I actually think there is two separate faults here. But there really bad for chains and it's waste of time going any further before putting a new chain kit in first. Good video as always Luis 🤟
Nailed it Luis, just another example for the mid-2000s manufacturer bullshit along the lines of "modern engines are sooo super well built they can do with long-life oil, lifetime timing chain and no temp gauge on the dash". Efficient and spot on diagnostics as always.
Looks like 3 tooth on crankshaft ring to me. Good known is 4.5 teeth yours is 7 or 8 teeth. It is small resolution on scope. Good find and nice video as always.
Hi Louis The oil switch. When I come across this "capillary" attraction on oil and screen pumps I cut the wire and rejoin with a good long solder joint. This should block any capillary action passing into the eco/bcm
I think the image you compared the waveform to is not for the same engine/setup. The crank sensor signal on the gap generates a different response compared to your capture, ie it is mirrored. You can see it at 14:06 ~ 14:07
Just because the scope from the sample I have found was setup slightly different, does not mean the signals are wrong... That's all it was, scope setup differently... 👍👍👍
Good morning Luis, great diagnosis as always and pleased you could positively recommend a fix to the customer. Just out of interest: not sure of the car’s mileage but would the timing chain issue had been picked up for the manufacture serving ? Thanks
Hi Louis, glad I stumbled upon your video. My step son has just passed his test and the car (Corsa)we bought from a dealer a year ago has now started missing on cylinder 4. Apparently it hasn’t got compression but I’m going to check myself. Oil is present in all of the plugs just like in this video and I thought it was odd yesterday when I was checking injectors etc etc. do you think a chain/ecu would resolve this issue or is it an engine rebuild in your opinion.!? Great channel by the way!!
Difficult to say without checking... Do you checks, and rectify what you see wrong before go the route of strip the entire engine... Thank you for watching and for your comment! 👍👍👍
Great video and diagnosis. It does seem like the timing is off and generally it's a timing issue when the fault code refers to crank and cam correlation. Out of interest, does the car have a hard start as well? because that could also be a symptom when the timing is off.
Hi, I have a corsa c 1.2 twinport, I've tried 5 different garages to fix my p0300, p0304 misfire, coilpacks chandler and spark plugs, ecu tested and good, changed crankshaft and camshaft sensors, live diagnostic just says misfire, inlet manifold off and swirlflaps checked, rocker cover off and cams checked and tightened, egr has been removed and checked for soot and it was clean, I'm running out of options and have spent over £700 and still not found problem, what would be your suggestion, any help is much appreciated,many thanks steve
Hi Couple things that comes to my mind... Parts replaced, aftermarket or genuine? Also, looks like that has been to the parts cannon... why was all those parts replaced? Have they been diagnosed as bad, or qas just replaced in the hope that would fix the problem? Has a compression test been done? Timing, has been checked? 👍👍👍
Although you have compression, I would still check the timing... Check also fuel pressure... And again, could be some of the parts you replaced being fault... you need to proper test every system to see where the problem is... it cannot be many things causing a misfiring...
Slipped timing chain drive gear, if it's the same as the one I did recently they chew the keyway off the inside of the gear, luckily the gear is only a few quid.
The chains on these are glorious. Done plenty. Easy enough job. Customers always seem to want the cheap china eBay chains tho 🤷. Genuine are junk so I dont know what they expect the monkey metal ones to be like. Check front O2 sensor plug first. If oil has gone from oil pressure switch to ECU it usually carries on up to the front O2 sensor plug if it's been doing it for a while. Just easier to get a heads up on the likelihood of the length of time the ECU has been getting fed oil. If it's been to Vauxhall first, it's likely to have clean engine oil in every sensor plug all over the engine. Unless it's just our main dealer that does this to con £2640 from every unsuspecting customer.
Ecotec Z14XEP petrol. Starts won't run. Compression around 200psi Fuel pressure 50psi New plugs firing (inverted coil, connected plugs to battery ground). Cleaned Maf, egr, throttle body. Haven't checked injectors. I changed oil pressure switch which was very oily. (And cam sensor and rank sensor, and fuel pump and filter). Didn't know it might have sent oil to ECU. Had been told chains can't jump, clearly false, and bought kit anyway. I get from comments here that timing if out, can't be adjusted, the chain has stretched and needs to be chainged..(pun). Like here, I'm thinking timing or ECU. Auto-electrician told me NOT to remove ECU for testing (for reasons I didn't understand because everyone speaks French here 😢 It's France 😂). But you imply there's no risk in doing that. I've got a Xtool D7 just to fix this car but 3 weeks later and emails every 3 days with China and all it can do is identify the vehicle. Mechanic coming to take car to his garage. From what I understand the timing can only be checked by this method if the engine is running (and of course if the scanner is working). Otherwise someone has to do the dirty work ("not my cup of tea" you said😢). Thanks for video.
Hello, I also have a corsa d 2009 Z12XEP and I have a po300 and p0303 error and you wouldn't mess with the car. I changed the spark plugs, the coil and it still does the same thing. Please help me with an advice
Diagnosis seems reasonable, though one thing bugs me quite a bit. If chain is stretched or jumped, shouldn't it really run badly from the start every single time? If it heard correctly it ran few minutes perfectly. Though maybe it could be such close call thing that it goes into fault after metals heat up. At that point it would be a good day to fill lottery ticket 🙂 Addition: shouldn't misfire also be reported on all cylinders if chain issue? Or does it just trigger based on trigger wheels first "fault" position and reports that? If so it's bit flawed obd error reporting there?
I have error of bcm in diagnosis but in real I have a blinking light of glow plug in dash and poor fuel economy in my corsa d 2008. It's consumers 10 litre per 100 km and RPM jumps from 800 to 1000 . Please help if anyone have any idea about this problm
my engine sound is the same, when i accelerate i got a lot of vibration at 1500rpm and aboved 2000 rpm the engine is sweet, also it does sound like a bicycle :/
@@LMAutoRepairs Im planning to do on my ones long time ago, and you come with that problem...so, why not to share ideas for solving problems like you do.
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
I actually think there is two separate faults here. But there really bad for chains and it's waste of time going any further before putting a new chain kit in first. Good video as always Luis 🤟
I think you're right!
😊
👍👍👍
@@LMAutoRepairs where are you based mate? Thank you
Nailed it Luis, just another example for the mid-2000s manufacturer bullshit along the lines of "modern engines are sooo super well built they can do with long-life oil, lifetime timing chain and no temp gauge on the dash". Efficient and spot on diagnostics as always.
😊
Thanks!
👍👍👍
Nice to see that one of my waveforms on Rotkee have been of use 👍
☺️
Thank you for sharing!
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well done luis you always get it spot on
😊
👍👍👍
Looks like 3 tooth on crankshaft ring to me. Good known is 4.5 teeth yours is 7 or 8 teeth. It is small resolution on scope. Good find and nice video as always.
☺️
Thanks!
👍👍👍
Hi Louis The oil switch. When I come across this "capillary" attraction on oil and screen pumps I cut the wire and rejoin with a good long solder joint. This should block any capillary action passing into the eco/bcm
😊
Nice solution...
👍👍👍
I think the image you compared the waveform to is not for the same engine/setup. The crank sensor signal on the gap generates a different response compared to your capture, ie it is mirrored. You can see it at 14:06 ~ 14:07
Just because the scope from the sample I have found was setup slightly different, does not mean the signals are wrong...
That's all it was, scope setup differently...
👍👍👍
Parts Cannon, Love it
☺️
👍👍👍
Good morning Luis, great diagnosis as always and pleased you could positively recommend a fix to the customer. Just out of interest: not sure of the car’s mileage but would the timing chain issue had been picked up for the manufacture serving ? Thanks
Good question, not sure about that...
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Good job Luis, is that a common problem with vauxhall timing chains they seem to prematurely stretch
☺️
👍👍👍
Hi Louis, glad I stumbled upon your video. My step son has just passed his test and the car (Corsa)we bought from a dealer a year ago has now started missing on cylinder 4. Apparently it hasn’t got compression but I’m going to check myself. Oil is present in all of the plugs just like in this video and I thought it was odd yesterday when I was checking injectors etc etc. do you think a chain/ecu would resolve this issue or is it an engine rebuild in your opinion.!? Great channel by the way!!
Difficult to say without checking...
Do you checks, and rectify what you see wrong before go the route of strip the entire engine...
Thank you for watching and for your comment!
👍👍👍
@@LMAutoRepairs thanks for the response. I checked with compression gauge today and it really is low in cylinder 4. Not good!!😳
😬
No, is not...
Great video and diagnosis. It does seem like the timing is off and generally it's a timing issue when the fault code refers to crank and cam correlation. Out of interest, does the car have a hard start as well? because that could also be a symptom when the timing is off.
Hi
Don't think it had an hard start, buy I can't really remember that now...
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@@LMAutoRepairs Alright. Otherwise great work you are doing there. I am learning a lot and inspired by these videos
good morning luis thank you for saying about the oil switch i didnt know they leaked learn something every time keep up the good work
😊
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Hi, I have a corsa c 1.2 twinport, I've tried 5 different garages to fix my p0300, p0304 misfire, coilpacks chandler and spark plugs, ecu tested and good, changed crankshaft and camshaft sensors, live diagnostic just says misfire, inlet manifold off and swirlflaps checked, rocker cover off and cams checked and tightened, egr has been removed and checked for soot and it was clean, I'm running out of options and have spent over £700 and still not found problem, what would be your suggestion, any help is much appreciated,many thanks steve
Changed not chandler lol#
Hi
Couple things that comes to my mind...
Parts replaced, aftermarket or genuine?
Also, looks like that has been to the parts cannon... why was all those parts replaced?
Have they been diagnosed as bad, or qas just replaced in the hope that would fix the problem?
Has a compression test been done?
Timing, has been checked?
👍👍👍
Hi yes compression 200psi all cylinders, and parts changed to try find problem, timing not checked yet ?
Although you have compression, I would still check the timing...
