
Why does my car run slow with no power?
If your oil is old, dirty or thick, this may cause the engine to run slowly and not be properly lubricated. Not only is this not ideal for your engine run quality, but this may also damage internal engine components. Adjust the carburetor’s choke lever — it may be closed or partially closed.
What happens when you press down on the gas pedal?
Engine response is inconsistent When you press down on the gas pedal, your engine should respond directly and instantly. However, when a problem with the APP sensor exists, the vehicle’s ability to consistently accelerate or decelerate as directed by the driver is reduced.
Can a bad throttle position sensor cause idle surging?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light
What’s the problem with the transmission on a Pontiac Grand Prix?
Once the transmission gets warm, it revs engine and shifts hard through 1st, 2nd and 3rd gears. Once a speed of 45mph+ is reached the car is fine. Solution, replacing solenoid and having the valve checked out at as well.
Why does my Pontiac Grand Prix go backwards?
If you are on a hill it will drift backwards. If you shut it off and wait a while and restart the car and put in gear it will engage but doesn’t have much power. Could that be the transmission going bad!!
Is there a problem with my 2005 Pontiac Grand Prix?
We found 32 RepairPal Certified shops near you. Here’s a few you can book directly with. 2005 Grand Prix started jerking before the gear would engage and now you put it in a gear and push on gas peddle and it won’t go anywhere in any gear.
How long does a Pontiac Grand Prix shift hard?
Car shifts hard from 1st, 2nd gear, stops once 40+ mph are reached. Can let the car sit for 2 to 4 hours and it will not shift hard again.
When do you need to replace ignition components?
Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs).
What’s the best way to tighten a spark plug?
Back out the spark plug a little so you can turn the plug by hand. Now tighten the spark plug until it bottoms out by hand. Use a ratchet and socket to tighten the spark plug a quarter turn or until it’s snug. A quarter turn would be for example turning the ratchet handle from the 3 o’clock position to 6 o’clock.
Can a worn out spark plug cause a faulty ignition coil?
Worn out and faulty spark plugs can also put excessive pressure on the ignition coil, causing damage to them. You should check the ignition coil regularly to ensure they are in good working condition. A faulty ignition coil will not provide enough power to the spark plugs to start the engine.
When to replace spark plugs but still misfires?
It is also possible that one or more of the new wires or spark plugs is defective. When you perform a maintenance function and the car runs worse after, you have to review the maintenance function first. If you replace the wires, it is often also a good idea to replace the cap* and rotor* because they age similarly.
What to do if your spark plugs don’t work?
Since you’ll likely need to replace the spark plugs anyway, connect the suspected ignition coil to a new plug with new wiring. If it still doesn’t fire, it’s the coil. Or, simply unplug the wires from each cylinder one at a time. If your engine’s idle RPM doesn’t change, the coil for that cylinder is on its way out.
When to replace the spark plug wire in your car?
Be sure to first check spark plug wires for visual damage. Look for any signs of melting or cracking. The following situations call for immediate replacement of spark plug wires: Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug.