Odd Sr20det Prob(could you be the one to figure it out?)

[GetMyDrift?]

s13 blacktop

Hey guys, having an epic problem and noone in my area can figure it out. Here it is, somewhat long but i numbered so its easy to trace. Thanks.

Problem began as:
1.Coilover burnt up while driving.
2.One of my connectors burnt as well. Used a friends harness and new coilpack and it burnt up in 3 mins.
3. Since then I have gotten a new coilpack and checked wire harness and regrounded it to the intake mani.(also sodered a new clip to my harness that burnt up and I have used both of our harnesses regularly to check each time)
4. I have also wired in a Q45 ignitor chip to see if the chip was the prob. There is still no spark on that #1 cylinder(its the one that burnt up in the beginning).
5. I changed spark plugs and that didnt help either. There is 12 volts getting to the #1 coilpack not only did I check with the multimeter but it gets hot as well after a few mins of letting it idle like it will burn up like the other ones if i let it keep running.
6. When I just have the coilpack out while the car is ideling and I unplug the connector it seems like the car runs better, when I plug it back in it kinda bogs a bit, again this is while the coilpack is OUT of the spark plug hole. I have two different coilpacks that I alternate each time i try something new. When I plug one of my bad coilpacks in using this same method the car dies instantly.
6. *NOTE* This is not a freshly swapped motor. I have been driving 6+ months with no problems at all and attened drift and autox events. It just happened all of a sudden.
7. All I can think of is maybe the wiring that goes to the ECU(but i just highly doubt that) or I read there are 4 Coil Drivers in the ECU, maybe one failed?

[statickx991]

can you post a video . and it could be one of the drivers in the ecu

[GetMyDrift?]

Ya I can post as many vids of whatever is needed to be seen tommorow. It just seems so weird to think a driver could have failed cuz I have never known of that to actually happen to anyone.

[statickx991]

yea it is pretty freaking rare for that to happen but sadly it does. if worst comes to worst get a buddy wit the same swap and take his ecu to try it since you know its a known good one and see if it burns the coil up. is it throwing any codes?

[GetMyDrift?]

Its not hooked to CEL (was like that when I got it and I never messed with it..)

[statickx991]

i believe you can still pull the codes by the ecu led light. i pulled this info off sr20forum.com so if im wrong im sorry lol


Locate the ECU (under your dash in the center) and look for a small screw next to a LED (towards the back end).
Turn the ignition to the ON position (engine not running).
Turn the screw fully clockwise, wait 2 seconds, and then turn it fully counter-clockwise.

The LED will start to display the code by a series of long flashes, followed by a series of short flashes. Your check engine light on the instrument cluster will also flash in the same sequence. This sequence will repeat.
11 Crank angle sensor/circuit (1988 to 1990); Crankshaft position sensor (1991 to 1996)
12 Air flow Meter/circuit open or shorted
13 Cylinder head temperature sensor(Maxima and 300ZX models); all others coolant temperature sensor circuit
14 Vehicle Speed Sensor signal circuit is open
15 Mixture ratio is too lean despite feedback control; fuel injector clogged
21 Ignition signal in the primary circuit is not being entered to the ECU during cranking or tuning
22 Fuel pump circuit (Maxima and 1987 and later 300ZX models); all others idle speed control valve or circuit
23 Idle switch (throttle valve switch) signal circuit open
24 Park/netural switch malfunctioning
25 Idle speed control valve circuit is open or shorted
26 Turbo boost
28 Cooling fan
29 Fuel system rich
31 1984 through 1986 EFI models; Problem in air conditioning system; all other models: ECU internal problem
32 1984 through 1986 EFI models; check starter system. All other models: EGR malfuntion (California models)
33 Oxygen sensor or circuit (300ZX left side) - all other models EGR malfunction
34 Detonation (Knock) sensor
35 Exhaust gas temperature sensor (California models)
36 EGR transducer
37 Closed loop control/front oxygen sensor (Maxima)
41 Maxima and 1984 through 1987 300ZX models; fuel temp sensor circuit. All other models: air temperature sensor circuit
42 1988 and later 300ZX models; fuel temperature sensor circuit; all other models: throttle sensor circuit
43 The mixture ratio is too lean despite feedback control; fuel injector clogged (1987 Sentra only): All others; Throttle position sensor circuit is open or shorted
44 No trouble codes stored in ECU
45 Injector fuel leak (California models only)
51 Fuel injector circuit open (California models only)
53 Oxygen sensor (300ZX right side)
54 Short between automatic transmission control unit(TCU) and ECU
55 Normal engine management system operation is indicated
63 Misfire detected - cylinder no. 6
64 Misfire detected - cylinder no. 5
65 Misfire detected - cylinder no. 4
66 Misfire detected - cylinder no. 3
67 Misfire detected - cylinder no. 2
68 Misfire detected - cylinder no. 1
71 Misfire detected - random
72 Catalytic converter malfunction (right side)
74 EVAP pressure sensor
75 EVAP leak
76 Fuel injection system
77 Rear oxygen sensor
81 Vacuum cut bypass valve
82 Crankshaft sensor
84 Automatic trans-to-fuel injection communication
85 VTC solenoid
87 EVAP canister purge control
91 Front oxygen sensor
95 Crankshaft sensor
98 Coolant temperature sensor
101 Camshaft sensor
103 Park/neutral switch
105 EGR and canister control valve
108 EVAP volume control
0505 No self diagnostic codes present
0101 Camshaft position sensor
0102 Mass airflow sensor/circuit
0103 Coolant temperature sensor
0104 Vehicle speed sensor
0111

