jtmny1999 Posted February 27, 2009 Share Posted February 27, 2009 Ok so I'm a little frustrated:confused:, ever since I finish my wiring the car started with no problems but had idle issues. It fouled the spark plugs running rich and made clicking noises(sounded like coils grounding) when I rev, so I started diagnosing the problems. 1. Coils- bad resistance| so I replaced them with new coils/ Power to coils is 14.7v so im getting enough power. 2. New plugs 3. Water Temp sensor- Good 4. TPS- Checks out fine. 5. ACC removed and cleaned. 6. Tried 3 dif MAFS. 2 s2 MAFS hunt for idle, 1 s1 MAF blown through runs better but still runs rough. 7. Bought Nissan Data scan to see if I can pin point the problem. But i cant even connect to the ECU (pissed me off) 8. Today I tried to adjust my idle but my freaking ECU doesn't have the LED light or idle adjustment screw. I cant find anywhere in the FSM how to set the ecu into diag mode (more pissed) So now I'm kinna mad at my car and want to kick it hard:fmad:, can anyone help me out? I'm thinking of finding someone around here that knows RB's and just pay them to get her fixed. If anyone has any suggestions or know someone that can help me out around here ill appreciated it thanks. Quote Link to comment Share on other sites More sharing options...
lucky Posted February 27, 2009 Share Posted February 27, 2009 Bad idle, running rich, have you checked all your vac lines? I read something over on nicoclub about the stock coils actually arcing through themselves to the valve covers. Seems a lot of guys are using some sort of epoxy to seal them up. I'll dig around over there and see if I can find it again. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted February 27, 2009 Author Share Posted February 27, 2009 Yeah I replaced the coils with new ones, I already checked for leaks but couldnt find any. thanks! Quote Link to comment Share on other sites More sharing options...
lucky Posted February 27, 2009 Share Posted February 27, 2009 Are you 100% that your MAF wiring is correct? Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted February 27, 2009 Author Share Posted February 27, 2009 The weird thing is when I blip the throttle it makes a loud click noise. Like a spark grounding but I got new coils so im so confused. I used both MAFS the S2 and S1, it revs past 2k so im thinking it is. The S2 mafs use the stock plug so I didnt wire it any different. Quote Link to comment Share on other sites More sharing options...
lucky Posted February 27, 2009 Share Posted February 27, 2009 Well a quick way to check the coils would be to wrap them in electrical tape, it should stop any arcing that would occur. I know you said they're new, but I'm just throwing ideas out there. I found the thread I was talking about and it seems most of it was directed toward high RPM misfires. If you'd like to take a look though, here you go: http://forums.nicoclub.com/zerothread/353364 Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted February 27, 2009 Author Share Posted February 27, 2009 Well a quick way to check the coils would be to wrap them in electrical tape, it should stop any arcing that would occur. I know you said they're new, but I'm just throwing ideas out there. I found the thread I was talking about and it seems most of it was directed toward high RPM misfires. If you'd like to take a look though, here you go: http://forums.nicoclub.com/zerothread/353364 Thanks ill check it out. I also checked the coil power and im getting 14.7 volts in the white main coil power wire so im getting enough power. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted February 27, 2009 Author Share Posted February 27, 2009 Ok so I put in a adjustable FPR last night, the fuel pressure is steady at 42psi. I also did the ecu diagnose, shorting (IGN)with(CHK) to pull the codes, the only code I got was 54 A/T transmission code. I am stumped, next thing to do I guess is eliminate the intercooler BOV and put a straight pipe, hopefully I have a leak somewhere. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 1, 2009 Author Share Posted March 1, 2009 I just finished cleaning up the oxidized head and painted it with engine paint to prevent grouding on coils. Now im only getting 14 v to power my coils and I now get CODE 21 on ecu. I am lost.... Quote Link to comment Share on other sites More sharing options...
Careless Posted March 1, 2009 Share Posted March 1, 2009 did you possibly paint over a ground or not hook an engine ground up properly? loud clicking noise? is there a relay that is wired somewhere that it is not supposed to be. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 1, 2009 Author Share Posted March 1, 2009 did you possibly paint over a ground or not hook an engine ground up properly? loud clicking noise? is there a relay that is wired somewhere that it is not supposed to be. I checked all my grounds everything looks good. When injectors go bad do they click? After warm up it clicks randomly also when I rev, i'm thinking injectors next. Quote Link to comment Share on other sites More sharing options...
jerryb Posted March 1, 2009 Share Posted March 1, 2009 Datascan.....are you sure all the wires are conneted correctly? Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 1, 2009 Author Share Posted March 1, 2009 Datascan.....are you sure all the wires are conneted correctly? I got it to work but once i start the car the program freezes, I also figured out that the Variable timing valve next to cylinder 1 is the one that keeps clicking really loud. Quote Link to comment Share on other sites More sharing options...
jerryb Posted March 1, 2009 Share Posted March 1, 2009 Does Datascan currently read the ECU number when the car isnt running? I got it to work but once i start the car the program freezes, I also figured out that the Variable timing valve next to cylinder 1 is the one that keeps clicking really loud. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 2, 2009 Author Share Posted March 2, 2009 Does Datascan currently read the ECU number when the car isnt running? yeah it does but once i start it the comp wont recognize the usb wire freezing the software. i got vista ultimate. Quote Link to comment Share on other sites More sharing options...
jerryb Posted March 2, 2009 Share Posted March 2, 2009 Try re-installing the drivers. VISTA has many driver issues. It's that or you have a short of some type. Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 2, 2009 Author Share Posted March 2, 2009 I installed it on XP home and I have the same problem. "One of the usb devices has malfunction" "USB device not redognized" Quote Link to comment Share on other sites More sharing options...
jerryb Posted March 2, 2009 Share Posted March 2, 2009 And just to confirm, it does this on XP only after you start the car? Right..... I installed it on XP home and I have the same problem. "One of the usb devices has malfunction" "USB device not redognized" Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted March 2, 2009 Author Share Posted March 2, 2009 And just to confirm, it does this on XP only after you start the car? Right..... Works fine but once i crank it and start the car it freezes. I have no idea how to find a short.. Quote Link to comment Share on other sites More sharing options...
slown280z Posted March 2, 2009 Share Posted March 2, 2009 Is the ECU interface Consult I (gray connector)? If so, have you tried other software with your adapter? ECUtalk comes to mind... 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.