The solution can be as simple as disconnecting the battery for at least an hour, having the dealer reset the computer, or, in extreme cases, replace the throttle bodies. Also, the cleaning procedure may be best left to a qualified technician. It has been recommended to simply wipe inside the throttle body every 12,000 miles, and never to touch the flap inside. While it is trying to change settings, the idle will bounce from low to high, and the car will surge forward at times. When the carbon is cleaned out, the ECU now registers too much air, and cannot adjust back to the original settings. An ignition relay costs 5 to 50, and labor costs 10 to 50. The vehicles computer reads this decrease in air volume, and adjusts the throttle body settings to maintain the proper engine idle speed. The average ignition relay replacement cost is between 15 and 100, depending on the car model and labor costs. The ignition control module (also known as the igniter) is OK. This result also tells you three very important things: The crank sensors (there are 3 inside the distributor) are functioning correctly. This is the correct and expected test result. The cause is normal ECU adaptation: When the throttle body builds up carbon, the rate of airflow is slightly decreased. Here are the most common causes of a no-spark result: CASE 1: Spark was present in all 4 cylinders. ![]() After cleaning the throttle body, many owners notice a very high idle, erratic (bouncing) idle, and unpredictable power surging. I would consider replacing the coil though because you will probably improve your mileage. Your higher readings on the coil can reduce the spark intensity but they dont cause the engine to stall. Symptoms of a faulty camshaft or crankshaft sensor are poor fuel economy, stalling, difficulty starting when hot and finally, a no-start condition.The throttle body for the Nissan Altima is known for carbon buildup, and requires regular, light cleaning to maintain peak performance. The transistor heats up and opens the circuit internally. TEST 3: Making Sure The Ignition Coil Is Getting Activation Signal. TEST 2: Testing The Power Transistor's Triggering Signal. Surprisingly, the car may still run, albeit poorly with only one of these sensors operational, as the single functioning sensor will compensate for its failing sibling. TEST 1: Making Sure The Power Transistor Is Getting Power. ![]() When present, these codes denote that one or both of the sensors are not communicating with the PCM. If you do not get any light strobes, then there is a problem with the primary side of the ignition (ignition coil, power transistor, etc.) Otherwise, you have an issue with the distributor cap and rotor, or the engine timing. The check-engine light is commonly (but not always) illuminated, indicating that a code P0340 and/or P0335 is stored in the powertrain control module (PCM). Set the ignition switch to START and you should see the light strobe from the timing light. ![]() The engine's crankshaft and camshaft sensors employed on your car are identical and problematic. KSU Compatible With Ignition Coil Pack for Nissan Altima Cube. The symptoms you describe suggest a familiar failing part used on many Nissans in both its four- and six-cylinder engines. Ignition coil (with power transistor) and spark plug. Could it be something wrong with the fuel filter, lines to fuel or injectors? – William It doesn't do it all the time, but when it does, it won't start until later. ![]() Sometimes when I try to start my 2006 Nissan Altima SE, it makes a skipping sound like it isn't getting gas – and just keeps turning over, but won't fire up.
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