Questions tagged [ignition]

For questions related to the process and components that generate the spark that ignites the fuel-air mixture in gasoline engines.

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5
votes
1answer
397 views

I reversed polarity on a jump pack when attempting to start my 2000 Dodge Neon.

I attempted to jump my 2000 Dodge Neon off in the dark with a jump pack, and I accidentally reversed the polarity. The tire inflator on the jump pack landed on my positive starter wire and burned it ...
4
votes
1answer
8k views

SMAX Zetec 2.0 TDCi 2010 Plate - Why wont my car start ? (see video)

Car used to start fine 49 out of 50 times but without obvious reason it sometimes struggled to start (as seen in video). This can be on a cold start or a warm start. Happens in warm, cold, wet and dry ...
7
votes
2answers
1k views

Distinguishing between mechanical and electrical failure in ignition diagnosis

After a month and a half of not driving the car, yesterday I tried to turn it on, however the only sound that I heard was the rotation of the starter, which is not engaging the flywheel (the engine is ...
16
votes
7answers
44k views

How exactly does running fuel-lean increase the temperature of ignition?

I learned in this question that running an engine fuel-lean will increase the temperature of ignition, among other things such as causing problems with the catalytic converter. I have no idea how or ...
3
votes
1answer
43 views

My car won't crank

I started my car the other day and turned the car off. When I tried starting it back up it wouldn't crank. I took the key out and my dashboard gauges would stay on. I can start it up by the ...
7
votes
2answers
3k views

Key Doesn't come out of Town and Country

A few days ago I could not get my keys out of my 2005 Town and Country. Soon after, the battery ran out of juice. If I jump the battery, I can start the car and drive it. But when I park the vehicle I ...
8
votes
4answers
85k views

Corrosion on battery, won't start, making clicking noise, won't charge

I'm trying to charge the battery on my 2002 Celica. Here is some background: Battery is a bit old, around 3 years or so. Corrosion has been building on the battery to the point that it almost cannot ...
7
votes
1answer
313 views

1973 CB350-four, no spark on 1 and 4 when it's cold

When this bike is cold the 1st and 4th cylinders do not fire. Pulling the plugs and checking them, there is not spark. If you get the bike hot, it runs really bad on the way there, 1 and 4 come back....
9
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2answers
13k views

What can I do with an Inline Spark Tester?

Due to my recent problem with weakly firing plugs, I'm looking at inline spark testers. I've seen three basic types: The simple flashing one which goes in between the wire and plug with the plug in ...
5
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4answers
5k views

97 Honda Accord won't start after head gasket replacement

I recently replaced the head gasket on my Honda Accord. The cylinder head was tested at a machine shop and they also replaced the valve seals. I didn't do any work to the cylinders, except use ...
4
votes
0answers
84 views

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 ...
1
vote
4answers
7k 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 ...
3
votes
1answer
599 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
votes
1answer
727 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, ...
8
votes
2answers
5k 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, ...
7
votes
2answers
68k 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 will be ...
7
votes
1answer
697 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
votes
3answers
1k 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'...
11
votes
2answers
18k views

My Ignition Timing is Retarded, no seriously, it's really screwed up

I logged some test data to try and help me figure out why my 98 Mazda 626 GF 2L ATX has a rough idle and is suffering from hesitation. (Speed k/h),(TPS_v),(MAF g/sec),(RPM),(SparkAdvance),(EngineLoad)...
4
votes
3answers
108k 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 ...
2
votes
3answers
1k 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 ...
6
votes
3answers
2k 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 ...
5
votes
2answers
6k 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 ...
4
votes
1answer
1k 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) ...
1
vote
1answer
44 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 ...
2
votes
1answer
543 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?
3
votes
0answers
57 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 ...
4
votes
3answers
56 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 ...
2
votes
1answer
5k 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 ...
4
votes
0answers
708 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 ...
4
votes
1answer
857 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
2k 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 ...
3
votes
3answers
5k 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 ...
1
vote
2answers
2k 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 ...
8
votes
3answers
4k 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 them to death. This morning, when I try to start the ignition, my engine clicks a lot but won't turn over. ...
5
votes
2answers
257k 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? ...
2
votes
0answers
75 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 ...
2
votes
1answer
5k 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 ...
7
votes
1answer
34k 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 ...
2
votes
1answer
720 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 ...
2
votes
1answer
2k 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?
4
votes
1answer
1k 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 ...
3
votes
2answers
27k 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 ...
3
votes
1answer
484 views

Reprogramming a Magneti Marelli Microplex MED604C

I'm interested in reprogramming a Magneti Marelli Microplex MED604C ECU for the ignition of an uno turbo, but I can't seem to find any documentation on this? I'm new to ECU remapping, and my ...
2
votes
2answers
5k 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 ...
2
votes
1answer
5k 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, ...
2
votes
3answers
15k 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 ...
8
votes
1answer
13k 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
votes
1answer
9k 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 ...
5
votes
2answers
13k 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 of ...

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