Someone replaced two capacitors in my vehicles computer. They never checked polarity on one of them and it had blown out. I noticed a rattle in my computer when I removed it. As I knew that ment something was loose and could cause a grounding issue if I put it back that way, I opened the unit, noticing it had been pried open and revealed. It had a warrenty void sticker on it that was made of paper and didn't appear to be factory( it wasn't ). Whomever repaired this unit wasn't qualified to open a can of beans. A simple check of the ground confirmed the blown capacitor was wrong. It had blown the aluminum cap off but left the plastic wrapper on. That gave me a clue as the negative was wired to what appeared to be the wrong pad. They had replaced two capacitors. The other one was not in the same position, so they shouldn't have followed that one's position relative to the board. Reguardless, I fixed it and it appears to be fully functioning.
Hi there. I'm from Malaysia and I drive a 2010 Kia Forte 1.6. My car is stuck in 3rd gear and it bangs into reverse. A local workshop concluded that the ECU is at fault. I couriered the ECU to a specialist and they called me to say that the capacitors were leaking and they had replaced it. When I received and reinstalled the ECU I was frustrated that the problems were still there and 2 additional problems cropped up : No AC and the traction control off light was on! What could be the problem?
Hi Earl, I'm not an expert on that car and can't think not what the problem would be. Sorry I couldn't be of any help. Best if luck to you getting it fixed.
The life expectancy of these electrolytic capacitors vary. These are the first thing that goes bad. I have a 1950's electrolytic capacity checker which puts actual electrical load on these capacitors. I have found many out of tolerance & leaky capacitors because wear and tear and age. Repairing these capacitors will mostly likely bring the computer back to life.
Hi good man thanks for such an interesting post about ECU repair. May I know where I can get its schematic diagram.I Hope you could help me with this.my car would not start.
. hello, I have such a question, I have a 1995 Mitsubishi, it starts up, but it feels like it smells of gasoline from the exhaust pipe and the engine does not work, but after 10 minutes of work, it stops working , I take off the spark plugs and they are all in gasoline.after 5 minutes it starts up again and again after 5 minutes it stops itself. it could be ECU ?
Sounds like it could be. Could also be a sensor or wiring. Could be engine heat or electric current in a wire or device heating up and then creating a short or discontinuity condition.
I need help and was hoping you can lead me in the right direction. I have a 97 gst and there are 2 white ecu wires that have these exposed wires coming out of a green sheath that covers the 2 white wires. There are also 2 black wires with a white stripe that are not connected to anything. It's a mess and the schematic is not showing these wires or where they go. The car runs very rich as well. Even a picture or video of the wires would help me rewire this.
Sorry to say I'm not sure what those wires are off the top of my head. I checked my harness and have the same thing. I would have to look up the schematics. There is a website I remember I found that had a lot of good info on DSM wiring. I think it is references somewhere on like a main FAQ page or something of dsmtuners.com or dsmtalk.com there are a lot of good threads on wiring schematics on those forums as well www.dsmtuners.com/threads/the-1990-engine-control-wiring-harness.412841/ Search for an ECU pin out for your car and it should tell you what you need to know. Best of luck!
Dude I tried replacing the capacitors and now the car runs worse. It won’t go past 2.5k rpm and pops when being revved. Any way I can reset it? I have replaced caps with same capacitor ratings. I am also using a new ecu and I want to save this old ecu
Hi, I sent my ECU for repair as the transmission was stuck in 3rd (limp mode) due to capacitor leakage. However, when I received the ECU, the transmission was still stuck in 3rd. The ECU specialist told me to go to workshop to reset the DTC and that would solve the problem. Is this true? Thank you.
I don't know but clearing codes is easy enough to do and usually auto parts stores like autozone will do it for you for free, else unplugging the battery will usually do it.
dear i have 1jz Toyota crown 1993 model. i think i short circuit the fuel pump wires. now check light is gone and engine not starting i did following:- removed battery terminal and connected battery again after 10 minutes but engine light still off removed fuel pump again the engine light off please help
muhammad imran If you shorted out a wire you probably blee a fuse. Check all your fuses. Sometimes there arr two groups of fuses, one inside the car and one under the hood.
