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98 Eagle Talon (eclipse) idle problem, missfire

computer throwing codes p0300- p0304 what could be wrong with this thing? its the 2.0 dohc engine (i know shitty neon engine lol) idles bad and misses randomly on all four cylinders. drives fine and the missing is only noticable when idling. the computer is not indicating the any of the sensors are bad thes are the only codes its displaying. could it be the timing????? engine compartment to interior to Exhaust...


 


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How To Find A Vacuum Leak - EricTheCarGuy
Vacuum leaks are one of the biggest causes of engine performance problems. This video is pretty straight forward in it's approach to finding a vacuum leak. On thing I might mention is that not all vacuum leaks are at the engine. Some HVAC systems run on engine vacuum and can cause a leak under the dash in some cases. I've even seen vacuum operated door locks. Just be sure to be careful spraying flammable stuff on a hot engine, you don't want to take one problem and make it a whole lot worse. You can also use a spray bottle with water to do this same test. It may not be as effective, but you don't have to worry about spraying a flammable substance on a hot engine. For more information on diagnosing engine performance issues, check out this article I wrote. http://www.ericthecarguy.com/faq/solving-automotive-performance-issues The best place for answers to your automotive questions: http://www.ericthecarguy.com Facebook: https://www.facebook.com/EricTheCarGuy?fref=ts Twitter: https://twitter.com/EricTheCarGuy Google+: https://plus.google.com/100195180196698058780/posts Information on Premium Membership: https://www.ericthecarguy.com/premium-content-streaming-etcg-content 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.





1G Eclipse GSX Idle Problem
I don't know whats goin on can someone help me!?





Weird Idle on my 1991 Mitsubishi Eclipse GSX
Alright so this video shows the really strange idle my eclipse has... Mods are as follows: 16G turbo Injen Intake FMIC 3" turboback Exhaust 550cc Injectors 255 Walbro Fuel Pump HKS SSQV BOV AFPR SAFC-II





Misfiring 1999 Mitsubishi Eclipse
Poor thing, don't know whats wrong with it...





Mitsubishi Eclipse 1998 Bad Idle High idle
Forgot to mention that when i turn on my AC the car drops down to 1500 but then out of no where it raises back again to 2500 BTW i tried the BISS and it was all the way in if i loosen it the car idle even HIGHER!!! and the leak i may have is from turbo pipe to Intercooler... it hisses when i rev past 4000 and then the car starts misfiring and jerking.... the cars getting on my nerves but... what can i do helppp!!! thanks





Engine coolant system and compression testing
There are lots of ways to diagnose a head gasket or to check the general health of an engine, but this video is focusing on 3 major systems. 1) The coolant system 2) The combustion chamber 3) The valvetrain COOLANT SYSTEM PRESSURE TEST: The boiling point of water (coolant) RISES under pressure. It's imperative that the coolant system has NO AIR in it, no leaks, a known-good thermostat, and a good radiator cap in order to function properly. If the pressure stamped on your radiator cap is not being achieved, Boyle's law is not taking affect, and your coolant will boil when the car is being driven at it's normal operating temperature, and may exhibit signs of a blown head gasket. Many have cursed the process of burping all the air out, sometimes even taking several days and heat cycles to complete the process. COMPRESSION TEST: The point of a compression test is to diagnose the health of each combustion chamber. A compression test is a crude test to determine if a ring, valve seal, valve, or a head gasket problem exists. It will show immediately in this test because the gauge will not rise to the pressure specified for your engine. There are 3 numbers you need regarding your car's setup. High limit, Low Limit and Range. The high limit is specified by your car's manufacturer and reflects the equipment they used to build the engine. If you EXCEED the high limit, chances are it's caused by excessive carbon build-up, and a Seafoam or MCCC treatment will usually remove the carbon and return it to an acceptable value. If that build-up isn't caused by cheap gas, then it's likely the car has an EGR problem or excessive oil blow-by leading to this situation. The Low Limit represents the point in which the combustion chamber is not able to compress the engine's specified fuel to the point where it can ignite it. Gasoline and air need to be compressed together in order for the energy stored in that fuel to be released. If it isn't achieved, it will only burn, and not explode. Lower-than-Low Limit pressure means it's time to rebuild the engine because one of the sealing components in the combustion chamber has failed or is in need of servicing. Either way, it's expensive because working on the combustion chamber requires extensive disassembly or unusual tools that the average mechanic doesn't have. Range specifies how many PSI of variance there can be between ALL of your compression numbers. If there's a large variance on one cylinder, then the engine will not run smoothly. If a cylinder is below spec, it may feel like a misfire even though the plug is getting spark. If all the values are close, the engine idles and revs more smoothly. Aftermarket cams, pistons, head gaskets or machining will affect the results of your tests. A higher compression piston or thinner head gasket can raise the compression numbers slightly. A thicker head gasket or longer-duration cams will lower compression slightly. I don't know how to determine exact numbers because I'm not an engineer, but you should remember that during testing if your engine is modified. So in a nutshell, you want your numbers to be close and between the high and low limits. If a test fails, the only way to determine WHAT failed is to perform a leakdown test. Modifications to the factory internals or machining WILL change the OEM compression limit values, but NOT the range value. LEAKDOWN TEST: I'm not using a real leakdown tester in this video. A real leakdown tester has a regulator, a pressure gauge, a restrictor, and another pressure gauge. You measure the value of the post-restrictor gauge vs. the regulated supply and mark the percentage of pressure-drop. As a general rule, most cars are healthy around a 20% value. Race engines should be between 1-10% for highest performance. I'm using the ghetto method for this test. Get the piston roughly at Top Dead Center, apply air pressure, fine tune TDC for that piston by turning the crank with a wrench to see if you can stop all of the airflow. Listen to the intake for leaking air to determine if there's a bad intake valve. Listen to the tailpipe for leaking Exhaust valves. If neither are leaking, but air is still flowing, remove the tool and pour a cap of oil into the spark plug hole so that it coats the rings to make a better seal. After oiling, re-install the tool and repeat the test to see if you get better results. If you do, you have bad rings. If you don't, you have bad valve stem seals, a blown head gasket, or a cracked head. If you have a cracked head or bad head gasket, then there will likely be pressure venting through your coolant system. Taking off the radiator cap and watching for air rising to the filler neck will point you in the right direction.