Check also fuel pressure...
And again, could be some of the parts you replaced being fault... you need to proper test every system to see where the problem is... it cannot be many things causing a misfiring...
@LM Auto Repairs I bet you no where near Kent uk, are you?
Slipped timing chain drive gear, if it's the same as the one I did recently they chew the keyway off the inside of the gear, luckily the gear is only a few quid.
Possibly...
👍👍👍
The chains on these are glorious. Done plenty. Easy enough job. Customers always seem to want the cheap china eBay chains tho 🤷. Genuine are junk so I dont know what they expect the monkey metal ones to be like.
Check front O2 sensor plug first. If oil has gone from oil pressure switch to ECU it usually carries on up to the front O2 sensor plug if it's been doing it for a while. Just easier to get a heads up on the likelihood of the length of time the ECU has been getting fed oil.
If it's been to Vauxhall first, it's likely to have clean engine oil in every sensor plug all over the engine. Unless it's just our main dealer that does this to con £2640 from every unsuspecting customer.
☺️
👍👍👍
Ecotec Z14XEP petrol. Starts won't run. Compression around 200psi
Fuel pressure 50psi
New plugs firing (inverted coil, connected plugs to battery ground). Cleaned Maf, egr, throttle body. Haven't checked injectors.
I changed oil pressure switch which was very oily. (And cam sensor and rank sensor, and fuel pump and filter). Didn't know it might have sent oil to ECU. Had been told chains can't jump, clearly false, and bought kit anyway. I get from comments here that timing if out, can't be adjusted, the chain has stretched and needs to be chainged..(pun).
Like here, I'm thinking timing or ECU. Auto-electrician told me NOT to remove ECU for testing (for reasons I didn't understand because everyone speaks French here 😢 It's France 😂). But you imply there's no risk in doing that.
I've got a Xtool D7 just to fix this car but 3 weeks later and emails every 3 days with China and all it can do is identify the vehicle. Mechanic coming to take car to his garage.
From what I understand the timing can only be checked by this method if the engine is running (and of course if the scanner is working). Otherwise someone has to do the dirty work ("not my cup of tea" you said😢).
Thanks for video.
Timing can be checked mechanically, or with the scope...
Hope you find the issue with yours!
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Hey! This clip is made before you change or remove the protective film on the multimeter!
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Before...
😁
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Hello, I also have a corsa d 2009 Z12XEP and I have a po300 and p0303 error and you wouldn't mess with the car. I changed the spark plugs, the coil and it still does the same thing. Please help me with an advice
Well, check timing and compression...
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@LMAutoRepairs On cylinder 1 is 12 on cylinder 2 11 on cylinder 3 11.3 on cylinder 4 10.5
@mihaivalentin570
Timing?
??? Wath timing....?
@mihaivalentin570
Have you actually watched the video???
Had my coil pack replaced yesterday. The car is smooth as silk after that and a full service.
Diagnosis seems reasonable, though one thing bugs me quite a bit. If chain is stretched or jumped, shouldn't it really run badly from the start every single time? If it heard correctly it ran few minutes perfectly. Though maybe it could be such close call thing that it goes into fault after metals heat up. At that point it would be a good day to fill lottery ticket 🙂
Addition: shouldn't misfire also be reported on all cylinders if chain issue? Or does it just trigger based on trigger wheels first "fault" position and reports that? If so it's bit flawed obd error reporting there?
I see your point. 👍 Gotta also wonder if this thing is VVT are some sort of timing actuation by the PCM. Maybe there will be an update video?
Where did u get your good known pattern from
Google... can't remember now where...
But might was on rotkee...
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well done, good dia
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Thanks!
We say "Bom dia"...
"Bom" = Good
"Dia" = Day
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Did it have any chain rattle at start up
Not that I recall...
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@@LMAutoRepairs that's mad I would have always thought they'd rattle before they go.
I have error of bcm in diagnosis but in real I have a blinking light of glow plug in dash and poor fuel economy in my corsa d 2008. It's consumers 10 litre per 100 km and RPM jumps from 800 to 1000 . Please help if anyone have any idea about this problm
So was it a slipped/ stretched timing chain or has someone been in the engine and put it back wrong?
Not sure.... if someone worked on it and left it wrong... mors likely a stretched chain...
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my engine sound is the same, when i accelerate i got a lot of vibration at 1500rpm and aboved 2000 rpm the engine is sweet, also it does sound like a bicycle :/
Maybe is good enough to buy screen protector for mobile phone and somebody to customize on cutter or laser with that holes for knobs...
Not a bad idea...
🤔
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@@LMAutoRepairs Im planning to do on my ones long time ago, and you come with that problem...so, why not to share ideas for solving problems like you do.
I actually now have a new screen protector on it... I put something on the community page... check it out...
😉
What is a hybrid ECU
Those ecus that the chips are not encapsulated...
Usually fitted on a kind of ceramic PCB...
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👍🏻👍🏻
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Thanks!
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Get the belts back...
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Super
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Who cares about corsa s ..... who cares about misfires???
They have to care about MR. LOUIS!
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