jeu510 Posted May 17, 2014 Report Share Posted May 17, 2014 Ok...just got done wiring and installing my s14 sr20 n/a in my dime but the car wont idle. It will start up fine but when rpm drops to idle, it stumbles and die. If I unplug the maf sensor, it will stay running but wont rev past 2500rpm. Any ideas? I've already swapped the maf so its not the maf. Quote Link to comment
r0p0doe Posted May 17, 2014 Report Share Posted May 17, 2014 I believe someone had a similar problem with a KA you sure the ecu is good? Quote Link to comment
DISLEXICDIME Posted May 17, 2014 Report Share Posted May 17, 2014 Adjust you iacv Quote Link to comment
jeu510 Posted May 19, 2014 Author Report Share Posted May 19, 2014 Dont know for sure if the ecu is good but dont see anything obvious for it to be bad. I've tried adjusting the iacv also and it does not affect it. It stumbles and dies after the idle speed comes down from high idle. Quote Link to comment
smoke Posted May 19, 2014 Report Share Posted May 19, 2014 Dirty injectors can cause this, also make sure you don't have a big vac leak somewhere. Quote Link to comment
smoke Posted May 19, 2014 Report Share Posted May 19, 2014 One other thing I am just going to throw out there. Make sure your MAF is pointed the right direction and not turned around the other way. Quote Link to comment
DISLEXICDIME Posted May 19, 2014 Report Share Posted May 19, 2014 Is your iacv clogged? have you checked codes Quote Link to comment
jeu510 Posted May 19, 2014 Author Report Share Posted May 19, 2014 i dont think injectors are clogged cus when maf is disconnected, it will idle...just wont be able to rev past 25k rpm. yes maf is also facing the correct way. i dont think its a clogged iacv for the same reason that if i unplug the maf, it will idle. during the maf being plugged in, if i try to keep the rpms up with out dying, it feels like chokes when reving it up. i dont see any vacuum leaks that are big enough to cause this problem, but i will recheck. OK....I think i know whats wrong....does the big air tube that feeds the iacv get its air before or after the maf? it was never hooked up so i dont know where it originally goes. Quote Link to comment
smoke Posted May 19, 2014 Report Share Posted May 19, 2014 I'm gonna say after so it is measured air. Quote Link to comment
jeu510 Posted May 19, 2014 Author Report Share Posted May 19, 2014 yeah, i think it is too and i dont have it hooked up after...i will try that and see...thanks guys! Quote Link to comment
paradime Posted May 19, 2014 Report Share Posted May 19, 2014 Is the ECU from a DE, or a DET? what letter and number are on the ECU box? E5 J5 C64? IF it's a 62 it's for a DET and will not work in a N/A application. That ECU will be looking for a bunch of information that is not there without a turbo. Quote Link to comment
jeu510 Posted May 19, 2014 Author Report Share Posted May 19, 2014 not sure about the ecu number, but will check when i get home...thanks again. Quote Link to comment
Dats Crazy Posted May 19, 2014 Report Share Posted May 19, 2014 Check the engine temperature sender sensor. Sr20de's are known for this. Saw this on a few Sr's where it does not rev up past 2.5 > 3 k rpm. Quote Link to comment
paradime Posted May 19, 2014 Report Share Posted May 19, 2014 Hopefully you'll find the ECU has WA on it in black or red lettering.The pins on the "NA" ECU are the same as S13 SR's but those ECUs will not control the VVT system on the s14. The early model N/A S14's have more pins than later ECU's, but the N/A "kouki's" are rare. If its an auto trans ECU it will have FK or WE on it. Quote Link to comment
jeu510 Posted May 20, 2014 Author Report Share Posted May 20, 2014 Well just checked and found that the ecu has wb.....what does that mean? Quote Link to comment
DISLEXICDIME Posted May 20, 2014 Report Share Posted May 20, 2014 If that iacv hose is not hooked up it won't idol Quote Link to comment
paradime Posted May 20, 2014 Report Share Posted May 20, 2014 The WB ECU is to an early 94-96 Silva auto trans SR. I have no idea what the differences are between the MT and AT ECUs though. I'll see if I can't track down the pinouts for you. There are lots of WA ECUs on Ebay, so all is not lost. You may even be able to make a straight across trade, because the WA is so common. Quote Link to comment
paradime Posted May 20, 2014 Report Share Posted May 20, 2014 Here's a link to a full s14 shop manual http://vacated.net/carstuff/Nissan%20Silvia%20S14%20FSM.pdf Not a lot of info on the ECU Quote Link to comment
jeu510 Posted May 20, 2014 Author Report Share Posted May 20, 2014 yeah i figured that i need to hook it up dislexicdime.....i just have it off at the moment and that is probrably my problem. i need to find me a air filter adapter that has the fitting for it or custom me a intake pipe from throttle body to maf to have a fitting for the hose. thanks paradime for the info...i will try hooking up the iacv hose first and see if that helps it....it that fails, i will look for the correct ecu. btw are the auto and manual engine harness the same? Quote Link to comment
DISLEXICDIME Posted May 20, 2014 Report Share Posted May 20, 2014 If I remember right the tps is differant Quote Link to comment
jeu510 Posted June 2, 2014 Author Report Share Posted June 2, 2014 ok...so i finally got a intake made to fit the iacv tube and it fixed it.....it has to be hooked up after the maf otherwise it will be considered a big vacuum leak. thanks again to all who put in their inputs. 1 Quote Link to comment
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