Smart Fortwo 451 1.0l crank no start... not fixed, but diagnosed!
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- Опубліковано 6 лип 2024
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Hi
So, this Smart came to me as a crank no start...
Unfortunately, I couldn't get it to run, but, diagnosed the reason why would not start...
Follow me on this video to find out how I tested it, and what was the problem...
Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching! - Авто та транспорт
Engines quite happily run on very low compression if it has everything to make it run and the low compression is relatively even.
I remember as an apprentice we had a guy come into the shop in a Holden HQ ute with a clutch problem after he had replaced the clutch himself.
He wanted us to fix the clutch and give the engine a good going over .
The ute had done some insane amount of miles and was pretty tired .
New plugs, leads , points and condenser and an adjustment to the carburetor and she was running like a champ, quiet and smooth.
Plenty of blow by so I checked the compression and found all 6 cylinders only about 50 psi .
Done a wet check and compression sky rocketed .
So Luis , the low compression is not good and I think it would have tried to go given it had spark an fuel, but i reckon its slipped on the cam timing and munted the valves or its been severely over heated and blown the head gasket between the cylinders.
By the way, I could not see any spark on those plugs even when you shaded the sun.
I only saw a very random spark on the spark tester .
You know you have to follow up on this fault and not leave us in suspense.
N
Hi
It was definitely spark... trust me!
Unfortunately this has been recorded few months ago... I can try to find out what was wrong with it...
I don't tend to undertake jobs like this, due to the poor conditions working from the driveway...
Thank you for watching and for your comment!
very good to know how to test the sparks and compression and make right comments , thanks a lot
I like that how you make the compression test! All plugs removed, no variables. Many mechanics does not understand that, if they remove only 1 plug it shows the bad cylinder result even worse. No variables, you get the real readings. The easy test may be is to check quickly the timing on scope. Get the crank, cam and secondary windings reading to the screen and it should show the story within minutes. Actually 2 signals should be good enough. Or leak down test with smoke. This is too bullet proof. All 4 cylinders, it must be very bad service history if timing is not off.
About 1 month ago I worked with customer car. The complaint was misfire. I removed all the spark plugs, cylinder 1 and 4 test result was 50PSI less than 2 and 3.
Thank you!
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Thanks!
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Trouble is that when you are the genius go to guy that fixes everything, then sooner or later a pile of bits pulled out of a scrap yard will be sent to test you. Great video for the what to look for under a bonnet before you walk away info.
Indeed... lol
Thank you for watching and for your comment!
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As soon as I heard the engine turning it sounded like very low compression, quiet and spinning faster than it should.
Also even without a spark, easy start will run a petrol engine. So at the point you used easy start it was a certain that it was a compression issue for me.
On another note, your videos are great and I thank you very much for all you do.
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Thank you for watching and for your comment!
Thanks for sharing Bro👍
Interesting diag, for various reasons sometimes we cannot fix'em all😉
But, at least you found the cause of no start, which is important for us👍
Stay Safe❤
Thanks!
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Not the first time I've seen this . A breaker has 2 cars . One is maybe newer with a bad engine and the other older with a good engine . Do a crappy engine swap and they can sell a newer second hand car with a good engine . The other goes to auction as a no runner but cranking and at auction you buy as is so no refund or returns . This is called doing business . Auctions are for pro's so you buy with the worst case scenario ( engine swap ) in mind . Sometimes those pro's let a friend go with them to buy a " cheap " car . Maybe in this case they gambled and lost because a real pro doesn't gamble at auction . He could only have been lucky if the car would have started . No tears are shed here . Got what they paid for and you did a conclusive diagnose . Good work .
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A very plausible scenario...
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Good logical troubleshooting again. Thanks for sharing.
Thanks!
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Definitely an “ohh dear” moment when the first compression test happened.
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Indeed...
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And when he cranked it over at the start of the video it sounded like an old lawn mower 😂
That engine looks like it was taken out of the car and the old owner saw it was in bad shape so they sold it to another person
Thank you for another great video!!!
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Thanks!
Hi. Can You help. How to retrive pin code for ECU MagnetiMarelli 4mv from Skoda Fabia 1 1.4 petrol BBY?
Very interesting.. Its not one of those smart engines that has two plugs per cylinder is it. Although as i remember they have they coils and each one has two ht leads...i was thinking someone had left the other 3 that are usualy behind the bumper loose...good diag though.
well done bro great diagnose
Thanks!
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Very very good job man!
Thanks!
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Pico with WPS would come in handy for in cylinder cranking compression waveform to check valve O/C events to see if timing is the culprit. Ask santa, you never know your luck Luis.😉😉
I could have checked the timing with my scope... either way was not a job for me really...🤪
Thank you for watching and for your comment!
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71hp? That's way more than I thought these would have. I suppose they're fairly quickly accelerating things. Though I guess those are much heavier too than many think.
