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2008 renault trafic 2.0 115 misfire!!!!

Posted By VISVAN Tuesday, June 11, 2019 12:10:10 PM
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VISVAN
 Posted Tuesday, June 11, 2019 12:10:10 PM
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Hi all, Have just had local garage diagnose problem with my van... fault comes up as DF028 injector cylinder 3, control circuit, injector control, intermittent short circuit??.

when trying to gun it! it does not want to rev above about 3700--4000 popping & banging until I ease off.

Any suggestions guys & girls
Thema
 Posted Tuesday, June 11, 2019 1:44:13 PM
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What did your local garage say? They have the vehicle and they "diagnosed" the fault so they presumably know how to fix it.
If they don't then take it somewhere that DOES know what they're doing.
For myself I would GUESS (no more than that!) that you'll end up needing a new injector but there needs to be more testing done before it comes to that!

Peter
VISVAN
 Posted Tuesday, June 11, 2019 3:53:49 PM
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Thank you peter will try another garage & see what they say.



Cheers mate.
VISVAN
 Posted Thursday, June 13, 2019 5:33:59 AM
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Hi peter, Have decided to remove & replace #3 injector my self....But there seems to be some confusion as to which IS #3 Injector?
Is #1 cylinder at the chain end or at gearbox end???
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 Posted Thursday, June 13, 2019 4:51:45 PM
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visvan, that depends on what tool , the person that diagnosed it used,, But as a rule Renault's are number from the flywheel end.


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 Posted Thursday, June 13, 2019 6:50:24 PM
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To add make sure the injector is a good quality replacement as some "aftermarket" brands will leave you scratching your head.
Thema Marked As Answer
 Posted Friday, June 14, 2019 2:11:49 PM
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Um, I did say that I would GUESS you needed a new injector! Don't go trying to replace one without further testing! Don't forget the DTC says circuit, not injector. Although to be fair that's all the ECU can see. I would strongly suggest that a scope is needed on the injector to see what is actually happening.
But if you go ahead anyway I hope you're lucky getting the old one out, they can be pigs to shift. And IF that's what it comes to listen to laldog, if you buy cheap you get cheap.
Regard the numbering I always thought Renaults counted from the timing belt end, Peugeots from the flywheel? But do check that as well.

Peter
VISVAN
 Posted Monday, June 24, 2019 6:20:27 AM
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Thanx again for info peter, Had a guy come round (mobile injector puller) all he does all daylong.After i striped down top of engine ready for him to pull no3 injector being no3 from fly wheel end
and confirmed this from renault commercials.

when on arrival he run up engine & straight away said its not an injector... he then plugged in his
laptop & did a complete diagnostics & everything was bang on between parameters !!
So to move on it rev`s up runs smooth & nothing showing on the diagnostics?

Two days later it did it again! the engine for a split second cuts out and the STOP LIGHT & ENGINE
LIGHT FLASHED ON THEN OFF. Also when traveling along at about 40/50mph you can feel it holding back.



Have had a thought about past vans 08 TRANSIT changed the EGR valve & was good after that.
Could this be the problem??
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 Posted Monday, June 24, 2019 7:24:10 AM
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Injector numbering on French cars can be confusing. Best thing to do is unplug what you think is injector 3 (With Engine Off) and look or fault codes, then do that with what you believe is Injector 2.You will be able to make the faults codes come and go at will confirming your injector labels.

You may have to run the engine with the Injectors disconnected to get codes to register.

Please note, You can run the Engine for a very short time with a injector disconnected but NEVER disconnect an injector with it running. Always switch off, disconnect and then start it.

When your man came to pull the injector the engine was running well so of course the parameters will be correct however you could still have a intermittently faulty injector. the testing needs to take place when the fault is present. Any testing with the fault not present will be unlikely to help and add frustration & confusion.

For now you could do a few simple things, Wiggle test the wiring from ECU to injectors, make sure all connectors are clean and tight at both ends, wires are not chaffing and shorting.

Use a MEGGER Tester to test for wiring & injector integrity and insulation from earth.
Analyse Injector duration's using serial data or an amp clamp alongside an oscilloscope on Crank Sensor with RPM Math Channel and a pressure transducer on the common return pipe should reveal any weaknesses. These will require special tools and an experienced user to conduct and analyse the results accurately. A good technician equipped with the right tools may do that for you in 2-3 hours, being intermittent maybe 3-4 hours if it takes time to manifest.
Dependent on your circumstances that could be money well spent to get a first time accurate diagnosis with lots of graphic evidence to inspire confidence in that diagnosis.

Sorry to get all technical & Mumbo Jumbo on this but you do have a technical fault and being intermittent just makes it that much harder or more complex too catch definatively.

Easier still just keep driving it until it packs up altogether.

If it is the injector, and it quite likely will be, (lots in the media about these failing for fun) then the design strategy in the ECU will let you drive it on 3 cylinders.
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 Posted Tuesday, June 25, 2019 12:50:01 PM
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No. 3 on the 2.0 engine (m9r) is the third one away from the front pulley/timing chain end towards the flywheelno.1 nearest front pulley, no.4 nearest the flywheel
did the guy test the resistances individually on each injector?

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