ripped_fear Posted September 28, 2016 Share Posted September 28, 2016 I havent messed with it to be honest Youve had all the plenum and TB off havent you to do your cam covers? definitely start there imo if you have ruled out vac leaks Quote Link to comment Share on other sites More sharing options...
Richie_k83 Posted September 28, 2016 Author Share Posted September 28, 2016 Youve had all the plenum and TB off havent you to do your cam covers? definitely start there imo if you have ruled out vac leaks Yea, sorry, i mean i havent removed it, just unplugged it. Connection seems ok though. Would it cause it to run so rich though? plugs and exhaust stunk like fuel Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 28, 2016 Share Posted September 28, 2016 Yea, sorry, i mean i havent removed it, just unplugged it. Connection seems ok though. Would it cause it to run so rich though? plugs and exhaust stunk like fuel Not sure but I know having them incorrectly setup can make supras do all sorts of weird stuff. For the sake of ten mins of work start there. Quote Link to comment Share on other sites More sharing options...
Richie_k83 Posted September 28, 2016 Author Share Posted September 28, 2016 Not sure but I know having them incorrectly setup can make supras do all sorts of weird stuff. For the sake of ten mins of work start there. /QUOTE] True, Will cover my tracks with things i have messed with first, the will have a look at how to set that too Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted September 28, 2016 Share Posted September 28, 2016 I did, engine stalled straight away. I used an old number plate to blank off the throttle inlet. It held the plate there for a few seconds after the engine stalled too. No point getting new gaskets then. At least your problem isn't a leak after the TB. If I were you I'd borrow a working manual ECU from a member and rule that out as a starting point. If issue persists with other ECU then start diagnosing the ignition system, coolant ecu temp sensor etc. Did you get a vacuum gauge hooked up yet? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 28, 2016 Share Posted September 28, 2016 N/A's seem FAR more prone to head gasket failure than TT's. They don't blow out as such, rather that one of the inner laminations cracks. The head and block and both gasket surfaces can look perfect, but if you split the gasket up into its constituent shims you find one is cracked. I have seen this several times. Why N/A's do this i don't know. Quote Link to comment Share on other sites More sharing options...
Richie_k83 Posted September 28, 2016 Author Share Posted September 28, 2016 No point getting new gaskets then. At least your problem isn't a leak after the TB. If I were you I'd borrow a working manual ECU from a member and rule that out as a starting point. If issue persists with other ECU then start diagnosing the ignition system, coolant ecu temp sensor etc. Did you get a vacuum gauge hooked up yet? I'm thinking this to be honest, will get hold of one and keep my fingers crossed lol. Vacuum Gauge i have ordered from eBay, so can add that to my tool collection lol N/A's seem FAR more prone to head gasket failure than TT's. They don't blow out as such, rather that one of the inner laminations cracks. The head and block and both gasket surfaces can look perfect, but if you split the gasket up into its constituent shims you find one is cracked. I have seen this several times. Why N/A's do this i don't know. Ahh righty, good to know. Its pushing the miles out a bit now (136,000 mile), so may be overdue... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 28, 2016 Share Posted September 28, 2016 BTW, many vacuum gauges come with a damper in the port to dampen needle movement. it's usually an insert with a VERY small bore hole in it. You DO NOT want a dampened movement when looking for bad valves or vacuum leaks, you need to look for needle pulsation, so remove it. Good luck. Quote Link to comment Share on other sites More sharing options...
Richie_k83 Posted September 28, 2016 Author Share Posted September 28, 2016 BTW, many vacuum gauges come with a damper in the port to dampen needle movement. it's usually an insert with a VERY small bore hole in it. You DO NOT want a dampened movement when looking for bad valves or vacuum leaks, you need to look for needle pulsation, so remove it. Good luck. No worries, cheers Chris, will take a look when it arrives Quote Link to comment Share on other sites More sharing options...
Richie_k83 Posted October 5, 2016 Author Share Posted October 5, 2016 All sorted now, thanks for the input guys. Turned out to be a Vacuum line in the wrong position, no idea how i overlooked it.... lol Quote Link to comment Share on other sites More sharing options...
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