Hi , I enjoy watching your videos all the time , but in this case you could do a final check by squatting a little engine oil in each cylinders, then you replace all spark plugs, that way you would regain compression and the engine would start .
Yes I totally get that... and I already admitted that I should have done it...
Still, that wouldn't fix the problem... 🤪
Thank you for watching and for your comment!
Thanks for the video. At 56k miles my smart 450 lost some power. Rough running on tick over speeds and engine light on. Found that compressions were 230 psi, 175 psi and 75 psi on Number three cylinder. Interested if you did the engine out and found why low compression?
No I never removed the engine, nor looked any further...
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Big job ahead of this one mate nevertheless dignostic done 👍👍👍.. One the things that I take pride is to leave every car the same way I found it or better , meaning disassembling things in an organised manner and not having anything left in the end for example screws, bolts etc ... Annoying to see how some cars are treated 🥵😬
Indeed...
Same way here...
Hate as well when looms are taken out from their place, and not put back...😔
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Have they forgotten about that Artipad? You've had it a while 🤣🤣
LoL...
Old videos...
I don't have it for a long time...
Thank you for watching!
All cylinders the same means timing is out. Check timing marks, and if they're ok remove the rocker cover and check the journals on camshaft.
Possibly...
Thank you for watching and for your comment!
ewd wiring diagram Renault Have you used it before and is it good at tracking down faults?What do you think of it. Thank you so much
Yes... I have used many times..
Thank you for watching!
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Aux belt is the starter belt and it slips on starter as it’s loose
merci beaucoup
même je parle pas anglais j'ai pris beaucoup de chose bon courage
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What’s that diagnostic machine called ? Where did u buy that from ?
Is called Artipad I
I didn't bought it... I was just trying it...
Was lent to me by diagnostics connections...
Just google it...
Thank you for watching and for your comment!
good job bro 🌷😘
Thank you!
I had the same problem..changed the crank shaft sensor..and it work again as normal.
Lucky you!
Your problem was different then...
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I'm an optimist, I'm sure the engine is okay, it's just badly off timing :) please let us know what was the cause of low compression if you do find out. Also why did the clutch fault occur? Thanks for sharing , we really appreciate the steps especially listening to the engine cranking at the exhaust. Great content as always.
I will if I find out...😊
Thank you for watching and for your comment!
JUST A THOUGHT , with all the cranking from where it came from and from you don't you think the cylinders might have been fuel washed because you did say you smelled fuel and it did not appear as if you disconnected any of the injectors and you showed the fuel pump was running added teaspoons of oil to each cylinder to see if you may have gotten a change in comparison should have been done . Just my two cents thanks for your time .
Yes... I probably should have done a wet compression test...
But still, wouldn't be a fix... in my opinion...
Even dry, should have enough compression to start...
I think...🤔
Thank you for watching and for your comment!
@@neilmurphy845
Just one correction... this was not the same car... 😉
Thank you for watching and for your comment!
@@LMAutoRepairs sorry I thought it was it looked identical to the one the last time and I remember the knocking noise from the other one so I thought I was sure it was the same car
@@neilmurphy845
No worries...
No was a different one... had a few of these with different issues...
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if that was a scrapyard engine ,what I have seen in the past was the valves and piston rings get dry over time,
how we got around this was spray a small amount of engine oil into the cylinder, then turn the engine over if this does not bring the compression up
we put another small amount, (tea spoon amount) into cylinder, then put some old spark plugs back in, turn engine over, sometimes it takes a few attempts to get it up to somewhere near enough compression
Yes... i know about the dry and wet compression test... I guess you are right.. i probably should have done both...🤔
Either way, something was wrong...
Thank you for watching and for your comment!
I had my days with scrapyard engines, i hate them, don't know what you are getting,
i enjoy your videos, the information you give, is not available elsewhere, and is very informative
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diagnose
you did will help some one with this👍
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Thanks!
For watching and for your comment!
@@LMAutoRepairs changed my youtube name to maxthecaddy and not tim rute
@@maxthecaddy8451
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does it have any oil in the sump
Yes... I remember checking that...😊
Thank you for watching and for your comment!
This is like the time has problem or camshaft I don't think the Engine has problem because all celender had low pressure
Probably...
Thank you for watching and for your comment!
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Hello
This car, Does It have a timing belt or chain?
Chain...
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Hi that will be valve and seats common problem they get badly pitted and in some occasions the head of the valve comes off also rings (cylinders) are not to clever either had to rebuild engine on my friends vehicle
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Thank you for watching and for your comment!
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I don't know if that's a timing belt/interference engine but I'm wondering if a belt broke and bent valves and somebody just threw a new belt on without checking.
It is a chain... but yes, that could have happened...🤷♂️
Thank you for watching and for your comment!