Hi i have 4A-FE 1757003213 12V NEED TO REPAIR ONE CAPACITOR WAS BARN REPLACE THAT SILL FUEL IS GIVEN MORE 2 INJECTOR CONTINUE SUPPLY FUEL WHAT CAN I DO NOW/
I don't remember for sure all what was not working but I think pretty much nothing was working including the injectors or coils firing. I plugged in my scan tool and it was not talking to it and if I remember correctly the check engine light was not coming on. If your capacitors failed like mine your results may vary depending on what the capacitor has leaked on and shorted out. If you can access your ECU is is easy enough to unscrew the cover and check to see if there is something obviously wrong with it like a leaking capacitor like I had or something that burnt up. A lot of times whatever is wrong will be very obvious but other times not. Best of luck.
Awesome video 👍 I think I’ll get my son to solder the capacitors. He’s an electrician in the Navy 🔌💡
Dude. You're a genius
Haha. I wouldn't go that far but thanks for the compliment 😊
Someone replaced two capacitors in my vehicles computer. They never checked polarity on one of them and it had blown out. I noticed a rattle in my computer when I removed it. As I knew that ment something was loose and could cause a grounding issue if I put it back that way, I opened the unit, noticing it had been pried open and revealed. It had a warrenty void sticker on it that was made of paper and didn't appear to be factory( it wasn't ). Whomever repaired this unit wasn't qualified to open a can of beans. A simple check of the ground confirmed the blown capacitor was wrong. It had blown the aluminum cap off but left the plastic wrapper on. That gave me a clue as the negative was wired to what appeared to be the wrong pad. They had replaced two capacitors. The other one was not in the same position, so they shouldn't have followed that one's position relative to the board. Reguardless, I fixed it and it appears to be fully functioning.
Sick test bench
Hi there. I'm from Malaysia and I drive a 2010 Kia Forte 1.6. My car is stuck in 3rd gear and it bangs into reverse.
A local workshop concluded that the ECU is at fault. I couriered the ECU to a specialist and they called me to say that the capacitors were leaking and they had replaced it. When I received and reinstalled the ECU I was frustrated that the problems were still there and 2 additional problems cropped up : No AC and the traction control off light was on! What could be the problem?
Hi Earl, I'm not an expert on that car and can't think not what the problem would be. Sorry I couldn't be of any help. Best if luck to you getting it fixed.
The life expectancy of these electrolytic capacitors vary. These are the first thing that goes bad. I have a 1950's electrolytic capacity checker which puts actual electrical load on these capacitors. I have found many out of tolerance & leaky capacitors because wear and tear and age. Repairing these capacitors will mostly likely bring the computer back to life.
Hi good man thanks for such an interesting post about ECU repair.
May I know where I can get its schematic diagram.I Hope you could help me with this.my car would not start.
Sorry I don't remember where I got the schematic. Probably an online DSM car forum.
Hello Are you using VCDS or VAG cable for diagnostic? Does it comptable with 2G's? thanks
. hello, I have such a question, I have a 1995 Mitsubishi, it starts up, but it feels like it smells of gasoline from the exhaust pipe and the engine does not work, but after 10 minutes of work, it stops working , I take off the spark plugs and they are all in gasoline.after 5 minutes it starts up again and again after 5 minutes it stops itself. it could be ECU ?
Sounds like it could be. Could also be a sensor or wiring. Could be engine heat or electric current in a wire or device heating up and then creating a short or discontinuity condition.
Did you experience unstable idling too? I must try this tutorial on my ecu.
No, in my case when I got the car it was not in running condition and I could not get it to start.
I need help and was hoping you can lead me in the right direction. I have a 97 gst and there are 2 white ecu wires that have these exposed wires coming out of a green sheath that covers the 2 white wires. There are also 2 black wires with a white stripe that are not connected to anything. It's a mess and the schematic is not showing these wires or where they go. The car runs very rich as well. Even a picture or video of the wires would help me rewire this.
