Exotic Posted June 8, 2012 Share Posted June 8, 2012 Just happened yesterday where at the traffic lights I noticed it just stalled from neutral, and to keep the engine running now I have to rev it above 1000RPM. It doesn't sound right and is kind of coughing and it feels very jerky. On the motorways at higher speeds it is not accelerating as it should and feels very slow (don't think it goes to high revs). Also the EM light is now on, any ideas what the issue is? I thought or hoped it was just a dodgy bit of fuel but I filled up with V-Power yesterday and it is the same. Quote Link to comment Share on other sites More sharing options...
M13KYF Posted June 8, 2012 Share Posted June 8, 2012 sounds like possible MAF sensor on its way out to me. You could take it out and give it a clean with some specialist cleaner you really should be running V-Power anyway, especially for motorways, its what the engine is tuned for and we have seen a couple of engines blow due to excessive use of normal unleaded and motorway driving. Its to do with the knock sensor above a certain rev range Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 8, 2012 Author Share Posted June 8, 2012 Thanks for the reply, I was hoping it would be something simple so if it's just a MAF sensor then I feel a bit better. I only use super unleaded although I'll admit with the rising price of petrol I have recently filled up more with Sainsbury's 97 RON Super Unleaded. It was an embarrassing drive home yesterday as I had to keep the engine revved when coming to a stionary position and it usually either stalls or over revs so hard to keep just above 1000 RPM. Naturally people around me thought I was being an idiot. Quote Link to comment Share on other sites More sharing options...
docwra Posted June 8, 2012 Share Posted June 8, 2012 Im with Mike, sounds like the MAF sensor is on its way out - if the car wont rev over 4K then its almost certainly in "limphome" mode as it cant meter the air its breathing. A new MAF sensor is about £600 from Nissan but after buying one I found out that there is actually a cassette type thing that slides in thats much cheaper, even more so if you You can replace it yourself in about 3 minutes too Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 8, 2012 Author Share Posted June 8, 2012 Cheers I will give ZMANALEX a PM and see if he can supply necessary part, I don't fancy paying Nissan prices Quote Link to comment Share on other sites More sharing options...
Dragonball Posted June 8, 2012 Share Posted June 8, 2012 Just happened yesterday where at the traffic lights I noticed it just stalled from neutral, and to keep the engine running now I have to rev it above 1000RPM. It doesn't sound right and is kind of coughing and it feels very jerky. On the motorways at higher speeds it is not accelerating as it should and feels very slow (don't think it goes to high revs). Also the EM light is now on, any ideas what the issue is? I thought or hoped it was just a dodgy bit of fuel but I filled up with V-Power yesterday and it is the same. Might I suggest it may require the O2 thingy due to the Berks? Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 8, 2012 Author Share Posted June 8, 2012 What do you mean o2 thingy, you mean something else other than a MAF sensor?Berk's have been fine since installed but I guess you mean it could be failing? Also can someone confirm how many MAF sensors are in an 04 model Zed, is it one sensor or two sensors? Quote Link to comment Share on other sites More sharing options...
M13KYF Posted June 8, 2012 Share Posted June 8, 2012 berks high flow racing cats you have installed can cause some errors to pop up. Ususally fixed with spacers on the censors. ZMANALEX sells them. Quote Link to comment Share on other sites More sharing options...
Jeff TT Posted June 8, 2012 Share Posted June 8, 2012 Air flow meter issues can be numerous and often will not show as faulty, although the eml light suggest the ecu knows there is a problem somewhere, just before you buy any parts take a look in fact a real good look around just in case a pipe has come off somewhere resulting in unmetered air upsetting the mixture which can cause the eml to come on too. Jeff TT Quote Link to comment Share on other sites More sharing options...
Jeff TT Posted June 8, 2012 Share Posted June 8, 2012 Woops double post Jeff TT Quote Link to comment Share on other sites More sharing options...
