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17

This comes directly from this web site: http://www.obdii.com/articles/Onboard_Diagnostics_Demystified.html What it says, is that early OBDII systems could not detect misfires, but since then a few variations on the theme have been implemented. The basic idea is that if a cylinder fires, it gives a kick to the crankshaft causing a slight variation in crank ...


14

Ants are unlikely to be the source of your issue. Your battery is filled with sulfuric acid, and that is sufficiently strong enough to completely dissolve any ants that made their way into your battery. Above that, your battery should be completely sealed. Also, even if the ants did manage to get into your engine: metal > ant. This issue is more than likely ...


11

I'm sorry if this ends up being a lengthy answer. The answer to this question is more historical than anything else but first a little background. In a waste spark system an ignition coil has two spark plug outputs unlike every other system only having one. Each ignition coil is hooked up to two spark plugs. These spark plugs reside in two opposing ...


10

From personal experience, I'd replaced ALOT of these working at the dealership. It wasn't just the accords either, it was quite a few Honda and Acuras that used the same design and power delivery system. The most common issues I saw out of probably close to 100+ failures of these was: Ground strap on the starter becoming corroded. Bad ground to engine ...


10

You have a qualitative description of what happens, but let's break it down to a smaller scale. When we talk about "temperature" of something, we are really talking about how fast the molecules are moving around and bouncing off each other. "Temperature" is really "kinetic energy". And it turns out that there are other types of energy besides moving around ...


8

First, think of the possible failure modes: Spark plug is clogged with carbon or has an isolation error - it conducts current, but doesn't generate sparks, because the current flows through the carbon from electrode to electrode. Break inside the plug, e.g. broken / worn electrodes - plug doesn't conduct (and of course doesn't generate sparks) Cable has a ...


8

Repeated clicking is a result of not enough power making it to the starter. Your battery either has a bad connection, or is too weak to turn the starter motor. Battery Connection Your problem may be entirely due to a bad connection. Starters draw a lot of amps, and batteries are weaker in cold temperatures. I'd start by fully exposing the terminals. You ...


8

Engine misfire can also be detected by looking at the coil voltage just after the plug is fired .When the fuel/air mixture actually ignites there are lots of ions and radicals floating around .This provides an easier path for electricity from the coil.If the mixture does not ignite for any reason the resistance is extremely high .A observant auto tech ...


7

This is usually the symptom of a dead battery. Has the car been sitting for a long time without being driven? Or did you leave the headlights or interior lights on? Try jump starting it (see owner's manual for instructions) and drive it for a while to charge the battery. (I usually find that 30 minutes or so of driving is sufficient; make sure not to switch ...


7

In the dawn of fuel injection most cars used a simultaneous double fire system. During every crank shaft revolution the injectors spray half the fuel needed. This way half the fuel waits on top of the intake valve. When the intake valve opens the first half is dumped in and the injector sprays in the other half the fuel. Similar thing happens with the spark....


7

It sounds like your shifter may not be seating into park correctly. You may want to try moving it back and forth from gear into park (occasionally, with a slight amount of force; you don't want to break anything). Verify that the key is not in the accessory position, and each time you switch to park, try to remove the key. I've also seen the key release ...


7

If the picture you have attached is similar to the starter on you car, then the power to the starter motor is only delivered if the solenoid operates, so the solenoid must be working. However, the shift lever labelled in the picture, that pushes the pinion forward to engage with the flywheel may be broken, that would explain your problem. Your problem ...


7

If you are hearing the starter turn (typical starter whir), the most probable problem would be the one way clutch has gone out. It's the part of the starter with the teeth on it which engages the starter ring gear. If the solenoid has gone out, the starter motor will not spin, because the solenoid is the part which forces a large copper washer into the posts ...


7

Yes you should ground the spark plug. In your case the spark plug was close enough to the block to still jump the gap. If the plug was far enough away from metal nothing would have happened. On a separate note. When testing for spark it is recommended to use a spark tester. Using a spark plug is a poor test of the ignition system. In free air the spark ...


7

Voltage drop problems are very common in multi component, multi interface systems. For instance the starter motor has a cable that runs from the battery to the starter. The cable has ring terminals on the ends and those terminals are bolted to the appropriate component. High resistance at any of the aforementioned connection points is a recipe for voltage ...