Sorry to say I'm not sure what those wires are off the top of my head. I checked my harness and have the same thing. I would have to look up the schematics. There is a website I remember I found that had a lot of good info on DSM wiring. I think it is references somewhere on like a main FAQ page or something of dsmtuners.com or dsmtalk.com there are a lot of good threads on wiring schematics on those forums as well www.dsmtuners.com/threads/the-1990-engine-control-wiring-harness.412841/
Search for an ECU pin out for your car and it should tell you what you need to know. Best of luck!
I've been all over dsm sites. Others have had the same issue but don't show how to rewire them. Thanks for taking the time to help.
Dude I tried replacing the capacitors and now the car runs worse. It won’t go past 2.5k rpm and pops when being revved. Any way I can reset it? I have replaced caps with same capacitor ratings. I am also using a new ecu and I want to save this old ecu
Sorry I don't know what it could be. All I can say is make sure you installed the caps in the correct polarity and make sure the board is clean.
Have you ever socketed the eprom chip...
No I haven't.
Hi, I sent my ECU for repair as the transmission was stuck in 3rd (limp mode) due to capacitor leakage. However, when I received the ECU, the transmission was still stuck in 3rd. The ECU specialist told me to go to workshop to reset the DTC and that would solve the problem. Is this true? Thank you.
I don't know but clearing codes is easy enough to do and usually auto parts stores like autozone will do it for you for free, else unplugging the battery will usually do it.
Hey man can you message me what the numbers are on top of the d2 component.. It’s burnt up and can’t get it off of it
Sorry man I don't have access to it right now.
dear i have 1jz Toyota crown 1993 model. i think i short circuit the fuel pump wires. now check light is gone and engine not starting
i did following:-
removed battery terminal and connected battery again after 10 minutes but engine light still off
removed fuel pump again the engine light off
please help
muhammad imran If you shorted out a wire you probably blee a fuse. Check all your fuses. Sometimes there arr two groups of fuses, one inside the car and one under the hood.
I have 1992dodger stealth RT where can I get the capacity.
Good job
Hi i have 4A-FE 1757003213 12V NEED TO REPAIR ONE CAPACITOR WAS BARN REPLACE THAT SILL FUEL IS GIVEN MORE 2 INJECTOR CONTINUE SUPPLY FUEL WHAT CAN I DO NOW/
Sorry I don't understand. Can you restate your question.
Hi! I'm having issues with all four injectors in my car, I've been told ist the ECU. What was the problem with your car?
I don't remember for sure all what was not working but I think pretty much nothing was working including the injectors or coils firing. I plugged in my scan tool and it was not talking to it and if I remember correctly the check engine light was not coming on. If your capacitors failed like mine your results may vary depending on what the capacitor has leaked on and shorted out. If you can access your ECU is is easy enough to unscrew the cover and check to see if there is something obviously wrong with it like a leaking capacitor like I had or something that burnt up. A lot of times whatever is wrong will be very obvious but other times not. Best of luck.
@@Goldenfab at that time what problem you facing in car , any communication lost related problem in this case?
@@harshkhy nothing was working.
Check RusEFI. ECU ...
What this problem sir ?
?
Where can i buy the capasitors ?
Thank you man
ebay
whats the capacitor? 22mF 50V ???
jax sin I forget what the capacitance was. The old one will say on it.
Goldenstein Engineering and Fabrication LLC i dont understand?
What did you clean the board board with to remove the blown capacitors liquid?
I don't remember. Probably isopropyl alcohol.
I came across this video by random but as luck would have it I need to replace my capacitors cause they're having problems. Thanks
@@maypolthedruidful what problem came in your case?
@@harshkhy improper idle and random misfires
Make more vids on the 4g63 rotary head. Lol
Sure want to be doing that. Keeping busy with other projects at the moment. I still plan to finish that rotary head.