Paul R Posted February 10, 2004 Share Posted February 10, 2004 Hi, I'm still having problems with my car. I seem to get a lot of lag when the first turbo spins up. I kind of get 3 or 4 psi boost, hesitation for about a second, then full boost. Anyone know what this might be? Dude put some iridium plugs out of another car into my car before I picked it up. Can swapping plugs from different cars have adverse affects? I'm gonna check the plugs tonight. Do Halfords do decent plugs? If so what make/model etc. Cheers, Paul. Quote Link to comment Share on other sites More sharing options...
Supera Posted February 10, 2004 Share Posted February 10, 2004 It's your plugs Try regapping them down or get a new set to get rid of the hesitation. Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 10, 2004 Author Share Posted February 10, 2004 Originally posted by Supera It's your plugs Try regapping them down or get a new set to get rid of the hesitation. Thanks, what should the gap be?? Paul. Quote Link to comment Share on other sites More sharing options...
Supera Posted February 10, 2004 Share Posted February 10, 2004 .030 ~ .032 depends on how much boost your running Quote Link to comment Share on other sites More sharing options...
LeeT Posted February 10, 2004 Share Posted February 10, 2004 Originally posted by Paul R Thanks, what should the gap be?? Paul. iridiums come pre gapped. you shouldnt need to change them and dude knows what hes doing Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 10, 2004 Author Share Posted February 10, 2004 Originally posted by Supera .030 ~ .032 depends on how much boost your running I'm running standard boost 0.9 bar. So what shuld the gap be? What is .030 in metric? Paul Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 10, 2004 Author Share Posted February 10, 2004 Originally posted by leett iridiums come pre gapped. you shouldnt need to change them and dude knows what hes doing OK, what should the gap be in metric? so I can check? Paul. Quote Link to comment Share on other sites More sharing options...
LeeT Posted February 10, 2004 Share Posted February 10, 2004 Originally posted by Paul R OK, what should the gap be in metric? so I can check? Paul. about 0.8mm i think Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 10, 2004 Author Share Posted February 10, 2004 Bugger. Cant do it! it's too dark and the extension for my spanner has gone missing!! When I start her up, it's turning over a lot before it fires. Could this be plugs too? Paul. Quote Link to comment Share on other sites More sharing options...
dude Posted February 10, 2004 Share Posted February 10, 2004 Same as loids post , ring me tommorrow and i'll tell you what NGK's to put in , those iridiums were coolder than stock so it could be that !!!! Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 10, 2004 Author Share Posted February 10, 2004 Originally posted by dude Same as loids post , ring me tommorrow and i'll tell you what NGK's to put in , those iridiums were coolder than stock so it could be that !!!! Dude:flame Dev OK, cheers dude. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted February 11, 2004 Share Posted February 11, 2004 I could see how plugs could cause a misfire, but I'm not sure they're going to hold your boost down for a second or so... They'd be far more likely to stop you reaching full boost by causing a misfire, but you'd know about that, and not at stock boost levels, (unless the plugs are totally shot!). I think there's another problem somewhere, but I hope not, for your sake! Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 11, 2004 Author Share Posted February 11, 2004 Originally posted by Matt Harwood I could see how plugs could cause a misfire, but I'm not sure they're going to hold your boost down for a second or so... They'd be far more likely to stop you reaching full boost by causing a misfire, but you'd know about that, and not at stock boost levels, (unless the plugs are totally shot!). I think there's another problem somewhere, but I hope not, for your sake! Oh bugger, your making me worried now Quote Link to comment Share on other sites More sharing options...
dude Posted February 11, 2004 Share Posted February 11, 2004 Check the vacuum hoses , when is the delay is it 1st to 2nd?? dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 11, 2004 Author Share Posted February 11, 2004 Originally posted by dude Check the vacuum hoses , when is the delay is it 1st to 2nd?? dude:flame Dev Nope, it's when the first turbo starts to boost, I can feel some power, then hesitation for a second, then 0.6 bar. Second turbo kicks in normally and quickly. Paul. Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 11, 2004 Author Share Posted February 11, 2004 Right, A bit more info. I just took the car out again. The delay is from when the boost guage gets to 0bar, to when the boost starts to rise. Another symptom is that when accelerating, the car judders a bit. Also when I let my foot off the accelerator and decelerate there is some juddering again. The idle is also lumpy when idling I've had a look at some HKS plugs. It appears that the gaps are going to be 1.1mm iridium or 0.8mm platinum, s40G I think?? Obvioulsy I dont want to buy these if it's not the plugs! Cheers, paul. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted February 11, 2004 Share Posted February 11, 2004 Sorry to sound all doom and gloom, but just get yourself some cheapish NGK BKR7E's. They're well proven plugs and not too expensive to find out it's not the plugs... A gap of 1.1 should be fine on stock boost, 0.8 is generally for higher boost levels. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 11, 2004 Share Posted February 11, 2004 Originally posted by Paul R Nope, it's when the first turbo starts to boost, I can feel some power, then hesitation for a second, then 0.6 bar. Second turbo kicks in normally and quickly. Paul. Sounds like it's gonna be a vac hose to do with the sequential system probably one that's involved in the prespool of #2 turbo as it only comes in once #1 has got going a bit. -Ian Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 11, 2004 Author Share Posted February 11, 2004 Originally posted by Ian C Sounds like it's gonna be a vac hose to do with the sequential system probably one that's involved in the prespool of #2 turbo as it only comes in once #1 has got going a bit. -Ian Has anyone got a pic of this hose or hoses? I dont know anything about the sequential system, so need help! Can you tell me what to check? Cheers, Paul. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 11, 2004 Share Posted February 11, 2004 http://www.mkivsupra.net/resources/turbopipes/left.html It takes a lot of holding your head and going "hnnnng" to understand the vacuum map and everything, I'll warn you now it also helps to be looking in the engine bay as you do it. From very recent experience, check *every* hose -Ian Quote Link to comment Share on other sites More sharing options...
Dragonball Posted February 11, 2004 Share Posted February 11, 2004 Originally posted by Paul R Oh bugger, your making me worried now Just chill - it's something very simple and nothing to worry about Good grief guys stop winding him up! Check ALL the hoses - it wont take long! Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 12, 2004 Author Share Posted February 12, 2004 Originally posted by Matt Harwood Sorry to sound all doom and gloom, but just get yourself some cheapish NGK BKR7E's. They're well proven plugs and not too expensive to find out it's not the plugs... A gap of 1.1 should be fine on stock boost, 0.8 is generally for higher boost levels. Will it be OK to run the car on these plugs for a month or two until I can get a decent set and a service? They are only 11 pounds a set. Is that right? sounds cheap to me! Paul. Quote Link to comment Share on other sites More sharing options...
dandan Posted February 12, 2004 Share Posted February 12, 2004 I paid £1.76 each for these plugs from Partco. As far as I can remember they're ok for upto about 6,000 miles but am not sure for definite. Dan Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted February 12, 2004 Share Posted February 12, 2004 I've done 10,000 miles on a set before, and I only changed them because I wanted to, not because they were breaking down... Quote Link to comment Share on other sites More sharing options...
Paul R Posted February 12, 2004 Author Share Posted February 12, 2004 Originally posted by Matt Harwood I've done 10,000 miles on a set before, and I only changed them because I wanted to, not because they were breaking down... Cool. Was that on stock boost or higher? Paul. Quote Link to comment Share on other sites More sharing options...
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