7

The transmission and its control systems will not be damaged by this practice. Safety could be compromised if the shifter is left in this position. The park lock will not be engaged so the vehicle could roll away. This is a system internal to the transmission that is a back-up to the parking brake. It is important to move the shifter back to the P position ...


6

Pin 16 on the ODB-II connector is specified as "Battery Power" or "Battery Positive". There will always be 12v power between pin 4 and 16. Note that pin 5 has "ground" in the description, but that is just for the communication signalling and not for power. The connector will always have power on these two pins regardless of the key position, and when ...


6

You need Spark, Fuel, and Compression for an engine to run. Since this engine was just reassembled, there is a lot to question. Spark - rotor position - beware of caps where the points are not "straight through" plug wires in the correct position timing - may need play with it a bit coil - ensure it is firing spark plug firing - use a jumper to connect ...


6

Two things about this bike if it is OEM It has two sets of coils. It has two sets of points. If you take the right side cover off the motor where the crank is, you can see if the points have been swapped out with signal generators, a common mod for this bike. One coil fires for cylinder 1 and 4, the other fires for cylinder 2 and 3. IMO you have a bad ...


6

This could be caused by multiple things, the most likely case would be a bad battery in need of replacement. However before coming to that conclusion there are a few things which can be checked. Make sure your battery terminals are in good working order and are not grounding out any where make sure they are insulated and not cracked and touching metal. ...


6

Funny you should ask this Max :) First lets make sure of our definition. Running an engine lean means changing the air / fuel ratio to have more air than is ideal (14.7:1 air to fuel). In my reading there are two effects. First, the fuel is an atomized liquid which has a cooling effect on the combustion chamber. So less fuel, less cooling effect. Second, ...


6

You should have 2 coil packs on the back side of the engine near the throttle body. Wires run to individual cylinders. I don't know how easy it would be to find locally but you can use an inductance spark tester. http://www.amazon.com/Lisle-19380-Spark-Tester/dp/B0002STS3U Another way to see if the coil pack is firing would be to pull a wire out and ...


5

Honda Coil Over Plug setups have three wires. As mentioned they have an internal Ignition Control Module. Pins 1 & 2 are power and ground while pin 3 is the control signal from the Electronic Control Module. You can test coil resistance with a multimeter. How to Test an Ignition Coil with a Multimeter You can also check the primary coil with a digital ...


5

Referring to this website: If all is well and there is no slack in the timing chain then you will see about three to five degrees of "reverse motion" before the distributor begins to turn. To measure this, do the following: Get a socket which fits the front balancer crank shaft bolt. Get a breaker bar which is long enough to turn the crank using it. ...


5

In the circuit that contains your starter relay there is a fuse, typically it is a 30amp fuse. Here is an image a Yamaha R1 starter relay fuse Depending on your model of motorcycle you will need to: Discover the location of your relay fuse Remove a plastic cover for the relay Possibly, remove a plastic cover for the fuse. Remove and Replace old fuse ...


5

If you have ever seen an oxy-acetylene torch being used, you will have noticed that before the oxygen is turned on, the torch has a bright yellow flame. This is the fuel burning in a less than ideal amount of oxygen. The flame is relatively cool and it produces a lot of soot. When the oxygen is turned on, tthe flame turns blue and becomes hot enough to ...


5

Go with the standard replacement (the warranty choice is left up to you). High output coils are used in modified engines that have higher combustion chamber pressures from either higher compression, boost, or a combination of both. Save your money, unless you plan to turbocharge the 626...


5

Yes, there is an interlock between the ignition and the shifter, as well as an interlock between the shifter and the brake pedal. Something could have gotten messed up somewhere. There is a procedure to move the shifter, if stepping on the brake and the key system don't allow it. Check your owners guide. Generally there is a small removable plastic cover ...


4

Some four-stroke engines did have wasted spark ignition. The basic advantage was not needing a distributor, which was one of the less reliable parts of the ignition system. Wasted spark systems were used long before plug-top coil packs came into common use. The reliability issues are not so important with modern ignition components. Wasted spark ignition ...


4

I think there is some misunderstanding here; it is not true that spark plugs fire in pairs on all four-stroke engines (unless the head design incorporates two spark plugs for each cylinder). You're probably thinking of a two-stroke engine in which the power stroke is the only stroke responsible for moving the piston down. Consider the GIF animation below ...



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