An electrical system that handles the spark component of the ignition process. Ignition systems are comprised of but not limited to ignition coils, ECU, signal generators, spark plugs and wires, distributor mechanisms, points, condensers and sensors.

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03 chevy impala- I have a bad misfire

When I push on the gas it hesitates to go. The check engine light starts flashing but once it gets rolling its gone. I change the spark plugs, put in a gas treatment, shot some B-12 in it and ...
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3answers
168 views

Relation Between RPM and Spark Advance

It's my understanding that under normal operation spark advance is directly proportional to RPM, i.e. as RPM increases so does spark advance due to the need to ignite the AFM earlier the quicker the ...
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1answer
105 views

How is Dodge Spark Advance Controlled by the PCM if there is a Distributor?

The Chilton manual for the late 90s and early 2000s Durango and RAM says that PCM controls ignition timing and spark advance. I don't understand this, because these motors are equipped with a ...
5
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1answer
100 views

Motorcycle Starting Issue - no longer starting after attempting to jump with a car battery

I tried jump start my bike with my car battery because the motorcycle battery was really low and would not start. I mistakenly touched both ends of the jump leads together and cause a big spark, ...
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1answer
441 views

2003 Honda Accord - Intermittent no start/no crank

2003 Honda Accord, everything lights up fine but it has a really strange “groaning” noise, kinda quietly. Then after a few tries it starts up perfectly fine. Sometimes it starts up first time, ...
5
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2answers
558 views

Honda CB400 Super-Four - Power Issue

I have a Honda CB400 Super-Four. My bike starts and rides but I can't get more than 5000rpm out of her. If I do then she floods and cuts out. Two of her exhaust pipes are cold and two are warm. ...
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2answers
3k views

OBD II power when key not in ignition

I can't get to the OBD connector on my car at the moment. As far as I know the OBD II voltage is active even when the key is in lock. Can anyone confirm this? edit : It's for a product that ...
7
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1answer
64 views

Finding a constant and non constant power wire in a car

The car I have is a 2001 Buick century. I have a after market push to start kit. It came with a main unit and the diagram shows that a brown wire is for a constant power when the engine is on. And a ...
7
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3answers
346 views

Single-cylinder engine - no camshaft position sensor?

I'm doing some research on the Honda CRF450. This is a single-cylinder engine. I'm interested in the fuel-injected models (not the older carbureted versions). As far as I can tell, this engine doesn'...
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3answers
2k views

Car will not start Sometimes?

Hey i just wanted to ask about my girlfriends car she has been having problems with for over a year.. we had it checked but they always say nothing is wrong (usually because the car starts when they ...
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2answers
152 views

Replacing Spark Plug with Laser Iridium NGK Spark Plug

I have 2012 KTM Duke 125 at 10 000 miles (16k kilometers). I am the third owner of bike for 2 years. Whenever i twist the throttle fastly, motorcycle is chocked up. So i thought the problem could be ...
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3answers
99 views

2005 Dodge Caravan - Erratic Misfire

The engine was misfiring for quite a while. At some point, the battery went dead due to a bad alternator and all the electrical systems went nuts. I replaced the alternator & battery. At some ...
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2answers
163 views

Very slight arcing of good spark plug wires

While looking for the reason of occasional misfires I checked if my spark plug wires are arcing at night. There was no textbook arcing with popping sounds and pretty lights, but there was extremely ...
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1answer
63 views

Frequent spark plug change

I have a Hyundai Tucson , 2008 model. About 20 months ago while my wife was driving the car, some smoke come out and she stopped the car and they tow it. (She doesn't remember white or black smoke) ...
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1answer
33 views

Studder first starting

Hyundai Tucson 2008. Gasoline model. I live in a very hot climate and when I start my car in the morning it studders for a while. If I pump the gas, it disappears and doesn't come back. I ...
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1answer
63 views

Do Distributor Caps need Regular Replacement?