EVAP purge flow monitoring system
0114 Fuel system rich
0115 Fuel system lean
0201 Ignition signal
0203 Closed throttle switch
0205 IACV/AAC valve
0208 Overheating
0213 EVAP system
0214 Purge volume control valve
0301 ECM control unit
0302 EGR function
0303

Front heated oxygen sensor malfunction
0304 Knock sensor
0305 Exhaust gas temperature sensor
0306 EGRC BPT valve
0307 Closed loop operation
0309 Vent control valve
0311 Vacuum cut valve bypass valve
0312 EVAP system purge control valve
0401 Intake air temperature sensor
0402 Fuel temperature sensor or circuit
0403 Throttle position sensor
0409 Front oxygen sensor
0410 Front oxygen sensor
0411 Front oxygen sensor
0412 Front oxygen sensor
0503 Front oxygen sensor
0510 Rear oxygen sensor
0511 Rear oxygen sensor
0512 Rear oxygen sensor
0514 EGR system
0605 Cylinder 4 misfire
0606 Cylinder 3 misfire
0607 Cylinder 2 misfire
0608 Cylinder 1 misfire
0701 Multiple cylinder misfire
0702 Catalytic converter
0704 EVAP system
0705 EVAP system
0706 Fuel injection system malfunction
0707 Rear oxygen sensor
0801 Vacuum cut valve bypass valve or circuit
0802 Crankshaft sensor
0803 Absolute pressure sensor
0804 A/T diagnosis comm line
0807 EVAP canister purge control
0901 Front oxygen sensor heater
0902 Rear oxygen sensor heater
0903 Vent control valve
0905 Crankshaft position sensor
0908 Coolant temperature sensor
1003 Park/neutral switch
1005 EGR solenoid valve circuit
1008 EVAP system
1101 Inhibitor switch
1102 A/T vehicle speed sensor
1103 A/T first signal
1104 A/T second signal
1105 A/T third signal
1106 A/T fourth signal
1107 A/T torque converter clutch
1108 Shift solenoid A
1201 Shift solenoid B
1203 Overrun clutch solenoid
1204 TCC solenoid
1205 Line pressure solenoid
1206 TPS for A/T
1207 Speed signal A/T
1208 A/T fluid temperature sensor
1302 MAP/BAR switch solenoid valve or circuit
1305 Fuel pump control module or circuit
1308 Cooling fan

[GetMyDrift?]

Alright i will checkout it out in the morning thanks for posting that.

[statickx991]

no problem. good luck

[GetMyDrift?]

I have also checked the whole engine harness and opened the ECU up and everything is good. Should i reset timing and see if that is it?

[Morgs]

Was there ever any solution to this? I have the same problem going on right now, coil pack burnt up took harness with it, swapped 2 coil packs new harness made sure it was grounded and it idled fine, when i went to drive home coil pack went up again. Any Help would be great!

[KiLLeR2001]

Grounding issue.

[katLOL]

You have another wire melted together I dont remember all the wire colors but the black/yellow wire is your 12v constant (I think the black) is your ground all the others are trigger wires to your ECU. Take your test light and attach a small piece of wire into the 12v port of your #1 plug attach your alligator clip to the other end of the short piece of wire turn the ignition switch to on and check the other 2 ports only 1 shoud light the test light if both light up then trace the trigger wire to where its shorted to gound