Engine idle problem
Problem with my 300zx idling





98 Talon eclipse 2.0 problem missfire all cylinders
computer throwing codes p0300- p0304 what could be wrong with this thing? its the 2.0 dohc engine (i know shitty neon engine lol) idles bad and misses randomly on all four cylinders. drives fine and the missing is only noticable when idling. the computer is not indicating the any of the sensors are bad thes are the only codes its displaying. could it be the timing????? engine compartment to interior to Exhaust...





DSM startup problem
won't start





eclipse idle problem
it does this only on a cold start up and then quits when the car is warm





How To Fix P0300 random misfire codes in your car
Scotty Kilmer, mechanic for the last 46 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. And, If you like my car help, be sure to watch my live car talk show every Saturday morning at 10 AM CST on YouTube. I answer your car questions LIVE there. Just check it out at https://www.youtube.com/watch?v=VognjkYaMjg&list=UUuxpxCCevIlF-k-K5YU8XPA&f eature=c4-overview . And remember, every TUESDAY I upload a new video, so don't miss them.





Misfire, P0304
An easy one step way to diagnose a misfire when it's on the front (easy) bank of the engine





Multi Cylinder misfire
Misfire on cylinders 1,3 & 5 Codes:P0300,P0301,P0303,P0305. Engine is running rough when Idling. Check engine light came on





Low rough idle running rich SOLVED
FIXED: It was the map sensor. the wires were barely wrapped and it was not getting a good connection black smoke. b18c1 running very rich and rough. idle is low. and when i rev it, it is still as rough as idle. a lot of gas is getting pumped into the engine, and i have no idea why. i was messing with the TB before this happened. info on the engine: --b18c1 --stock TB, intake mani, fuel rail, sensors besides the 3 bar map --Holley FPR --450cc dsm injectors --chipped ECU on crome any info would be great





Fixed Rough Idle and Cold Start Mitsubishi
Found out it was fuel pressure loss that caused the long cranks after sitting and odd idling. Didnt cost anything to fix!





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1999 Mitsubishi Eclipse GSX: 6.940 @ 198.470
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1990 Mitsubishi Eclipse GSX: 9.650 @ 148.000
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1991 Eagle Talon TSi Awd: 10.460 @ 137.800
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1990 Eagle Talon TSi FWD: 10.727 @ 142.120
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1990 Mitsubishi Eclipse GSX: 10.747 @ 135.270
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1991 Eagle Talon TSI AWD: 10.806 @ 133.150
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1992 Eagle Talon TSI AWD: 10.846 @ 127.850
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1992 Mitsubishi Eclipse GSX: 10.971 @ 128.900
Vassil Vutov, Engine: 2.0 4-Cyl, Turbos: FP3052 Tires: Falken Azenis 205/55/16


1993 Mitsubishi Eclipse GSX: 11.000 @ 126.000
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1991 Eagle Talon TSI: 11.160 @ 129.000
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1991 Mitsubishi Eclipse GSX: 11.164 @ 130.520
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