dr_jekyll Posted October 17, 2010 Share Posted October 17, 2010 hello i have just been for a thrash in my car to test some changes and i nticed my afr was miss beahving the guage reads down to 11.1 on full boost initially then jumps to 22.4. now am i right in thinking if my actual afr was 22.4 on wot the car would knock like mad and probabbly blow the motor after a full 2nd through 4 th pull? . it was actually going pretty well and the engine was smooth all the way to the redline evan though it was staying at 22.4. the afr guage in question is an innovate lc1 wideband Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted October 17, 2010 Share Posted October 17, 2010 try recalibrating the sensor. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 17, 2010 Author Share Posted October 17, 2010 try recalibrating the sensor. its all a bit hot at the moment so thaught i would ask while it cools Quote Link to comment Share on other sites More sharing options...
Andy Blyth Posted October 17, 2010 Share Posted October 17, 2010 It's possible that the sensor is broken. The behaviour that you're getting sounds suspiciously similar to the following: 1mb4VmDd0ao Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 17, 2010 Author Share Posted October 17, 2010 (edited) yea i think its a shafted senor, i hope so anyway. i just wanted to confirm that if my car was actually leaning out to that extent it would have melted itself and it would not have run nicely Edited October 17, 2010 by dr_jekyll (see edit history) Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 17, 2010 Author Share Posted October 17, 2010 just re cald the sensor and its still the same . the it seems to be working fine when driving gently but as soon as i open the taps its going full lean (22.4) bloody thing. it really wouldnt be the fueling goin that lean would it ? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 17, 2010 Share Posted October 17, 2010 How did you re calibrate the sensor? I have on occasion seen my old LM-1 X XD-16 gauge combo behave like this, only to revert to normal again, its very worrying, However sometimes the sensors can become over sensitive to high temps and go a bit haywire, although i used to see some very odd readings of 50 something. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 17, 2010 Author Share Posted October 17, 2010 i removed it from the dp , cleand it , and pressed the calibration button it flashed the light at me for 10 seconds then went solid, i then put it back into the dp. on the lc-1 22.4 is the leanest it will go so thats basicly reading no fuel if im understanding the manual im just hanging onto the hope that if it was going that lean it would not run verry well or would have died after a hard drive. right? Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 18, 2010 Author Share Posted October 18, 2010 confirmed. its the sensor tha goosed. i did the brake cleaner test and it does exactly what the bad sensor in the vid does, so thanks for that andy Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 18, 2010 Share Posted October 18, 2010 Get from here Craig. £60 and they take paypal. Just ordered a new one myself, mine is playing up. http://www.efi-parts.co.uk/index.php?productID=169 Quote Link to comment Share on other sites More sharing options...
Andy Blyth Posted October 18, 2010 Share Posted October 18, 2010 confirmed. its the sensor tha goosed. i did the brake cleaner test and it does exactly what the bad sensor in the vid does, so thanks for that andy It's good news in a way I guess - the other outcome would have been pretty expensive! Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 18, 2010 Author Share Posted October 18, 2010 Get from here Craig. £60 and they take paypal. Just ordered a new one myself, mine is playing up. http://www.efi-parts.co.uk/index.php?productID=169 will do, cheers Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 19, 2010 Share Posted October 19, 2010 If it uses a Bosch LSU4 sensor I have some genuine new ones cheaper than that. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 19, 2010 Share Posted October 19, 2010 If it uses a Bosch LSU4 sensor I have some genuine new ones cheaper than that. LSU 4.2? do they come with the 7057 5 pin type connector Chris? the ones in the link are bosch btw. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 19, 2010 Share Posted October 19, 2010 No, I have a load of new LSU 4.0 sensors, maybe backwards compatible, for example my Motec lambda meter can be set to read all NTK and Bosch sensors correctly, don't know about these displays though. They have this type of Bosch connector Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 19, 2010 Share Posted October 19, 2010 (edited) That type of connector won't fit the Innovate system stuff Chris. crap pic but they are this type. Edited October 19, 2010 by Tricky-Ricky (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 19, 2010 Share Posted October 19, 2010 Shame, the LSU 4 was a very reliable sensor. You could just swap the plug if the unit has a calibration file for them I suppose? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 19, 2010 Share Posted October 19, 2010 Shame, the LSU 4 was a very reliable sensor. You could just swap the plug if the unit has a calibration file for them I suppose? Actually i don't see why not, should be the same sensor but the plug contains a matching resistor i think, from what i remember, don't lambdas use silver wire so they either have to have the right solder or be crimp connected only? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 19, 2010 Share Posted October 19, 2010 I think the resistor is in the sensor body, not the connector. I always crimp them using Raychem glue sealed crimps, which are the best thing I have bought for wiring in years. Quote Link to comment Share on other sites More sharing options...
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