Lewis Maudlin Posted October 25, 2006 Share Posted October 25, 2006 OK, since I changed to the Z32, 740's and GT2871R, I have been having an issue. The car runs rich. I have checked everything except the MAF and the computer. The computer has an enthalpy ROM tune. Enthalpy has been good to deal with and has sent other chips. Even with an AFC maxed out, I can only get to 11:1 AFR. Anyone have a suggestion? Quote Link to comment Share on other sites More sharing options...
SR240Z Posted October 25, 2006 Share Posted October 25, 2006 11:1 afr under boost or just cruising? Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted October 26, 2006 Author Share Posted October 26, 2006 11:1 is the leanest I can get it. It might lean further under enough boost. That was at idle Quote Link to comment Share on other sites More sharing options...
Tombarace14 Posted October 27, 2006 Share Posted October 27, 2006 I worked on an eclipse once that had a major boost leak after the turbo, causing a major rich condtion. Other than that Id check fuel pressure and proper MAF operation to start. Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted October 27, 2006 Author Share Posted October 27, 2006 Checked, checked and checked. Still no problems other than 10:1 or richer at idle. Maybe the harness is the issue? I think it is the only thing other than the block I have not replaced. Quote Link to comment Share on other sites More sharing options...
SR240Z Posted October 27, 2006 Share Posted October 27, 2006 check the maf, if its not regulating anything it might be causing your richness issue Quote Link to comment Share on other sites More sharing options...
sweetleaf Posted October 27, 2006 Share Posted October 27, 2006 What size injectors are you running? . The computer can only run the injectors at a certain minimum pulse width, after that they don't work correctly. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 27, 2006 Share Posted October 27, 2006 Changed the title. I thought you had problems crapping. That clearly isn't what this thread is about. Quote Link to comment Share on other sites More sharing options...
Cal Poly Zmanaustin Posted October 28, 2006 Share Posted October 28, 2006 You may want to check your charging system; if you are running too low a voltage the ecu may default to rich. I had this problem with a Z31 ecu. Not sure if the Z32 would have the same reaction. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted October 28, 2006 Share Posted October 28, 2006 does the maf output at the maf match the output at the ecu? Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted October 28, 2006 Author Share Posted October 28, 2006 Changed the title. I thought you had problems crapping. That clearly isn't what this thread is about. Nice move, only I don't have a Z32 ECU. That is what the MAF is from. Apparently, you decided to change the title without know what we are talking about? Anyway, I will check to voltage. That could be an issue. Good suggestion on the voltage. The MAF has now been checked on a machine to check MAF's. It is within spec and working properly. Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted November 7, 2006 Author Share Posted November 7, 2006 OK, here's the scoop. Anyone with an SR20DET may benefit from my experience. Apparently, the ECU board is bad or the connection to the daughterboard. This explains why from time to time my car has run great. I used to run a different Mine's tuned ECU. Word is that cars with bad ECU's run without a tuning map and run extremely rich. So if this happens to you, now you know. Quote Link to comment Share on other sites More sharing options...
Z U L8R Posted January 18, 2007 Share Posted January 18, 2007 have you disconnected the battery since your bigger injectors and turbo. your ecu may need to relearn. Quote Link to comment Share on other sites More sharing options...
AK-Z Posted January 21, 2007 Share Posted January 21, 2007 Nice move, only I don't have a Z32 ECU. That is what the MAF is from. Apparently, you decided to change the title without know what we are talking about? Anyway, I will check to voltage. That could be an issue. Good suggestion on the voltage. The MAF has now been checked on a machine to check MAF's. It is within spec and working properly. So what ECU do you have? ECUs tend to run on presets when its not getting a proper read from a sensor. Check the connection to the temp sensor and any other sensor that comes to mind. Quote Link to comment Share on other sites More sharing options...
240zwannabe Posted January 27, 2007 Share Posted January 27, 2007 Lewis, how was the autolab experience? Quote Link to comment Share on other sites More sharing options...
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