Does the rotor physically contact the points in a distributor cap and cause them to wear down such that the cap would need replacement at regular intervals?
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28 views

ford mondeo v6 st24

Just wondering if anyone can help as we have this Mondeo and all of a sudden all the ignition went and have no power at all. Any suggestions as to what it might be? All the fuses are fine and still ...
3
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3answers
37 views

What is the State of the Ignition Pin of a Vehicle?

I got a Vehicle Tracking Unit, The Connection required is Red - +12V Black - GND Green - Ignition. I need to test the unit before putting it into the car. So to simulate the ignition procedure, what ...
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1answer
359 views

Why Does a Cracked or Loose Distributor Cap Cause Problems?

Why does a distributor cap that is improperly sealed, due to being either loose or cracked, cause problems such as erratic idle or not starting? Could a loose cap cause problems with an optical rotor ...
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146 views

Car won't unlock with remote and won't start? Toyota Camry 1999

My sister gave me this car for school and she told me this happens a lot. Her mechanic friend says it's an alarm problem and my alarm is locked. Unfortunately her and her friend live on the opposite ...
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0answers
101 views

2004 ford taurus - screeching sound when attempting to start the car

To start, I know nothing about cars aside from how to drive them. I have a pre owned 2004 ford taurus with 60000 miles. Recently, it has been making a screeching noise when I turn the key to start the ...
4
votes
2answers
134 views

Toyota Sienna 2005 ignition switch issue?

Takes some time to start up Sienna. Have to take out the key, put it back, wiggle it around, eventually it starts. When it just started happening, we took it the Toyota Dealer and they replaced the ...
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3answers
684 views

Pontiac Sunfire mysteriously won't start

So, here's the deal: -No lights, no noise, no clicking. -Battery voltage reads fine on multimeter. Terminals are very clean and not corroded. -But it won't jump start. -Headlights turn on. -Fuses are ...
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2answers
176 views

Half of my cylinders aren't firing. Is it safe to move my car to a garage (~30km)?

I am having some issue with my ECU or ignition system which I can't fix myself. Only two of my four cylinders are firing. Is it safe to drive my car to the official mechanic at 30km distance? Should I ...
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3answers
2k views

Car won't start, possibly due to ants in batteries

Yesterday there were a ton of ants crawling out of some hole in my backseat. I sprayed the shit out of them. This morning, when I try to start the ignition, my engine clicks a lot but won't turn ...
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votes
1answer
10k views

Car won't start, lights and electronics flicker

Ford Focus. When i turn the ignition, the engine will not start. The lights and electronics will flicker while i am turning the ignition. I do not hear the engine "turning over". What is my issue? ...
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43 views

Defective connection between radiator fan relay and ignition?

I have a Toyota AE101 DX Corolla. When I turn the key to start the car it does not tumble. It turned out that the fan relay doesn't come on with the key turned on like it usually does. Mind you this ...
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1answer
655 views

2007 Hyundai Sonata Automatic Key Won't Turn

This started before the steering wheel was locked, I locked it because I forgot what a locked steering wheel feels like and wasn't thinking too much. Had a LOT of time to wiggle the key before it was ...
2
votes
1answer
113 views

What do you do with dielectric grease on spark plugs?

There seems to be a lot of conflicting answers on what you're supposed to do with dielectric grease. The instructions on the grease I bought says to squeeze it into the boot, but everywhere I've read ...
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votes
1answer
50 views

Does electrode size/shape matter?

I have an 84 Ranger and I recently bought some new spark plugs for the motor. I noticed that the old electrodes were huge compared to the brand new ones I just bought. Does the size of the electrode ...
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3answers
2k views

Why the wasted spark in four-stroke motors?

