93 S13 KADE Running Rough - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

edhogan1224 · 06-30-2015, 07:36 PM

Okay so theres a bunch of threads about poorly running S13s but mine doesn't seem to fit along with any of their issues. So the solder in the MAF broke, and the car was in limp mode. Standard 2500 rpm redline, blah blah. Got home, pulled the MAF apart, resoldered the joints. Hooked it all back up, started it up and it still ran like shit. Took it for a test drive, and it's faster than ever (since I've had it, bone stock car 2nd owner). So WOT its great, no noticeable bogging or hesistation. It does smell like its rich though. But on steady cruising or idle it's all over the place stumbling, shuddering, almost stalling, etc. So what's up guys? Do I need to reset the ECU? Did limp mode kill the FPR?

edhogan1224 · 07-01-2015, 05:33 AM

Anybody? Gotta get this fixed asap

edhogan1224 · 07-02-2015, 12:27 PM

Well since I haven't gotten any insight, ill just post my troubleshooting/findings to maybe help the next person. So Ive ruled out the FPR, swapped for a new one and made no difference. Reset the codes on the ECU, throws a code 55 (all clear) so I don't think that's the issue. Tested the voltage on the MAF, input voltage is 10.86v @idle, decreases as RPM's increase. Output voltage (signal voltage) is 3.XXv @idle increasing smoothly in the 3.XXv range as the RPM's increase. Going to try and find a different MAF and see if anything changes.

edhogan1224 · 07-04-2015, 01:45 PM

So I got a used MAF, turns out the used one was bad -_-
$350, a reman MAF, and some swearing later, it turns out it was in fact the MAF after all.

erikforce1 · 07-08-2015, 09:51 PM

sorry I just saw your post. This had happen to me a couple of months ago. I was going to suggest to get a new MAF.l tried to resolder mine as well but it gave a voltage drop and was giving the ECU a false reading, making the engine run rough and rich. Sorry for the late response

edhogan1224 · 07-09-2015, 07:47 AM

No worries, it all got figured out in the end.

06-30-2015, 07:36 PM	#1
edhogan1224 Join Date: May 2015 Location: Maryland Age: 27 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	93 S13 KADE Running Rough Okay so theres a bunch of threads about poorly running S13s but mine doesn't seem to fit along with any of their issues. So the solder in the MAF broke, and the car was in limp mode. Standard 2500 rpm redline, blah blah. Got home, pulled the MAF apart, resoldered the joints. Hooked it all back up, started it up and it still ran like shit. Took it for a test drive, and it's faster than ever (since I've had it, bone stock car 2nd owner). So WOT its great, no noticeable bogging or hesistation. It does smell like its rich though. But on steady cruising or idle it's all over the place stumbling, shuddering, almost stalling, etc. So what's up guys? Do I need to reset the ECU? Did limp mode kill the FPR?

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07-01-2015, 05:33 AM	#2
edhogan1224 Join Date: May 2015 Location: Maryland Age: 27 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	Anybody? Gotta get this fixed asap

07-02-2015, 12:27 PM	#3
edhogan1224 Join Date: May 2015 Location: Maryland Age: 27 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	Well since I haven't gotten any insight, ill just post my troubleshooting/findings to maybe help the next person. So Ive ruled out the FPR, swapped for a new one and made no difference. Reset the codes on the ECU, throws a code 55 (all clear) so I don't think that's the issue. Tested the voltage on the MAF, input voltage is 10.86v @idle, decreases as RPM's increase. Output voltage (signal voltage) is 3.XXv @idle increasing smoothly in the 3.XXv range as the RPM's increase. Going to try and find a different MAF and see if anything changes.

07-04-2015, 01:45 PM	#4
edhogan1224 Join Date: May 2015 Location: Maryland Age: 27 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	So I got a used MAF, turns out the used one was bad -_- $350, a reman MAF, and some swearing later, it turns out it was in fact the MAF after all.

07-08-2015, 09:51 PM	#5
erikforce1 Join Date: May 2015 Location: 310 area Posts: 42 Trader Rating: (1) Feedback Score: 1 reviews	sorry I just saw your post. This had happen to me a couple of months ago. I was going to suggest to get a new MAF.l tried to resolder mine as well but it gave a voltage drop and was giving the ECU a false reading, making the engine run rough and rich. Sorry for the late response

07-09-2015, 07:47 AM	#6
edhogan1224 Join Date: May 2015 Location: Maryland Age: 27 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	No worries, it all got figured out in the end.