p3te Posted August 11, 2012 Share Posted August 11, 2012 I've just changed the manifold and throttle body on my jspec tt and now. Its running like s**t the idle is really low and keeps cutting out unless I rev it and keep the revs up they just drop and it cuts out, I'm also smelling fuel any ideas what to check or what the problem is? Quote Link to comment Share on other sites More sharing options...
safcdixon Posted August 11, 2012 Share Posted August 11, 2012 Maybe the injector o rings if you can smell fuel check for any leaks around them Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 I haven't touched that for down just manifold and tb? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted August 11, 2012 Share Posted August 11, 2012 Do you still have the stock fuel rail. You may have touched the rail or one of the injectors accidentally when installing the new plenum. Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 Injector plugs look fine, vac lines look fine Quote Link to comment Share on other sites More sharing options...
safcdixon Posted August 11, 2012 Share Posted August 11, 2012 What about the gaskets did you reuse the old ones? Did you use gasket sealant Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 I re used the metal gaskets, its got worse now it. Just splutters and cuts out as soon as I start it Quote Link to comment Share on other sites More sharing options...
safcdixon Posted August 11, 2012 Share Posted August 11, 2012 I re used the metal gaskets, its got worse now it. Just splutters and cuts out as soon as I start it Doesnt sound good, did you use any sealant? Did you torque the bolts up? Its sounds like an air leak, do you have a afr gauge? Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 No there was no sealant on so I just fitted as it was, I just bolted them up tight not set torque, no afr gauge no Quote Link to comment Share on other sites More sharing options...
safcdixon Posted August 11, 2012 Share Posted August 11, 2012 No there was no sealant on so I just fitted as it was, I just bolted them up tight not set torque, no afr gauge no I know it might be a pain but its probobly worth taking it apart again using sealant and torquing them up to the spec then atleast you can rule that out, did you move the tps by any chance? Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 Well I had the tps off to put on the other throttle body, I centred the screws up so it was the same as it. Was, Quote Link to comment Share on other sites More sharing options...
p3te Posted August 11, 2012 Author Share Posted August 11, 2012 video here http://www.youtube.com/watch?v=9ko02tnmc0M&feature=youtu.be just a low idle on the vid but sometimes its so low it splutters and cuts out Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 12, 2012 Share Posted August 12, 2012 Plug your MAP sensor back in Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 Ill unplug it and plug it back and see what happenes Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 Fiddled with. The map sensor it seems fine Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 12, 2012 Share Posted August 12, 2012 (edited) Well you'd only get overfuelling like that if the MAP sensor was reporting more air than the engine was actually seeing, and the only real way that can happen is if it's reporting atmospheric pressure due to a bad vacuum supply (missing/split hose) or an electrical fault. I noticed your ! light came on in the video, have you checked for fault codes? Edit - just rewatched it, the ! light is on all the time, I assume that's your handbrake then It does seem to brighten when you rev it, but that's probably due to the low idle causing poor electrical supply off the alternator. I still think it's a vacuum supply to the MAP sensor. Hose blocked or split/holed. You've been working all around those hoses to swap the TB and mani so it makes sense... Edited August 12, 2012 by Ian C (see edit history) Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted August 12, 2012 Share Posted August 12, 2012 i sort of had that problem last month, turned out to be unplugged hose to the Maf sensor, pulled out my accident, check all the hoses budd! if have not already. Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 I hear you, it might not be overfueling it must have just been me hanging over it lol, its just the really low idle really I hoped it was a vacume hose but they seem fine, I'm in the process of stripping down and starting again right now, going to apply gasket sealant on the gaskets to the tb and inlets see if that helps as well, as well as swap the sensors on the tb for the ones that was on my original tb Quote Link to comment Share on other sites More sharing options...
hodge Posted August 12, 2012 Share Posted August 12, 2012 As above Pete, Ian knows his stuff. As I explained last night though bud, you need to change/clean the plugs and O2 sensor once you find the issue because if the fouled it will continue to overfuel. Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 This is the maf yes? While it was off I renewed all the hoses so the hoses were fine it might now be overfuelling just what I thought at firsr Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 12, 2012 Share Posted August 12, 2012 Yep that's the MAP sensor (MAF is a different thing, just to avoid confusion). It's plumbed in correctly in that photo. I had a think about any other reason it could have a low idle, based on what you've been changing. Try this - slacken the two bolts holding the throttle position sensor in place on the throttle body, and move it to maximum adjustment clockwise Tighten up and retest. Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 Is that the one at the front left by the spark plug cover? Today I've had it all out and refitted everything from the start, all sensor plugs and vac lines fine, spark plugs cleaned and o2 sensor cleaned and its still the same Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 Or thje one closest to. The ps tank? I've put the one near the ps tank full clockwise and its still the same really Quote Link to comment Share on other sites More sharing options...
hodge Posted August 12, 2012 Share Posted August 12, 2012 Have you checked the MAP sensor vac line to the EManage Pete. If that's off then you'll get the same issue. Quote Link to comment Share on other sites More sharing options...
p3te Posted August 12, 2012 Author Share Posted August 12, 2012 put both on full clockwisr, seems like its not on the verge of cutting out now and fluctuating a bit but still low http://www.youtube.com/watch?v=FwuFD5-eJ4o Quote Link to comment Share on other sites More sharing options...
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