How to Diagnose an Engine Misfire- Fuel, Fire or Compression
A misfire can be a tough problem to trace. Many parts of the automobile can factor in causing it making for a very difficult time and aggravation. Mike and I give you a quick and simple way to find out whether one of the three components are missing thus causing a misfire.
The automobile consist of:
Powertrain:
1. Engine:
• Fuel System: Purpose is to deliver fuel to the engine. It consists of the fuel tank, pump, gauge/sensor, filter, pressure regulator and injectors.
• Air Intake System: Purpose is to clean and direct outside air into the engine. It consist of air filter, ducts, air plenum and intake manifold.
• Exhaust System: Purpose is to direct Exhaust gasses out of combustion out of engine. It consists of the Exhaust manifold, converters, pipes and mufflers.
• Cooling System: Purpose is to remove excess heat from the engine. It consists of water pump, hoses, radiator, thermostat, cooling fan and coolant recovery tank. Also the oil system serves as a cooling system as well as a lubricating system. It consist of oil pump, pan, filter and cooler.
Drivetrain:
1. Clutch: Purpose is to connect the engine and transmission together. It consists of clutch drive disc, driven disc, release bearing, clutch fork, cable, slave cylinder, master cylinder. There are three types of clutch systems: mechanical, cable and hydraulic.
2. Transmission: Purpose is to match engine speed to road speed. Two types used are manual or automatic. These consist of gears, linkages, cables and converters for automatics. A manual is connected to the clutch by a flywheel and automatic by a flexplate.
3. Driveshaft: Purpose is to connect the transmission to the rear axle. It consists of a slip yoke, shaft and universal joints.
4. Rear axle differential: Purpose is to change the angle of motion from engine to the wheels. It also divides torque between the wheels. It consists of a ring and pinion gear, carrier, bearings, crush sleeve and axle shafts.
5. Wheels/Tires: Purpose is to provide traction to the road as well as carry the weight of the vehicle.
Vehicle Control Systems:
1. Brakes: Purpose is to slow and stop the vehicle. It consists of master cylinder, brake Booster (vacuum or hydraulic), calipers, drums, pads and rotors.
2. Steering: Purpose is to direct vehicle in the required direction. Consists of steering gear (rack & pinion), steering wheel, column, inner/outer tie rods, pump, reservoir, hoses and pipes.
3. Suspension: Purpose is to provide stability and handling while also providing comfort to the ride. Consists of shocks, struts, sway bars, end links, springs, trailing arms and bushings.
Comfort System:
1: Heating Ventilation Air Conditioning (HVAC): Heats and cools interior air to passenger comfort. Also circulates outside and inside air.
• Air Conditioning: Consist of condenser, compressor, accumulator (receiver/dryer) orifice, expansion valve, hoses, evaporator, controls, actuators and modules.
• Heating: Consists of heater core, valves, hoses and switches.
Electrical Systems:
1. Power Generation: Creates electrical power to run all the electrical systems. Consists of the alternator.
2. Power storage: Stores unused power to start the car and supply voltage to the alternator to create more electricity.
• Both systems consist of wiring, harnesses, fuse, relays and modules.
How To Fix P0300 random misfire codes in your car
Scotty Kilmer, mechanic for the last 42 years and counting, shows how to fix your car if the check engine light is on and you have trouble code P0300 stored in the computer. Visit Scottykilmer.com for free answers to all your car questions.
2005 Trailblazer 4.2 #6 cylinder misfire
Case study on a 4.2l C.O.P engine with a misfire. For more info. on my Ebook go to www.autocomputerstroubleshooting.com
Fixing A Misfiring Engine P0301
Scotty Kilmer, mechanic for the last 44 years, shows how to fix an engine that's misfiring. If your check engine light is on, and it has any of the codes P0301 to P0308, you have a misfire. Be sure to watch this video to learn how to fix it.
How to find a misfire without a scanner 3
Scanners are great tools, but sometimes they aren't any help. That's when understanding the system, and how to test it is all you have. Here are some ways to find the problem
Finding Engine Vacuum Leaks With A Cigar
Scotty Kilmer, mechanic for the last 43 years, shows how you can find engine vacuum leaks in your vehicle using cigar smoke. It really works as well as a thousand dollar smoke machine.
DIY Fuel Injector Cleaning & Repair
This is the end result of a few hours of work and $60 because I didn't have a 1/4" NPT tap in any of my kits. I could have done this for less-than $40. The BG products were donated to the cause.
