AutoJacob 34 Posted December 20, 2018 Evening all, I have one of these delightful things going out on Saturday. Started it up yesterday and it was smoking its t!ts off and misfiring, it now does not smoke but the misfire is still there and it seems to have a lack of power when the EML is illuminated. At first there was no EML and now there is an EML for P0106 Inlet manifold pressure sensor signal coherence, looks like it has already had a brand new coil and spark plugs (x3). Parts replaced so far by us: 3 coils, 3 spark plugs, Air filter, Vacuum control valve (solenoid), Injector rail. Head gasket isn't gone, I can see from viewing OBD data that there is a misfire on Cylinder 3 so we replaced the full fuel injector rail with a known working set, each injector is reading at 12.3 ohms. Has anyone else experienced this fault code before or do the symptoms sound similar? Share this post Link to post Share on other sites
Wayne_202 0 Posted December 20, 2018 Air leak any where? Share this post Link to post Share on other sites
Tony911 79 Posted December 20, 2018 What year is it? Share this post Link to post Share on other sites
AutoJacob 34 Posted December 21, 2018 It's a 2007, no air leaks although not smoked it yet! But no sign of any. Share this post Link to post Share on other sites
Tony911 79 Posted December 21, 2018 From our experience this will most likely be a costly repair. Just cut your losses and move on to the next one Share this post Link to post Share on other sites
AutoJacob 34 Posted December 21, 2018 3 minutes ago, Tony911 said: From our experience this will most likely be a costly repair. Just cut your losses and move on to the next one Not too fussed on what it takes, I've got a 10 plate crash damaged donor C1 here and can steal an engine or any electrical bits from it.. just looking for some pointers rather than playing parts darts. Share this post Link to post Share on other sites
ExCouncilJobsworth 27 Posted December 21, 2018 Sounds like its been parked up for a while? Reset the light and take it for a good blast on local roads and dual carriageways. It might need a good run to clear the shit out of it lol And am talking a good 10 miles! The French shit does misfire I must say hence I stay away Alternatively it could be cheap / dodgy new parts that have gone in and this DOES happen especially from euro farts 1 Share this post Link to post Share on other sites
Stalker 180 Posted December 21, 2018 Compression check? Share this post Link to post Share on other sites
Mojo121 229 Posted December 21, 2018 I don't think it's an ignition problem. What colour is the smoke? Sounds to me more like MAP sensor or EGR. Something is interrupting the smooth flow of air and fuel. The symptoms sound similar to every EGR we've changed to be honest. 7 hours ago, Tony911 said: From our experience this will most likely be a costly repair. Just cut your losses and move on to the next one Really? You'd bin a C1 with a misfire? What do you do when you get more complex problems? Share this post Link to post Share on other sites
pmpants 14 Posted December 21, 2018 We had an Aygo with same engine a while ago, running rough, smoking (but no fault codes), did compression test, swapped temp sensor, coil packs, plugs from another car we had here, then checked the tank.... The fuel smelt stronger of unleaded then fresh unleaded! Whipped the tank out and it had been missfuelled! Ran great on just unleaded!! Share this post Link to post Share on other sites
AutoJacob 34 Posted December 21, 2018 (edited) 2 hours ago, pmpants said: We had an Aygo with same engine a while ago, running rough, smoking (but no fault codes), did compression test, swapped temp sensor, coil packs, plugs from another car we had here, then checked the tank.... The fuel smelt stronger of unleaded then fresh unleaded! Whipped the tank out and it had been missfuelled! Ran great on just unleaded!! This is what I was thinking but my mechanic said he doesn't reckon it has.. going to drain it and put some fresh petrol in it would be nice to rule it out as it ran absolutely fine prior to this. 2 hours ago, Mojo121 said: I don't think it's an ignition problem. What colour is the smoke? Sounds to me more like MAP sensor or EGR. Something is interrupting the smooth flow of air and fuel. The symptoms sound similar to every EGR we've changed to be honest. Really? You'd bin a C1 with a misfire? What do you do when you get more complex problems? EGR is a good shout, I'll get this done along with the potential that it might have just been missfuelled. Edited December 21, 2018 by AutoJacob Share this post Link to post Share on other sites
It's me 611 Posted December 21, 2018 so your mechanic is depending on an electrical device only to ascertain a compression problem rather than a mechanical compression test unbelievable does he even know what a vacuum gauge is? Share this post Link to post Share on other sites
David Ayers 171 Posted December 21, 2018 2 hours ago, pmpants said: The fuel smelt stronger of unleaded then fresh unleaded Didn't know that was a thing! 1 Share this post Link to post Share on other sites
Dave2302 387 Posted December 21, 2018 36 minutes ago, boring dave said: so your mechanic is depending on an electrical device only to ascertain a compression problem rather than a mechanical compression test unbelievable does he even know what a vacuum gauge is? 101% knob, (the mechanic) Share this post Link to post Share on other sites
Stalker 180 Posted December 21, 2018 1 hour ago, boring dave said: so your mechanic is depending on an electrical device only to ascertain a compression problem rather than a mechanical compression test unbelievable does he even know what a vacuum gauge is? No, its far easier to plug a computer in that TELLS you how to fix it? 1 Share this post Link to post Share on other sites
Tom 164 Posted December 21, 2018 Has it dropped a valve? Really need a compression check! Share this post Link to post Share on other sites
