SR20DET redtop in 91 coupe swap problem??

[ezyride]

I have put the motor in and wired everything up.. it starts but runs like shit (sputtering/and rich as hell) Code 21 apears on the ECU..

Has anyone experienced this? If so what did u do to fix it??

* it's not the ignitor chip.. i replaced it and reset the computer.

P.S. i followed heavy throttle's instructions

[mjjstang]

did you time it, compression, all the other simple tests that you could do. please explain your situation a little bit better, ther could be a million things wrong wiht it. One by one pull your coils to see if it stumbles more, if it does then the cylindar is firing and getting fuel. do it to each and see if it tells you anything.

[ezyride]

do u think that bad grounds might cause that problem??

[SiI40sx]

poorly connected MAF, timing could be off, there could be many things, diagnose all

[jdm_s14_zenki]

pressure test the for boost leaks and vacuum leaks. sounds exactly like a bad vacuum leak to me.

also sounds like it could be timing too retarded, but advanced enough to get the engine to barely run. that could also be why ur running rich.

if these 2 things check out, but i'll put money down that its either one of these, check compression or do a leakdown. better yet, check all sensor voltages per FSM and see if all are ok. then if you still cant find the problem, try coilpack diagnosis, check coilpack harness ground, injector diagnosis, THEN a leakdown.

[jdm_s14_zenki]

sorry, pressure test the intake system is what i meant, cant edit right now cus im pinked :P

[ezyride]

well im gone try everything suggested.. i let u know

[ezyride]

i've tried all the suggested ideas.. I found that cyl 2 doesn't have spark but tested the coil and it works on the other cylinders.

.. I checked the wiring and look good..

Im using a 62 ecu on a red top. Doesn't anyone have an suggestions??

[rossfashow]

it could be that your idle sensor has gone bad. (iacv)

[ezyride]

i don't understand why the iacv going bad will cause cyl 2 to have no spark??

[91s13]

i know you said you checked wiring, see if the ecu connecter is seated properly, make sure none of the pins are bent or have corrosion on them.

[ezyride]

i have checked the pins at the computer for corrosion or bent pins, looks fine, does anyone know what sends the signal to fire the coils? if its the ecu do u know what pins are for the coils???

[c2autoinc]

1 - Coil Pack 1 Output (Via power transistor Unit) - Red White
2 - Coil Pack 2 Output (Via power transistor Unit) - Red Yellow
3 - Tachometer signal output - Yellow Red
4 - ECCS Relay - Red Black
5 - Ignition Pulse Monitor (For Trip Comp ?)
6 - Ignition Signal Ground - Black
7 - RX data (Signal from Nissan Consult hand terminal) - Green Black
8 - Coil Pack 3 Output (Via power transistor Unit) - Red White
9 - Coil Pack 4 Output (Via power transistor Unit) - Red White
10 -
11 -
12 - A/T signal DT3 (autotrans gear select ?)
13 - Ignition Signal Ground - Black
14 - CLK clock (timing signal) - Green White
15 - TX data (signal to Nissan Consult hand terminal) - Green
16 - MAFS signal input ( Mass Air Flow Sensor ) - White
17 - MAFS ground - Black
18 - Water Temp Sensor input - Blue Brown
19 - Oxyen Sensor input (O2) - White
20 - TPS input (throttle postion sensor) - White
21 - Sensor ground - Black
22 - CAS 180deg signal (Crank angle sensor) - White
23 - CHK check (check start) ? - Green Red
24 - Monitor check Lamp (red) (fault code lamp output)
25 - Exhaust over temp warning lamp output - Orange
26 - Exhaust temp sensor inout (Behind the Cat) - Blue Yellow
27 - Detonation sensorinput (knock sensor) - White
28 - TPS for A/T (kick down switch)
29 - Sensor ground - Black
30 - CAS 180deg signal (crank angle sensor) - White
31 - CAS 1deg signal (crank angle sensor) - Black
32 - Speed sensor input - Yellow Green
33 -
34 - Start signal (from ignition switch) - Orange
35 - A/T neutral switch input - Green Orange
36 - IGN (ignition ON, from ignition switch) - Black Red
37 - TPS power output (power to throttle position sensor) - Light Green Red
38 - ECCS power - Black White
39 - ECCS ground - Black
40 - CAS 1 deg signal (crank angle sensor) - Red Black
41 - A/C on input (Air Con ON from A/C panel) - Blue Green
42 - A/T signal DT1 (auto trans gear select ?)
43 - Power steering switch (speed proportional control output) - Purple White
44 - A/T signal DT1 (auto trans gear select ?)
45 - Ambient air tamp sensor input - Blue White
46 - ECCS backup power - Red
47 - ECCS power - Black White
48 - ECCS ground - Black
101 - Injector No. 1 drive output - White Black
102 - EAI control solenoid output (egr valve control ?) - Orange Black
103 - Injector No.3 drive output - Green Black
104 - Fuel pump relay output - Black Purple
105 - Fuel pressure control module - Red White
106 - A/C on output (Air conditioner on relay signal) - Green Black
107 - Injector ground - Black
108 - Injector ground - Black
109 - Reverse electrical flow return circuit (alternator fail input) - Red
110 - Injector No. 2 drive output - Yellow Black
111 - Turbo boost pressure control solenoid (over boost cut ?) - Orange Black
112 - Injector No. 4 drive output - Blue Black
113 - AAC valve control (Auxiliary Air Control, Idle speed control) - Light Blue
114 -
115 -
116 - Injector ground – Black

sourced from another place, but i don't remember where, i'm not taking credit for it. I have a picture of the pin out numbers but idk how to put on pictures...

[ezyride]

thanks i will try it.. hopefully i will figure this out

[ezyride]

email me the pics

[email protected]

[ezyride]

RESOLVED!!! from ecu pin 2 (Coilpack 2) to the ignitor had a faulty wire causing the motor to run on 3 cyl. I re ran the wire and the car runs on for 4 cyl now. Purrs now

That was a three day mind bogger..

I would like to thank everyone that posted to help me with this problem

[ezyride]

RESOLVED!!! from ecu pin 2 (Coilpack 2) to the ignitor had a faulty wire causing the motor to run on 3 cyl. I re ran the wire and the car runs on for 4 cyl now. Purrs now

That was a three day mind bogger..

I would like to thank everyone that posted to help me with this problem

I hope i don't have any more to worry about

[ezyride]

i still get code 21.. on the ecu.. and it seems to stay and wont hold idle..

[jdm_s14_zenki]

check ing ground (coilpack harness ground) and check plugs

[ezyride]

finally found proper ecu reset.. i get code 55..

Now the car idles low and when revved to 3500-4100 run's like shit.. (sputting) and when let go off gas it dies.

im using NGK R5671a-7 (number 7 race plugs) gaped at .030

does anyone have any ideas now??