dr_jekyll Posted October 11, 2008 Share Posted October 11, 2008 (edited) I was wondering if anybody had ever used a voltage clamp on the map sensor to stop it from bringing up an error code , i have a na/t and i have been told that i need to set a voltage clamp on my map sensor , but in all honesty iv , no i dea what a volt clamp is or what i need to clamp the voltage at , , so any help would be great Edited October 11, 2008 by dr_jekyll (see edit history) Quote Link to comment Share on other sites More sharing options...
bignum Posted October 11, 2008 Share Posted October 11, 2008 A fuel cut defender is basically a voltage clamp, Quote Link to comment Share on other sites More sharing options...
JustGav Posted October 11, 2008 Share Posted October 11, 2008 Yes, a voltage clamp is used on boost cut defenders as well, it would more than likely be a custom bit of electronics. PS : You planning on paying for your membership with all the free advice you have been getting? Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 11, 2008 Share Posted October 11, 2008 I know exactly what voltage to clamp it at but I'm not telling until you a) pay up for membership and b) type nicely - commas are not the way to start a sentence -Ian Quote Link to comment Share on other sites More sharing options...
Steve Posted October 11, 2008 Share Posted October 11, 2008 i know exactly what voltage to clamp it at but i'm not telling until you a) pay up for membership and b) type nicely - commas are not the way to start a sentence -ian Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2008 Author Share Posted October 11, 2008 ther we go gentlemen , memmbership payd , comma gone . Quote Link to comment Share on other sites More sharing options...
Muffleman Posted October 11, 2008 Share Posted October 11, 2008 I know exactly what voltage to clamp it at but I'm not telling until you a) pay up for membership and b) type nicely - commas are not the way to start a sentence -Ian We've missed you mate Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted October 11, 2008 Share Posted October 11, 2008 ther we go gentlemen , memmbership payd , comma gone . I see 2 commas, but thanks for the cash , Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2008 Author Share Posted October 11, 2008 I see 2 commas, but thanks for the cash , the one in the intial post was the comma we were refering to. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 11, 2008 Share Posted October 11, 2008 I was wondering if anybody had ever used a voltage clamp on the map sensor to stop it from bringing up an error code , i have a na/t and i have been told that i need to set a voltage clamp on my map sensor , but in all honesty iv , no i dea what a volt clamp is or what i need to clamp the voltage at , , so any help would be great If you by an emanage, this feature is included;) Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2008 Author Share Posted October 11, 2008 If you by an emanage, this feature is included;) that is nice to know , im just wating to recive some quotes on stand alone units so if they are to expensive for me at the moment i think an emanage is the only way to go . Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted October 12, 2008 Share Posted October 12, 2008 you could check valve the map sensor. Quote Link to comment Share on other sites More sharing options...
bignum Posted October 12, 2008 Share Posted October 12, 2008 you could check valve the map sensor. So it see`s no pressure, Quote Link to comment Share on other sites More sharing options...
Wez Posted October 12, 2008 Share Posted October 12, 2008 So hang on a sec. You already have an NA/T and you are now looking at replacement and piggyback ECUs. What are you using to control fuel and ign at the moment? Quote Link to comment Share on other sites More sharing options...
Terminator Posted October 12, 2008 Share Posted October 12, 2008 the one in the intial post was the comma we were refering to. Will you use capital letters at the start of each sentence? Did you buy the car as an NA/T? Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted October 12, 2008 Share Posted October 12, 2008 So it see`s no pressure, precisely, no pressure only vacuum Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 12, 2008 Author Share Posted October 12, 2008 i have tried to use a one way valve but the car did not like it one bit , i have jsut converted the car to a n/a-t , and i have been trying differnt fuel managment mehtods , but the map sensor is the only problem i am having Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 12, 2008 Author Share Posted October 12, 2008 Will you use capital letters at the start of each sentence? Did you buy the car as an NA/T? no , this is not an english exam Quote Link to comment Share on other sites More sharing options...
bignum Posted October 12, 2008 Share Posted October 12, 2008 precisely, no pressure only vacuum So the fuel pump will never switch to 12volts and it will probably run lean,not good. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 12, 2008 Share Posted October 12, 2008 i have jsut converted the car to a n/a-t , and i have been trying differnt fuel managment mehtods What fuel management methods have you tried and where are you getting your info from to try this stuff? Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted October 12, 2008 Share Posted October 12, 2008 So the fuel pump will never switch to 12volts and it will probably run lean,not good. its na so when would it exactly ever see boost? the stock map wont read much above a couple of psi so why would you continue trying to make it do so when its only going to keep cutting fuel? Quote Link to comment Share on other sites More sharing options...
bignum Posted October 12, 2008 Share Posted October 12, 2008 He`s na/t, does this make any difference, i was refering to a tt map setup so may be different, Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 12, 2008 Author Share Posted October 12, 2008 its na so when would it exactly ever see boost? the stock map wont read much above a couple of psi so why would you continue trying to make it do so when its only going to keep cutting fuel? ihave tried to run a tt map sensor , but the lower voltage it gives to the ecu via the signal wire means the car runs lean so i tried upping the voltage down that signal wire by ruducing a 12v feed to 2.4v witch is what the na map sensor gives and i thaught then i could mariginly adjust that signa + or - using my apexi safc but to no avail. after that i replaced the tt map sensor with the ge map sensor so the car wa fueling correctly pre boost and fitted a one way valve on the vacume line witch did allw me to boost until i lifted off the throttle and the car flat out stalled at 50mph, not good , in regardes to the question , wher am i geting the information to try these thing , well, i just thaught i use a bit of initiative and try these thing before i asked for advice . Quote Link to comment Share on other sites More sharing options...
Wez Posted October 12, 2008 Share Posted October 12, 2008 in regardes to the question , wher am i geting the information to try these thing , well, i just thaught i use a bit of initiative and try these thing before i asked for advice . NA/T conversions have been discussed on here many times before and there NO NOs, ok methods and then the proper way to do things. At the moment I feel you are doing some NO NOs. Changing the map sensors wouldnt work as the scalings are different and you have no way of changing that within the stock ECU. It wouldnt help if you could as I very much doubt the stock NA ECU has any fuel or ignition maps for postive pressure anyway. There are plenty of cheapish AEM standalones for sale on here at the moment, if you have a 6 speed maybe you should look at one of these and do it properly before you kill your motor. All my opinion of course Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted October 12, 2008 Share Posted October 12, 2008 He`s na/t, does this make any difference, i was refering to a tt map setup so may be different, yeah being na-t makes a diff as the na map only reads to 2 or 3 psi before cutting fuel. As said above the best way of dealing with it is standalone but i've heard of lots of people in the US having sucess in using check valves so that when off boost (mani vacuum) the engine runs like normal or as close as it can, then when it comes on boost the check valve isolates the map and the ecu believes its at WOT(ambient pressure or slightly over), after that you use something like mapECU to tune fuel for boost with its internal 35psi map sensor. Quote Link to comment Share on other sites More sharing options...
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