Dave2302 387 Posted December 21, 2018 3 hours ago, Stalker said: No, its far easier to plug a computer in that TELLS you how to fix it? LOL, In actual fact MB Star does exactly that, "Guided Testing", you click on the fault code and it walks you through what the problem could be in order of probability I'm not aware of any other Diagnostic Machines at Dealer Level that do this, JLR comes close with it's SDD Program, (Symptom Driven Diagnostics), but like their Vehicles, it ain't a patch on the MB products Share this post Link to post Share on other sites
Stalker 180 Posted December 21, 2018 3 hours ago, Dave2302 said: LOL, In actual fact MB Star does exactly that, "Guided Testing", you click on the fault code and it walks you through what the problem could be in order of probability I'm not aware of any other Diagnostic Machines at Dealer Level that do this, JLR comes close with it's SDD Program, (Symptom Driven Diagnostics), but like their Vehicles, it ain't a patch on the MB products All of the dealers have guided diagnosis now. They are trying to make sure that the tech has to do as little thinking as possible and wastes 3 hours with a scope to fix a faulty cam sensor Share this post Link to post Share on other sites
have a word with the wife 299 Posted December 21, 2018 20 hours ago, AutoJacob said: Evening all, I have one of these delightful things going out on Saturday. Started it up yesterday and it was smoking its t!ts off and misfiring, it now does not smoke but the misfire is still there and it seems to have a lack of power when the EML is illuminated. At first there was no EML and now there is an EML for P0106 Inlet manifold pressure sensor signal coherence, looks like it has already had a brand new coil and spark plugs (x3). Parts replaced so far by us: 3 coils, 3 spark plugs, Air filter, Vacuum control valve (solenoid), Injector rail. Head gasket isn't gone, I can see from viewing OBD data that there is a misfire on Cylinder 3 so we replaced the full fuel injector rail with a known working set, each injector is reading at 12.3 ohms. Has anyone else experienced this fault code before or do the symptoms sound similar? smoke colour black or blue ? why haven't you changed the map sensor ? there will be a misfire if its smoking ? 9 hours ago, AutoJacob said: EGR is a good shout, I'll get this done along with the potential that it might have just been missfuelled. they dont have a egr Share this post Link to post Share on other sites
It's me 611 Posted December 22, 2018 13 hours ago, Stalker said: All of the dealers have guided diagnosis now. They are trying to make sure that the tech has to do as little thinking as possible and wastes 3 hours with a scope to fix a faulty cam sensor you cant get a simpler engine these days than these 3 pots but they need 3 things water oil petrol feed them bad stuff and like anything they will spit their dummy no cannybus on these too so good ole fashioned stand back plan of action sorts the real men out just watch the corner of the bonnet doesnt slice your head as you go in Share this post Link to post Share on other sites
justina3 518 Posted December 22, 2018 44 minutes ago, boring dave said: just watch the corner of the bonnet doesnt slice your head as you go in I did that in an auction once my head would not stop bleeding for ages, had to stand in the auction with a load of toilet paper holding my head together. Share this post Link to post Share on other sites
pmpants 14 Posted December 22, 2018 23 hours ago, David Ayers said: 23 hours ago, David Ayers said: Didn't know that was a thing! 23 hours ago, David Ayers said: I didn't either! No joke, I thought early on it could have been that someone had put a can of diesel in at BCA, but sniffing the filler it smelt so much of unleaded I ruled it out! Swapped loads of parts with another car we had in stock, but kept thinking "it's just like it's running on rubbish fuel" , bit the bullet and pulled the tank out (took about 5 mins) , then put the petrol in a clear glass and it was so much darker than fresh!! Share this post Link to post Share on other sites
AutoJacob 34 Posted December 22, 2018 Ok so here's where we are up to. Compression test cyl 1 190 psi, cyl 2 195 psi, cyl 3 185 psi. Replaced spark plugs, all three coils, drained the tank and filled with fresh fuel, replaced vacuum control valve, checked connectors for any corrosion, checked ECU for corrosion, replaced injector rail. New codes are P0300 misfire cylinder 3 and P0303 Random misfire on multiple cylinders. 3 hours ago, boring dave said: you cant get a simpler engine these days than these 3 pots but they need 3 things water oil petrol feed them bad stuff and like anything they will spit their dummy no cannybus on these too so good ole fashioned stand back plan of action sorts the real men out just watch the corner of the bonnet doesnt slice your head as you go in That's what we thought as well.. we have sold 20 - 30 of these little tin can cars this year and no problems what so ever. Share this post Link to post Share on other sites
Stalker 180 Posted December 22, 2018 2 hours ago, AutoJacob said: Ok so here's where we are up to. Compression test cyl 1 190 psi, cyl 2 195 psi, cyl 3 185 psi. Replaced spark plugs, all three coils, drained the tank and filled with fresh fuel, replaced vacuum control valve, checked connectors for any corrosion, checked ECU for corrosion, replaced injector rail. New codes are P0300 misfire cylinder 3 and P0303 Random misfire on multiple cylinders. That's what we thought as well.. we have sold 20 - 30 of these little tin can cars this year and no problems what so ever. Id swap injectors around, check them with a multimeter for high resistance / open circuit whilst you have them out. Swap 1 + 3 around to see if the misfire moves? Have you checked the inlet manifold for leaks? Share this post Link to post Share on other sites
have a word with the wife 299 Posted December 22, 2018 (edited) 3 hours ago, AutoJacob said: replaced vacuum control valve, what is this ? as i suggested / asked earlier, have you changed the map sensor ? why ? because the vacum control valve is NOT the map sensor ........... Edited December 22, 2018 by have a word with the wife because theres nowhere to park Share this post Link to post Share on other sites
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