Yeah or itbl ran out of oil or judging by the flashing spanner lights the oil was never changed the car was never taken care of
I have been told that the ignition timing is set by the ECU detecting the slowdown on cranking as the compression rises, if this is the case would a lack of compression make it impossible for the timing to be set ? Hence no start.
Yes, well, the ecu adjusts the timing, but if the engine is bad and has no compression, it does not really matter how much the ecu tries to adjust...
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@@LMAutoRepairs Thanks for your prompt reply, I could do with your help with my 02 smartcar, not starting, has fuel and spark but timing moves all the time.
A slack/stretched chain?
Have you scanned the car to see if there is any codes?
Can we see cam / crank correlation waveform? Oil sump pressure waveform? Intake manifold pressure waveform?
The no compression to me is enough...
The why no compression is not for to investigate... if that makes sense...
Thank you for watching!
LM Auto Repairs I tend to be critic in comments I know. Of course depends how far your agreements meant to diagnose. But to me, the diagnostic it’s not done yet.
@@liviu2004
It is to me...
The no start is due to no compression...
The why no compression, is a different diagnosis... and as I said... not for me...
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@@liviu2004 🤣🤣🤣
My smart has the absolute same problem. Do you fixed it? and when, how? Thanks for the great vid and all the steps, ill copied all :)
Hi
No, I didn't, what the owner decided to do with it I don't really know...
But I would say it needed the engine out and rebuild...
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I heard it at the beginning when you placed the camera on the exhaust that the engine has no compression what's so ever 🤣
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But had to go through the testing process...😉
Thank you for watching and for your comment!
Yeah remind me of an old lawn mower
I have just sorted my Smart forfour today having been fine it broke down and was recovered by the AA man he said the Fuel pump has gone It was cranking well but not starting ,i squirted easy start in the carb and it run for a few second , so i checked the fuel pump fuse which was fine ,I noticed that a big brown connector was not pushed in fully ,so i pushed it in and tried again and the car was back to normal ,its usualy some thing or nothing , I was about to take out the fuel pump etc .. Phew
Good call...
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I have the same problem . was it out of timing?
Don't know... car went and I don't know what was the outcome... sorry...
Thank you for watching!
I have the same problem as well..a week ago..i took it to the mechanic..he said its faulty crank shaft sensor..so i change it..it work for about 2 days..and today its doing the same thing..ill tow it tomorrow to him 🤦♂️,, nano dantas please did you figure out whats wrong with it..it will really help me..thanks
Needs a rebuild of the engine I’m afraid,possible blown piston on all 3 cylinders
Possibly...
Thank you for watching!
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Mine's doing this exactly same thing. I'm guessing it's the fuel injectors or fuel pump on mine. Apparently not unusual with this model and year.
Hope you find the issue...
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@@LMAutoRepairs Fingers crossed! Thanks for the vid, because I was looking in a completely different direction - gave me something else to look at.
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Thanks!
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Sounds like a old lawnmower 😂
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Glad you didn’t do a relative compression first, with all cylinders at around 50 psi the fault then wouldn’t have shown up sending you off in an entirely different direction.
Indeed...
Not very often I used that test...
But yes... you are correct...😊
Thank you for watching and for your comment!
The flashing spanner light can also mean a fault with the gearbox.
Possibly...
Thank you for watching!
My smart did same exact thing I bought a brand new gearbox and all was fixed it started right up.. just a side note the double blinking wrench it's just for general maintenance reminder
Is the clutch actuator defanlly
Not sure what you mean...🤔
Thank you for watching!
Understand that you do not want to get involved in fixing the compression issue. I would have wanted to pressurise cylinders to hear whether it is a bore or valve problem, out of interest.
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its not getting fuel ,probably flooded or out of juice
No it was not...
What do you mean you can't fix it with no parts required 😳
LoL
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Smart has never made a profit. Mercedes has tried to sell the company for many years. These little cars are made of rubbish and just wear away in no time.
Thank you for watching and for your comment!
Yeah why buy a smart car when you could buy a micra or a Yaris for the same price and they'll actually go forever or a Clio they're pretty good cars too golf Polo the list is endless of gray cars why would you buy a useless car like that
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Fuel pump
overheated, someone skimmed the head, put a new head gasket but never addressed the fried and stuck piston rings and leaking intake and exhaust valves....
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Possibly...
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not possibly.... 100%... I just refurbished this engine.... see in video the vin is entered.... I got this car last year
Small world...
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just passed mot today and it's close to mint.....
any way of contacting the previous owner? the place I got it from had no key or V5
I know the person that owned the car at the time, but the car was for sale, so I am guessing they must have sold it somehow with the problem... if only now is being sorted...
How did you got hold of the car anyway, who you got it from are surely the previous owner, or was at auction?
Crankshaft locked and needed to open up.
Renault twingo engines
Really
Nope. Mitsubishi.
@@michaelglynn2638 yah was thinking Renault engines are not so junk
I had an older smart,kept it 6 months.Absolute junk,never again