Chriz88DX

iTrader: (1)

ok ebfore i begin i have searched this and have come up with nothing.

my car is a s4 na

my car has skipping lately but only between 2k and 3k and some times at 7k and my tach does not work inthe dash

i have checked the spark and at first i found that my #2 trailng coil was dead that would explain why the tach was not working.

but while checking the spark i found that both tailing coils would stop fireing at random

so i got out the timing light and tried to check the timing useing the trailing coil and they the #1 trailing coil was firng at idle but when i gave it gas the light would flicker and cut out

so i replaced the trailing coil that was not firing and it did not help at all

so i brought a low mileage trailing coil pack (S4) and pluged it in and i stil have the skipping problem

so where should i look next the ecu or ESPS (ecentic shaft position sensor)

thats for the help guys in advance

also would the s5 trailing coils plug right in
and if it is my ecu which one could i get

SirCygnus

iTrader: (1)

what part of georgia do you live in?

Chriz88DX

iTrader: (1)

snellivlle why

Chriz88DX

iTrader: (1)

any one

scathcart

how are your spark plugs? worn plugs can cause your symptoms.

Chriz88DX

iTrader: (1)

plugs are good i just replaced them i just got another trailing coil but it still misfires and skips could it be the ecu

lonewolfrx

could it be a grounding problem?

Chriz88DX

iTrader: (1)

ok i have tried every thing but the ecu so that is next any one know the codes of the s4 ecu's

lonewolfrx

do you mean ecu code numbers or the trouble codes?

trouble codes (i think these codes go up to 95)

1 Ignition Coil - Trailing Side (1989-1991).
1 Crank Angle Sensor (1984-1988).
2 Crank Angle Sensor - No Signal.
2 Air Flow Meter (1984-1988).
3 Crank Angle Sensor - G Signal.
3 Water Thermo Sensor (1984-1988).
4 Intake Air Thermo Sensor.
5 Knock Sensor.
5 Oxygen Sensor (1984-1988).
6 Speedometer Sensor.
6 Throttle Sensor (1984-1988).
7 Boost Sensor (With Turbocharger, 1984-1988).
7 Pressure Sensor (Without Turbocharger, 1984-1988).
8 Air Flow Meter.
9 Water Thermo Sensor.
9 Atmospheric Pressure Sensor (1984-1988).
10 Intake Air Thermo Sensor.
11 Intake Air Thermo Sensor (1992-1995).
11 Throttle Sensor - Full Range (1989-1991).
12 Throttle Sensor - Full Range.
12 Coil with Igniter - Trailing Side (1984-1988).
13 Pressure Sensor.
14 Atmospheric Pressure Sensor.
15 Oxygen Sensor.
15 IAT Sensor - Dynamic Chamber or Intake Air Pipe (1984-1988).
16 EGR Switch.
17 Feedback System.
18 Throttle Sensor - Narrow Range.
20 Metering Oil Pump Position Sensor.
23 Fuel Thermo Sensor.
25 Solenoid Valve - Pressure Regulator Control.
26 Metering Oil Pump - Stepping Motor.
27 Metering Oil Pump.
30 Split Air Solenoid Valve.
31 Solenoid Valve - Relief.
32 Solenoid Valve - Switch.
33 Port Air Solenoid Valve.
34 Solenoid Valve - Idle Speed Control.
37 Metering Oil Pump.
38 Solenoid Valve - Accelerated Warm Up System.
39 Solenoid Valve - Relief 2.
40 Solenoid Valve - Purge Control.
42 Solenoid Valve - Turbo Pre Control.
43 Solenoid Valve - Wastegate Control.
44 Solenoid Valve - Turbo Control.
45 Solenoid Valve - Charge Control.
46 Solenoid Valve - Charge Relief.
50 Solenoid Valve - Double Throttle Control.
51 Fuel Pump Relay.
54 Air Pump Relay.
71 Injector - Front Secondary.
73 Injector - Rear Secondary.
76 Slip Lockup Off Signal.
77 Torque Reduced Signal.

ecu numbers:

86-87 NA N326 18 880, N3Y6 18 880
87 Turbo N332 18 880
88 NA N327 18 880
88 Turbo N333 18 880
88 Convertible N338 18 880
89 NA California N350 18 880
89 NA Fed. N351 18 880
89 Conv. CA N352 18 880
89 Conv. Fed. N353 18 880
89 Turbo N370 18 880

HAILERS

http://www.teamfc3s.org/info/article...odes/main.html

and the FSM section called CONTROL UNIT has the values for the wires that run b/t the ECU and the Trail coil assy.

Chriz88DX

iTrader: (1)

update i think i may of found it i was driving today and happen to look at my safc and the throttle singal was fluttering between 100% and 87% but i was off of the tps buttion even near redline it would do this does this mean my tps is not grounding right or the tps is bad their are no dead spots in it and when i turned it off and started it back up the tps was fine
but why would this make the trailing misfire

HAILERS

REMOVE the SAFC from pin 1X and drive the car.

Like the FSM in the CONTROL UNIT section says, the 1X is tied to the Trail coil. It's an output from the ECU to the trail coil assy and is the timing signal. The signal that causes the ignitor to fire. I'm suggesting there is something amiss with the wiring b/t the SAFC and 1X or a bad solder connection or ????? got me....with 1X. Ain't the ECU but the wiring/solder/whatever.

Chriz88DX

iTrader: (1)

where is pin 1x?