Dragonball Posted June 9, 2012 Share Posted June 9, 2012 berks high flow racing cats you have installed can cause some errors to pop up. Ususally fixed with spacers on the censors. ZMANALEX sells them. O2 thingies :-) PM Alex :-) Quote Link to comment Share on other sites More sharing options...
docwra Posted June 9, 2012 Share Posted June 9, 2012 What do you mean o2 thingy, you mean something else other than a MAF sensor?Berk's have been fine since installed but I guess you mean it could be failing? Also can someone confirm how many MAF sensors are in an 04 model Zed, is it one sensor or two sensors? O2 sensors wont cause dodgy tickover, and theres one MAF sensor, its just after the airbox Quote Link to comment Share on other sites More sharing options...
Dicky Posted June 9, 2012 Share Posted June 9, 2012 sounds like possible MAF sensor on its way out to me. You could take it out and give it a clean with some specialist cleaner Use CRC mass flow cleaning spray. Just bought some off eBay but he seems to have sold out at the moment but here's his contact details Your Move Chris Stonock 130 The Roman Way, West Denton, Tyne And Wear, NE5 5AD Tel: 0191 267 6374 Fax: 0191 229 0115 Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 12, 2012 Author Share Posted June 12, 2012 berks high flow racing cats you have installed can cause some errors to pop up. Ususally fixed with spacers on the censors. ZMANALEX sells them. Okay but the Berk HFCs have been okay when installed about a year and a half ago. Was fitted by Abbey Motorsport and never had the EML come on before, so do I really need to buy spacers on the sensors? Of course there could be a problem with the HFCs but if they are working correctly I don't think I'd need to add anything as they have worked fine before Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 12, 2012 Author Share Posted June 12, 2012 Thanks for the help guys I will hold off buying any parts until I confirm the issue. With regard to the cleaning spray, will this likely be just a short term fix? I will give this a go as it is a cheap fix. Have checked under the bonnett and everything seems to be okay and nothing loose. So I guess if it's the sensor it would either needs a clean or replacing. Cheers. Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 18, 2012 Author Share Posted June 18, 2012 Well I got a diagnostic done cause I wanted to be sure of the issue and it turned out that my engine is running lean, and as a result a drive throttle part had got extremely dirty. So apparently it wasn't the MAF sensor but I got him to give this a clean also. Error has been gone for a few days now and car runs well and no juddering at standstill. I got my car tuned last year, is there any info on these Abbey Motorsport dyno sheets to tell me if I was lean? Quote Link to comment Share on other sites More sharing options...
docwra Posted June 19, 2012 Share Posted June 19, 2012 Im no expert on N/A engines but thats not lean as such, although certainly the highest line on the AFR is higher than Id personally like. Abbey wouldnt have let you leave if it wasnt doing what it should though, Id guess something has happened since then, possibly an inlet leak. Out of interest, how did the place you took it know it was running lean, and how did they find a "dirty" part from that, do they have rollers too? If so, have you got the printout? Quote Link to comment Share on other sites More sharing options...
Exotic Posted June 20, 2012 Author Share Posted June 20, 2012 Thanks Docwra - that's along the line of what I'm thinking, in that between the remap and now something has happened. A couple of months ago I got an engine flush when I got my oil change and was thinking a bit paranoidly that the flush might be connected as some people don't think it's good to have. Other than that nothing else has been different apart from using Sainsbury's 97 RON. The garage knew it was lean as they connected it to a diagnostic computer, unfortunately I didn't get the error code but it doesn't matter as the CEL came back this morning So I will be taking it back there on Saturday morning, they said they wouldn't charge any extra to look at it again, but I will confirm the error code which Mark said to confirm. Quote Link to comment Share on other sites More sharing options...
Wasso Posted June 20, 2012 Share Posted June 20, 2012 Doesn't engine flush cause more issues than resolve them? By dragging up all the sh1t from the engine then passing it through sensitive electronics as such? Quote Link to comment Share on other sites More sharing options...
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