This has got to be one of the best explained Car repair videos in UA-cam, and I've seen a whole lot of car repair videos! Straight to the point and plenty of technical detail without any unnecessary razzle dazzle, Excellent Work !
May be it can help, car was slow accelerating and rough idle resulting to stall after everytime i drove for few mile and stop at signal or shopping. I checked cleaned maf sensor, throttle body,replaced pcv valve, ignition coils, spark plugs and so on. But culprit in my case was oxygen sensor. So before replacing several parts, just check by removing sensors like maf, oxygen etc and by the way there was no error in ecu or checklight.
Good question. These are my thoughts... I think if you don't really work on your own vehicles then most parts stores will scan your car for free and tell you the codes. So owning a "code reader" isn't necessary. But you can't always rely on a code to fix your car. Like on this vehicle, there wasn't a fuel pump code. Codes are only guides. If you do work on your own vehicles then a good scan tool is priceless. One that reads and graphs "live data" and has the ability to communicate with at least the engine, abs and body module is minimum. Also a good scan tool can last years. I use mine most everyday and I've had it for over 3 years now. It's definitely paid for itself. Hope that helps
Hi I'm having almost same issue but not as bad, with short term fuel trim going up at stop light engine shakes RPM fluctuate then goes away, car also doesn't have same power or accelerates like it used to. I have a 2011 Kia optima 2.0 turbo with 168k could it be my high pressure fuel pump??
That's a possibility. You should be able to read the high side fuel pressure with a scan tool that displays live data. Compare that to spec. Look at the low side pressure as well (you may have to do this manually). The high side needs a good flow from the low side in order to operate properly.
Hoe do you get live misfire data? I would kill to be able to get live misfire data on my 2004 mustang. All I can do is use mode 6 and find I have misfires but it refreshes randomly and I have no idea when those misfires were recorded.
Hey Carlos, there are many brands to choose from and most of them do a good job. What I recommend is getting something that has the ability to graph live data. On this vehicle if I went with codes only it would have pointed me down the wrong path. So seeing live data was key. Also having bidirectional control is something I look for. It makes diagnosing some issues 10 times easier. But that ability makes the tool pretty expensive. At the least get something that graphs data 👍
It wasn't. Both banks were affected but the engine computer was only detecting a fault on one bank. So it was giving me misleading scan tool information.
This has got to be one of the best explained Car repair videos in UA-cam, and I've seen a whole lot of car repair videos! Straight to the point and plenty of technical detail without any unnecessary razzle dazzle, Excellent Work !
Good stuff, every shop needs a guy like u who actually figures out the problem
This is the video I was looking for. I replaced the maf, injectors, and coils and plugs and I never thought bout the fuel pressure. Thank you.
did that very well ,you are good tech,good teacher,thank good video
Wow, great job explaining the process of Diagnosis . Thanks very much. I clearly need a better OB2 scanner. Can't get the live data like you can.
May be it can help, car was slow accelerating and rough idle resulting to stall after everytime i drove for few mile and stop at signal or shopping. I checked cleaned maf sensor, throttle body,replaced pcv valve, ignition coils, spark plugs and so on. But culprit in my case was oxygen sensor. So before replacing several parts, just check by removing sensors like maf, oxygen etc and by the way there was no error in ecu or checklight.
Thank you for your comment. This could help others 👍
Hello witch OBD reader you use in this video ? Thx
This is the launch x431.
Hi Robert, how do you feel about basic scanners for car owners?
Good question. These are my thoughts... I think if you don't really work on your own vehicles then most parts stores will scan your car for free and tell you the codes. So owning a "code reader" isn't necessary. But you can't always rely on a code to fix your car. Like on this vehicle, there wasn't a fuel pump code. Codes are only guides. If you do work on your own vehicles then a good scan tool is priceless. One that reads and graphs "live data" and has the ability to communicate with at least the engine, abs and body module is minimum. Also a good scan tool can last years. I use mine most everyday and I've had it for over 3 years now. It's definitely paid for itself. Hope that helps
@@ValleyMobileAutomotive Really thanks for your sharing!
@@ValleyMobileAutomotive Is it worth it for car owners to have a car battery meter?
Hi I'm having almost same issue but not as bad, with short term fuel trim going up at stop light engine shakes RPM fluctuate then goes away, car also doesn't have same power or accelerates like it used to. I have a 2011 Kia optima 2.0 turbo with 168k could it be my high pressure fuel pump??
That's a possibility. You should be able to read the high side fuel pressure with a scan tool that displays live data. Compare that to spec. Look at the low side pressure as well (you may have to do this manually). The high side needs a good flow from the low side in order to operate properly.
@@ValleyMobileAutomotive Awesome thank you so much for your response
Hoe do you get live misfire data? I would kill to be able to get live misfire data on my 2004 mustang. All I can do is use mode 6 and find I have misfires but it refreshes randomly and I have no idea when those misfires were recorded.
Hey Robert, which OBD readers do you like to use?
Hey Carlos, there are many brands to choose from and most of them do a good job. What I recommend is getting something that has the ability to graph live data. On this vehicle if I went with codes only it would have pointed me down the wrong path. So seeing live data was key. Also having bidirectional control is something I look for. It makes diagnosing some issues 10 times easier. But that ability makes the tool pretty expensive. At the least get something that graphs data 👍
How was this causing misfires on only one bank?
It wasn't. Both banks were affected but the engine computer was only detecting a fault on one bank. So it was giving me misleading scan tool information.