This just came up in my curious mind. In a typical four-stroke engine with an even number of cylinders, spark plugs fire in pairs. This means there is a wasted spark as one cylinder is in exhaust, ...
2
votes
1answer
836 views

2015 hawk 250cc enduro motorcycle

While riding down the street, our motorcycle just died. Tried to restart it and it sounded like it wasn't firing. We changed the plug and ignition coil and still not firing. What should we do now?
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votes
1answer
114 views

'95 Chevy Blazer suddenly refuses to start

While driving my '95 Chevy Blazer (4.3L V6) on the highway, I pulled off to use a rest stop. The engine was (and has) been running/starting well, and upon returning to leave, the engine would not ...
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2answers
2k views

Ignition Switch vs. Ignition Lock Cylinder

I have a 2010 Ford Escape with 95,000 miles. I have a problem with the car that when I put the key in and turn, the car doesn't crank. The lights come on when the key is turned, but there's no sound ...
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1answer
150 views

Cooling the ignition coil

I had an old 64 Fairlane that died in rush hour traffic one day. I called a buddy who worked near me-- he pulled up to the side of the road with a bag of ice, and held it to the ignition coil. The ...
2
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1answer
163 views

Reprogramming a Magneti Marelli Microplex MED604C

Im interested in reprogramming a Magneti Marelli Microplex MED604C ecu for the ignition of a uno turbo, but I can't seem to find any documentation for this? I'm new to ecu remapping, and my ...
2
votes
2answers
412 views

Engine jerking and revving, multiple failed ignition coils

This problem started a month ago. My Aveo started revving and jerking when it was sitting at a light on my way home (2 blocks from my house) and the engine light came on. I drove it home. The next ...
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1answer
430 views

How to diagnose a bad stator?

Consider the following diagram : This is for a Polaris sportsman 700 2003 ATV On the top right corner, you have the information to check if the stator function properly. For the first three coils, ...
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2answers
1k views

Screeching noise when attempting to start car

I have a Ford Bantam 1.3l pickup (South African) with 31 000 km on the clock. This morning when I tried to start the car (cold start), it made a loud scratching/screeching noise (like when turning ...
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votes
1answer
1k views

Acceptable amount of slack in a timing chain with high mileage?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine ...
6
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1answer
1k views

Engine revs to 4000 RPM without pressing gas pedal

I tried to start my car today but something strange keeps on happening. It turns on just fine, but once the engine is operating it starts revving to 4000 RPM even though I am not pressing the gas ...
4
votes
2answers
2k views

What is an acceptable amount of up/down play in a distributor shaft?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - This is the distributor style with vertical cap posts. 230,000 miles original owner. EDIT: Please click on link below to see a photo ...
2
votes
1answer
44 views

megane 2 2005 (55 plate UK) issues starting

On a morning I get in the car and press the clutch and start the car using the button as normal but sometimes I can hear the car trying to turn over but nothing happens, then if I turn it off and try ...
2
votes
1answer
82 views

1987 Yamaha fz700 handlebar lock

On my ignition there are a couple positions, on, off, lock, and p. I assumed the lock was for the handle bar lock, but it doesn't lock when I switch it to that, when I switch it to P though it ...
4
votes
0answers
553 views

Is there really such a thing as a skeleton key?

I've worked in the motorcycle industry for a while. I've heard ridiculous claims of something called a "skeleton key" which could turn any ignition to "on". Does something like this really exist? Is ...
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2answers
257 views

AJS Regal Raptor cranks but won't run

I have a AJS Regal Raptor DD125E. When I push the starter switch the engine spins but no spark at the plugs. However as I release the starter switch I get a spark from the plugs on the engine overrun.
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votes
3answers
2k views

Car turning itself off in highway

I drive a 2001 Chevrolet Lumina and I was just wondering if someone here has had any experience like mine. Today I was driving on the highway and then suddenly the car had turned itself off ...
5
votes
2answers
236 views

replacing distributor— spline doesn't align

I'm working on my 63 impala (283 motor) and the previous owner had put a beat up Delco HEI distributor on the car, but it's so large that you can't really time it correctly-- the cap hits the firewall ...
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vote
2answers
62 views

New breaker points not working

I'm trying to replace the breaker point on my 1980 Oldsmobile, trying to fix some spurious misfires and engine stalls. The car was converted to gasoline in the early nineties or late eighties, engine ...
3
votes
1answer
238 views

Cannot get Kubota tractor engine to fire

I have a Kubota T2080 lawn tractor. It has a basic 2-cylinder gasoline naturally aspirated engine. I let it sit last winter and now that it's the spring, I cannot get the engine to fire. The electric ...