ballsdeep Posted March 21, 2016 Share Posted March 21, 2016 At the rear of the intake manifold below the runners is a sensor in the block. What is it for? I just came across a blue plug that was disconnected and it seems to fit! Only discovered it because my afr's are showing it running rich and I can smell fuel apart from that the cars been running great! Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted March 21, 2016 Share Posted March 21, 2016 Stock knock sensor? Post a pic. Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 21, 2016 Author Share Posted March 21, 2016 Best I can do right now, Lately Iv been checking for error codes but nothing was stored? God knows how long it's been unplugged?? What symptoms would it being unplugged cause? Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 21, 2016 Share Posted March 21, 2016 Is towards the front or the rear of the block. If it's towards the rear, then it will be a knock sensor. Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 21, 2016 Author Share Posted March 21, 2016 Yes the rear and above the starter motor, I'm concerned why it was unplugged and what running affects this would have had? Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 21, 2016 Author Share Posted March 21, 2016 Googles my friend! May have found why I'm running rich and where my fuel economy went! Strange how it didn't store any codes though? Il reset the ecu and see how i get on. Cheers guys Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 21, 2016 Share Posted March 21, 2016 Can't say I've ever tested it but I think one of a few things might happen: 1) Won't make a difference if unplugged or not (especially if you aren't getting engine codes), potentially having just one of two plugged in is ok? 2) It will pull timing and ecu will chuck more fuel to avoid det (even though it isn't happening) 3) You will have a loss of power & irratic idle as ecu goes to a limp mode (but i'd expect a code to be stored) Maybe another member with more experience can confirm if any of the above is more likely then another. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 21, 2016 Share Posted March 21, 2016 Sensor, or VSV? Sounds like its the VSV that deals with the charcoal canister Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 21, 2016 Author Share Posted March 21, 2016 Vsv?? Possibly dumb question but what's that, is it the vacuum tank? If so that's been removed and so has the charcoal canister, It's NA-t with a TT intake manifold so Iv removed all that. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 21, 2016 Share Posted March 21, 2016 (edited) Won't be VSV as it doesn't screw into the block. Edit, funnily enough I didn't realise there was a vsv for the charcoal canister. Edited March 21, 2016 by Big Supes (see edit history) Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 21, 2016 Share Posted March 21, 2016 After having a look, I'd go with knock sensor, but I wouldn't have thought it would cause the engine to run rich. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 22, 2016 Share Posted March 22, 2016 Vsv?? Possibly dumb question but what's that, is it the vacuum tank? If so that's been removed and so has the charcoal canister, It's NA-t with a TT intake manifold so Iv removed all that. VSV, Vacuum Switching Valve, a blue plug is used for the valve that purges the charcoal canister Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 22, 2016 Author Share Posted March 22, 2016 really wish I'd just left the car alone now!! All I did was adjust the spark plug gap a little too 0.28 and reset the ecu and now I'm running rich, swapped out the o2 sensor for another and it's still the same! That's when I found this blue plug just dangling so it's now been plugged back in but after a drive to work idle afr was still mid 11's Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 22, 2016 Share Posted March 22, 2016 What ECU are you using to control fueling/timing etc. Surely looking at that will give you some clues as to why you are running rich, rather than tinkering with hardware hoping it will make a change? Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 22, 2016 Author Share Posted March 22, 2016 E-manage ultimate but Iv no way of checking it myself, the car was running spot on before the ecu reset and I only adjusted the gap to see if it would cure a very minor idle hesitation. Quote Link to comment Share on other sites More sharing options...
ballsdeep Posted March 29, 2016 Author Share Posted March 29, 2016 Sensor, or VSV? Sounds like its the VSV that deals with the charcoal canister After closer inspection you was right. It's not actually in the block but attached to the lower runners and I seem to recall being told I don't need it plugged in since I don't have any of the vac tank left! Thanks for your help guys Quote Link to comment Share on other sites More sharing options...
Annabella Posted March 30, 2016 Share Posted March 30, 2016 Did you find out it was Jenny from the block? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.