Tech info:
The REASON you want to use 20 PSI is precisely because of how peak-hold type injectors work. The injector signal sends a 4v spike to open a peak-hold type injector quickly, then maintains its open condition with only 1 volt. Really, it's a current thing and there's a longer explanation, but that's it in a nutshell. When you put the injector in its operating pressure, it takes more than a AA battery to open it, but you don't want to sustain that much current with a momentary switch and your expensive injectors. This isn't in the video because this warning wouldn't be as clear. Unless you can simulate the injector pulse precisely, don't try it. 1.5v is enough to open it below its operating pressure. If you open it and THEN apply pressure, you can flow as much pressure as you can throw at it.
I don't discourage anyone from getting their injectors professionally cleaned and balanced, but in my case, I didn't feel that was necessary.
In my first video, I thanked the seller for these injectors and happy to know I got a great deal on high quality parts. My gratitude is even greater because I had problems with them. It gave me an opportunity to help others troubleshoot these kinds of problems when purchasing used parts. A different idiot might have blamed the seller for peddling crap, demanding their money back... but that would only be because they didn't even know what they were looking at.
This particular idiot knows what high quality parts RC injectors are and how to clean 'em. $250 + $60 still means I saved about $150 on a brand new set. We all benefit because I bought these and I'm grateful! Let the good times roll.
No code misfire
So you have a car with a clear misfire but there are no codes. Don't worry, you can still use your scanner & labscope to quickly and accurately identify the problem and fix it with confidence without throwing parts at it.
Finding an intermittent
Finding an intermittent problem is probably the most frustrating thing we do. And because of that, it's also probably the problem that get's the most parts "thrown" at it. Remember this. The intermittent problem does have a cause. All we have to do is stop guessing and look for evidence. Follow the evidence and it will lead you to the problem.
How To Solve An Engine Overheat Condition - EricTheCarGuy
How To Solve An Engine Overheat Condition - EricTheCarGuy
http://www.ericthecarguy.com/
I actually had fun putting this one together for you since the car I was working on didn't cooperate it made it so I could show you real world problems as they happened, very cool. I think this one is pretty self explanatory so I will save a long explanation. In case you missed the link to the "Bleeding a Cooling System" here is a link for you
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Click below and Stay Dirty
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Stay dirty
ETCG
Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.
Clear check engine light for less than 5 dollars
More Tutorials on my CHANNEL: http://www.youtube.com/user/moccina
*This video is an EXPERIMENT I wanted to try on my car, and is for INFORMATIONAL purposes ONLY. This fix is for off-road use. The content shown in this video is not intended to encourage emissions test cheating. I enjoy the process of testing theory because you always learn something new, regardless of the outcome.
Using a spark plug defouler kit, I install a "buffer" in between the downstream oxygen sensor and the catalytic converter. Quite often, frustrated car owners get the P0420 code for reasons other than a bad cat. I have heard of people getting the code just because they removed the converter and reinstalled it. It can also happen if you run your vehicle out of gas etc... etc...
It is also common for car owners to get the P0420 code, replace the converter, and both o2 sensors-- only to have the code come back after 1000 miles or so. This can be a very frustrating, time consuming and of course-- expensive venture. Here is one way to resolve the issue. Good luck and have fun!
How To Check Fuel Injectors
Scotty Kilmer, mechanic for the last 42 years and counting, shows how you can quickly check if the fuel injectors in your car are operating correctly. visit scottykilmer.com for free answers to all your car questions.
P0401 EGR Valve Port Cleaning
This is my DIY for clearing the CEL code P0401 (EGR Insufficient Flow) on a 98 Honda Prelude.
In cars with OBD2 if the EGR valve is restricted by carbon deposits it will detect that and throw a CEL. To get rid of that CEL you must clean out the carbon to allow flow.
After combustion occurs within the engine it creates Exhaust. Gas from the Exhaust straight from the engine is very bad for the air. The EGR valve recaptures that Exhaust and runs it through the combustion process again, which lowers the temperature of the fumes (Exhaust gas) and lowers the amount of pollution exiting into the atmosphere.
If you don't fix it you won't pass SMOG in California. You may experience rough idling and poor acceleration.
Tips:
Get your "EGR port plugs" from Honda. They will have it.
Removing the injectors are important to allow clearance to the port plugs.
When you pull out the injectors you might as well clean them since they are out.
Slide hammers make pulling the port plugs out easily.
Drill with a bit the size of your tap. Drilling halfway through the port plug to should be enough distance to fully grab the port with the slide hammer.
If after you clean your ports and valve the CEL has not been cleared, you EGR valve maybe faulty and needs to be replaced.
P0300 Misfire cylinder 3
truck was running like crap and i knew it was either the plugs, the wires or the cap and rotor, being as i just replaced the distributor, cap and rotor a little over a year ago i narrowed it immediately to the wires or plugs and being that the spark plugs were almost 5 years old i figured it was time for them to go so i replaced the plugs and problem solved, this is what i did on my lunch break today sorry the video is so short but this was litterally done in under 10 minutes
