Bmouth16v
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Registered: 1st Aug 13
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Ive just bought a 99 plate 1,6 sport one owner from new full service history a real nice car. However it has a missfire that i cant seem to sort.
So what i have done and whats happening:
No eml is on
It starts up runs on all four then suddenly splutters and misfires if revved up between 1500 - 3000 the misfire is worse but if driven in higher revs it clears. If in say fifth at 30 it will splutter again.
I have changed the plugs and the coilpack
Checked and disconnected the map sensor air temp sensor coolant temp sensor and nothing makes any difference.
I did however disconnect each injector plug one by one and 1, 3 and 4 dropped in revs quite substantialy and 2 made not much of a difference.
I did the paperclip test and it came up with various codes where id disconnected things but it also came up with code 0200 and 0443. Can anyone shed some light on those? I am thinking about getting some second hand injectors off a breaker tomorrow if anyone thinks the same?
Sorry for the essay but just best to explain it in full straight away so theres no confusion.
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corsa-torque
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Registered: 15th Mar 11
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Have you changed the leads? I've had one break down inside, but looking at it you wouldn't know anything was wrong.
0200 isn't a fault code, if its 0202, then that would suggest injector 2 is failing. Try swapping 2nd and 4th injector then code read. If it gives you 0204 you know it's down to that injector.
I have a fuel rail complete with injectors if you can't find any at your breakers.
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Generation
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Registered: 7th Jul 09
Location: Essex
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Sounds very much like an egr valve issue
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Bmouth16v
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Registered: 1st Aug 13
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I took each lead off one by one and held them against with rocker cover obviously with insulated pliers haha and each lead kicked out a good spark? I may have miscounted the amouth of flashes when i did the paperclip test. Thanks if i cant find one in a breakers ill certainly message you. And i though egr valves usual symptoms were harder to start lack of power etc? Didnt think theyd cause a misfire
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Generation
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Registered: 7th Jul 09
Location: Essex
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Nope, causes misfire. Blanked two off, for this, both fixed
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corsa-torque
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Registered: 15th Mar 11
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I'm sure I have an egr valve in my spares too if you didn't want to blank it.
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Pete_gsi
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Registered: 17th Jul 13
Location: Cheshire
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It is possible to be egr but i dont think thats the problem
Off what you said it no2 injector if it made no diffrence then thats the problem
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Bmouth16v
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Registered: 1st Aug 13
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Ok a quick update i took the plug off the egr and then fired her up and still the misfire is there and obviously a management light appeared. So im guessing thats leading towards the injector now?
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corsa-torque
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Registered: 15th Mar 11
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Egr not working properly may cause misfire, unplugging it will also stop it working so you might not have ruled it out. EML light will only display as you've unplugged the egr.
Have you tried swapping the injectors round?
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Bmouth16v
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Registered: 1st Aug 13
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Ok so i was able to borrow an injector off a engine and its made no difference. I changed the inlet gasket while i was there just in case that was the issue. I dont get why if i pull a lead out and then reconnect it will fire on all 4 for a miniute before it begins to splutter again. I guess its time to get that egr out. can it be freed and cleaned?
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Generation
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Registered: 7th Jul 09
Location: Essex
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If its faulty all te time, by unplugging it, it's still faulty so it would be the same.
I'm not saying its 100% the issue here, but if it hasn't broken already it more than likely will soon. They're shit
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Bmouth16v
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Registered: 1st Aug 13
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I made a plate up to blank the egr off fitted it fired it up and its still running like a bag of sh1t and its now chuffing guessing the gasket didnt seal grr starting to give up haha to many hours spent on this thing think im going to buy the blanking plate off ebay and go for a beer
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Bmouth16v
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Registered: 1st Aug 13
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Could someone send me the link to the one they use/ recommend
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Bmouth16v
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Registered: 1st Aug 13
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Ok so i kept the car at around 3k rpm and blue smokes appearing. which is oil so im guessing this missfire is more internal now :-( think it might be a breaker
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mattievRS
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Registered: 20th May 06
Location: Leicester
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Check the bottom pulley on the crank, it could have slipped which will enlarge the key way on it and cause the crank sensor to misread. The bottom pulley governs the fuelling and spark.
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Bmouth16v
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Registered: 1st Aug 13
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I shall look into this now and let you know of the outcome.
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Bmouth16v
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Registered: 1st Aug 13
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Taken the bottom pulley off and there doesnt seem to be any problems. Going to check the timing seens all thats left on is the timing covers. Just about going crazy over this!
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mattievRS
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Registered: 20th May 06
Location: Leicester
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try a different crank sensor on it and see?
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Bmouth16v
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Registered: 1st Aug 13
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Ive had the cambelt off retimed her cleaned the oil of the crank sensor thats on it checked the bottom pulley aswel as the key nothings sheered or stripped ive changed a lazy injector put new plugs a coil pack inlet manifold gasket taken the egr valve off made a plate but as i said before the gaskets chuffing. would this make it run exactly the same ie with a missfire? Cleaned the icv tried a coolant temp sensor im running out of ideas and money haha
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Generation
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Registered: 7th Jul 09
Location: Essex
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Buy a £3 gasket and blank it properly, certainly won't be helping either way
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Bmouth16v
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Registered: 1st Aug 13
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Theres no leak from the blanking plate anymore sorted that but its still misfiring. I have done a compression test and all are close readings so i know theres internal issues. I have however got quite a strong smell of petrol from the exhaust as if its running rich. Took the new plugs out and they are sooted so im thinking it could be the lambda sensor playing up? Sorry to be a pain guys im just getting rather baffled
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Bmouth16v
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Registered: 1st Aug 13
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No internal issues i mean*
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