Carl_S Posted May 4, 2008 Share Posted May 4, 2008 Was not a problem until recently. No changes to the car since purchase apart from cosmetic ones, and new oil and filter. The problem is a kind of blowing/spitting sound from the exhaust, as I say only happens on 1.3 bar, not the 1.1 bar setting. Bought the car in nov'07. Wondering if its the coil packs or dirty spark plugs, not sure what else it could be. I have turbosmart eboost2, and hybrid turbos, and supporting engine mods and fuel pump mods, but stock j-spec injectors. If it has been fine on 1.3 bar for many months why this now? Any ideas regarding the problem appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
heckler Posted May 4, 2008 Share Posted May 4, 2008 i'd say plugs Quote Link to comment Share on other sites More sharing options...
Carl_S Posted May 4, 2008 Author Share Posted May 4, 2008 i'd say plugs I hope you are right. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted May 4, 2008 Share Posted May 4, 2008 Running more boost than your cooling can support? Sounds like det and backfiring, the weather has just started warming up so it may be a problem thats been around for 6 or more months its just been cold enough so far to show itself. Quote Link to comment Share on other sites More sharing options...
Carl_S Posted May 5, 2008 Author Share Posted May 5, 2008 Its a possibility. Thanks mate. But I do have the greddy four row intercooler forgot to mention, and a fluidyne rad so I would have thought the cooling was ok. The temp gauge never goes past midway. I thought it may have been det too, would be nice if someone in the area could give opinion on it after hearing it. Quote Link to comment Share on other sites More sharing options...
Pig Posted May 5, 2008 Share Posted May 5, 2008 J spec or UK spec? - either or there is no point running more than 1.2 bar as you will generate far more heat than extra power. (get yourself an EGT gauge and it will help show you that yur about to fry your engine) Change plugs and lower boost. All will be fine then hopefully Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted May 5, 2008 Share Posted May 5, 2008 Its a possibility. Thanks mate. But I do have the greddy four row intercooler forgot to mention, and a fluidyne rad so I would have thought the cooling was ok. The temp gauge never goes past midway. I thought it may have been det too, would be nice if someone in the area could give opinion on it after hearing it. is the IC fully ducted?? also at 1.3bar the timing is prob getting drastically pulled which will rocket EGT's sp keep an eye on them how is your fuel pump and injectors and do you have a wideband in there?? I would suggest getting one very soon and not driving it to hard until you know whats happening Quote Link to comment Share on other sites More sharing options...
Carl_S Posted May 5, 2008 Author Share Posted May 5, 2008 J spec or UK spec? - either or there is no point running more than 1.2 bar as you will generate far more heat than extra power. (get yourself an EGT gauge and it will help show you that yur about to fry your engine) Change plugs and lower boost. All will be fine then hopefully J spec car. I understand if its the plugs, but the it coped with 1.3 before. But anyway. I hear what you are saying, EGT. is the IC fully ducted?? also at 1.3bar the timing is prob getting drastically pulled which will rocket EGT's sp keep an eye on them how is your fuel pump and injectors and do you have a wideband in there?? I would suggest getting one very soon and not driving it to hard until you know whats happening I have twin walbros and standard J-spec injectors. I'm not going to drive it hard like you say. It was already stressed by many people here to get an AFM wideband and AGT. Just did not see a massive need since there were no funny noises as above at 1.3 like there are now. The car runs fine at 1.1. Since the car was running fine and there have been no engine or fuel mods since purchase, I'm hoping its plugs too. Will have to get it looked at by a specialist unless, it's an easy job checking the plugs. The IC fully ducted? I don't know. I have some pics of the engine bay if that would help. Quote Link to comment Share on other sites More sharing options...
Pig Posted May 5, 2008 Share Posted May 5, 2008 Easy as pie to change the plugs. Bring it over later and ill give you a hand if you want. (stansted airport) Quote Link to comment Share on other sites More sharing options...
Carl_S Posted May 5, 2008 Author Share Posted May 5, 2008 Thanks Pig I'll be in touch. Quote Link to comment Share on other sites More sharing options...
bignum Posted May 5, 2008 Share Posted May 5, 2008 @ 1.3 bar on hybrids your 440 injectors will be seriouslly struggling, do you have an adjustable fpr, best way would be to drop some uk 550`s in, Quote Link to comment Share on other sites More sharing options...
Carl_S Posted May 5, 2008 Author Share Posted May 5, 2008 I'll have to find some and have them dropped in. do i need to get anything else to get them working, or are they a straight replacement for the j-spec injectors? Quote Link to comment Share on other sites More sharing options...
heckler Posted May 5, 2008 Share Posted May 5, 2008 I'll have to find some and have them dropped in. do i need to get anything else to get them working, or are they a straight replacement for the j-spec injectors? if you get uk 550's you will need a resistor pack. Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Share Posted May 5, 2008 You need a resistor pack too as they are different impedance. See http://www.internetwork.org.uk/Injectors/Injectors.htm for a guide! Quote Link to comment Share on other sites More sharing options...
heckler Posted May 5, 2008 Share Posted May 5, 2008 You need a resistor pack too as they are different impedance. See http://www.internetwork.org.uk/Injectors/Injectors.htm for a guide! I recognise that site.... Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Share Posted May 5, 2008 I recognise that site.... Yeah I think some cowboy wrote it but it certainly came in handy when I did mine Quote Link to comment Share on other sites More sharing options...
heckler Posted May 5, 2008 Share Posted May 5, 2008 Yeah I think some cowboy wrote it but it certainly came in handy when I did mine lol - i only host it, i didnt write it Quote Link to comment Share on other sites More sharing options...
Carl_S Posted February 26, 2009 Author Share Posted February 26, 2009 I am reviving this thread as the problem seems to have sorted itself out. No plugs have been changed or anything tinkered with since I last posted about this. All I did was to drive it very hard, and fast. At 1.1 it now pulls very hard, almost like it used to pull before on 1.3. And 1.3 now feels and sounds like it did when I first bought the car, faster, and a lot more nimble. Really just for the record. I don't understand what happened, there is a very tiny hesitation on near WOT sometimes, but nothing like before. Quote Link to comment Share on other sites More sharing options...
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