bulldog 2 Posted May 3, 2008 Report Share Posted May 3, 2008 No car would ever intentionally be made to misfire (with the exception of rev limiting)' date=' it would destroy the catalytic convertor! The clio 182 ECU is a little bit smarter than the VR6 one, but i'm pretty sure it doesn't have a cold rev limiter, the only car I can think od that does off the cuff is the new BMW M3 which sets rev limiting in stages from cold to hot.[/quote']I was drinking with a BMW technican last night and he says all top line BMWs have for a few years now have had the rev limiter fitted that stops you over reving before the engine is up to temperature, but hes never heard of any vehcile cutting out or running on less than all the cylinders. Link to post Share on other sites
james4287 1 Posted May 5, 2008 Author Report Share Posted May 5, 2008 what oil is your vr6 running on?i'm now using 5w/40 with no probs, that said i haven't started it and revved the nuts off it as thats just silly, but now when i get out my car space onto the main road i can put my foot down without it stalling over 3.5krpm.However, plugged mine back into vagcom today and have;00553 - mass air flow senser00525 - 02 senser.now since i cleared the codes the other day, it had to the best of my knowledge been running faultlessly. did 200 miles yesterday and didn't miss a beat.sooo see how cheap i can get a mass air flow senser now.... Link to post Share on other sites
Ciaran 4 Posted May 5, 2008 Report Share Posted May 5, 2008 Mine does exactly the same. If i happen to thrash it when cold it cuts out and refuses to start and just spins like their is no compression.I have learnt to just wait till it is warm i have done 40k now and learnt just let it warm up and it is fine Link to post Share on other sites
leespeza 0 Posted May 7, 2008 Report Share Posted May 7, 2008 hi all wheres the o2 senser Link to post Share on other sites
james4287 1 Posted May 12, 2008 Author Report Share Posted May 12, 2008 if you look over the back of the egine, down on the chassis under the brake fluid theres 2 multi-plugs, the white one is knock sensor and the black one is the 02 sensor, follow the wire down and it leads to a sensor on the exhaust.just to update further, 00525 was still present this weekend, but have now fitted a new mass air flow so we shall see what happens next, idle speed is ever so slightly smoother and more consistant now though. Link to post Share on other sites
GVK 1 Posted June 3, 2008 Report Share Posted June 3, 2008 Mine had that 525 02 sensor code, I replaced the 02 sensor, still the same - decided to strip the loom apart and found some bad soldered joints onto the multi plug on the engine loom. After I do a track day, the car always runs rough on the way home, oil getting on the MAF - I just clean it with Isowhatsitcalled alcohol and it's sorted. Link to post Share on other sites
james4287 1 Posted June 30, 2008 Author Report Share Posted June 30, 2008 mass air flow senser and 02 codes are still present.00553 & 00552i've checked the wiring beteen both sensers and ecu - resistance within spec, and checked for battery voltage when cranking on both sensers, again ok.think i'm going to sit on the fence and wait for the fault to be present at all times which will hopfully make it easier to trace. Link to post Share on other sites
contorted fungus 0 Posted July 3, 2008 Report Share Posted July 3, 2008 i have the same prob with mine have had it ran on a diagnostic programme its caused by faulty earths to the lambda sensor, air mass meter, idle stabilisation valve and another piece which i cant remember all i need to do is find out which earthing point is broken/dirty Link to post Share on other sites
james4287 1 Posted August 12, 2008 Author Report Share Posted August 12, 2008 did you get any further? Link to post Share on other sites
contorted fungus 0 Posted August 30, 2008 Report Share Posted August 30, 2008 ended up removing the battery tray and cleaning all six of the earth leads under it also fitted a new non return valve which stopped oil getting onto the air mass meter runs smoother than a bmw now there is a guy on ebay who sells new ones for £34 called fircof1. also i can get 36 mpg on 95ron petrol too so its worth trying these fixes Link to post Share on other sites
contorted fungus 0 Posted October 3, 2008 Report Share Posted October 3, 2008 has it solved the problem? Link to post Share on other sites
james4287 1 Posted November 30, 2008 Author Report Share Posted November 30, 2008 no, still getting mass air flow senser code intermittantly. i.e. aftef a few hundred miles it will come back.i'm thinking dry joint in the ecu, so am going to keep a closer eye on it over winter as in theory with expected colder temps will make the joints contract which maybe the cause of the fault code? Link to post Share on other sites
scottydog137 0 Posted June 10, 2010 Report Share Posted June 10, 2010 Ive had this problem on a few galaxy's and golfsThe coil pack has caused a missfire which has chucked unburnt fuel into to exhaust and in turn ruined the lambda sensor which has then caused the ECU to overfuel the enginge and annhilated the Cat!!!the best way to test for this (and cheapest it will be noisy) is remove the exhaust and disconnect the lambda sensor and see how it drives when cold ive changed loads on the galaxy and golf where the cat has broke up and caused problems!! Link to post Share on other sites
scottydog137 0 Posted June 10, 2010 Report Share Posted June 10, 2010 Soz just noticed the ost date-Ineed shooting!!!! Link to post Share on other sites
Recommended Posts