The FC3S Information Booth

Whizbang · 09-10-2008, 09:48 PM

Updated: 2-11-09

The following is a compiling of all the useful information i have gathered and attempted to refine over the last couple years. This is my most current version. I will update when i can. If anyone has anything good to add, let me know. Credit will be given. I would like to keep this as neat as possible.

Engine and Control Information

Q: What size injectors did my car come with?

A:
84-85 13B NA (GSL-SE)

195500-0900
680cc
low square center
orange in color

86-87.5 13B 6PI (non turbo)

195500-1350
460cc
low square center
red in color (fades to pinkish)

86-87.5 13BT (turbo)

195500-1370
550cc
low square center
tan in color

87.5-88 13B 6PI (non-turbo)

195500-1350
460cc
high square offset
purple in color

87.5-88 13BT (turbo)

195500-1370
550cc
high square offset
purple in color

89-91 13B 6PI (non-turbo)

195500-2010
460cc
high oval center
red in color

89-91 13BT (turbo)

195500-2020
550cc
high oval center
purple in color

Q: What ratio for premixing?
A: About 1oz. to 1 Gal. works the best for most, but depending on the application you may want to add more. Most low ashing 2 stroke oil works great for this application.

Q: Can i lower my coolant temps with additives?
A: A few small studies have shown that Redline Water Wetter, and the like, are corrosive to coolant seals and are advised against. Redline being the worst. Its recommend to aviod their use and if you do, flush it out as soon as possible. (provided by TitaniumTT)

Q: What are the factory spark plugs?
A: BUR9EQ for the trailing, BUR7EQ for the leading

Q: What are all the ECU codes?
A: They are as follows:

N304 - 1984 to 1985 13B DEI (GSL-SE)
N326 - 1986 to 1987.5 13B 6PI
N318 - 1986 to 1987.5 13BT
N319 - 1986 to 1988 13BT (JDM)
N332 - 1987.5 to 1988 13BT
N333 - 1987.5 to 1988 13BT (?)
N338 - 1988 Convertible 13B 6PI
N350 - 1989 to 1991 13B 6PI
N351 - 1989 to 1991 13B 6PI (cali emissions)
N370 - 1989 to 1991 13BT
N374 - 1989 to 1991 13BT (JDM)
N380 - 1989 to 1991 13BT (Euro spec) [thanks Aees]
N3A1 - FD3S ECU number

**Note: if anyone has more Ecu code information, let me know!**

Thanks to "amx tii", "Wizz" and "Flooder" for information donations in this section.

Q: How do i check trouble codes on the 1986-1988 cars?
A: see this thread HERE

Q: What do the power steering computer error codes mean?
A: The power steering computer uses a series of audible "beeps" to communicate. These are generally heard once the car is turned off.

1 Beep - Speed sensor signal - may occur while driving if shorts exist in harness or sensor wiring.
2 Beeps - Engine speed signal
3 Beeps - Stepping motor signal
4 Beeps - Power steering computer failure
5 Beeps - steering sensor signal

Q: What are some of the differences in the steering system and how does it work?
A: The second generation Rx-7 was first offered with a speed and G-sensing power steering with electronically controlled variable assistance. This had a 15.2:1 ratio rack as compared to the
20.3:1 ratio rack the manual steering cars were equipped with.

This system uses a computer to gather information on both the vehicle speed and the steering angle. It then determines a lateral acceleration or "G Force" and then provides the predetermined amount of assistance needed. It even takes into account the roads Coefficient of Friction in the calcuations.

With the rise of the series 5 cars, a cheaper and for what its worth, less desirable, engine speed sensing power steering system was used on the base model GTU cars. The turbo and convertible models retained the former system.

Q: The motor seems to hesitate at about 3800 rpms?
A: This is a somewhat common problem. There a few things going on in this rpm range.

1. Secondary injectors coming on
2. Opening of the 5th / 6th ports on the 13B 6PI cars

Mostly this is a grounding issue. Clean or remake ground connections between the battery, chassis and engine.

Q: There is a strange, mustard like substance in my oil cap and filler tube?
A: Those in the know, call it "lung mustard". Essentially, your PCV system is faulty and the crankcase pressure is not being vented. Common after people mess with the emissions systems during a rats nest removal. There are a few solutions to this.

Reconnect the PCV system per the FSM or Haynes manual.
Connect a line from the filler tube to a vacuum source. A check valve is needed for turbo cars.
Drill about a 1/4" hole in the oil cap. Cheap but effective.

Q: I have heard different things about modifying the throttle body, whats the truth?
A: See the The Throttle Body Mod Thread

Q: Why does my 86 model start without the clutch depressed?
A: A starter interlock was not added until 1987.

09-10-2008, 09:48 PM	#1
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 20	The FC3S Information Booth Updated: 2-11-09 The following is a compiling of all the useful information i have gathered and attempted to refine over the last couple years. This is my most current version. I will update when i can. If anyone has anything good to add, let me know. Credit will be given. I would like to keep this as neat as possible. Engine and Control Information Q: What size injectors did my car come with? A: 84-85 13B NA (GSL-SE) 195500-0900 680cc low square center orange in color 86-87.5 13B 6PI (non turbo) 195500-1350 460cc low square center red in color (fades to pinkish) 86-87.5 13BT (turbo) 195500-1370 550cc low square center tan in color 87.5-88 13B 6PI (non-turbo) 195500-1350 460cc high square offset purple in color 87.5-88 13BT (turbo) 195500-1370 550cc high square offset purple in color 89-91 13B 6PI (non-turbo) 195500-2010 460cc high oval center red in color 89-91 13BT (turbo) 195500-2020 550cc high oval center purple in color Q: What ratio for premixing? A: About 1oz. to 1 Gal. works the best for most, but depending on the application you may want to add more. Most low ashing 2 stroke oil works great for this application. Q: Can i lower my coolant temps with additives? A: A few small studies have shown that Redline Water Wetter, and the like, are corrosive to coolant seals and are advised against. Redline being the worst. Its recommend to aviod their use and if you do, flush it out as soon as possible. (provided by TitaniumTT) Q: What are the factory spark plugs? A: BUR9EQ for the trailing, BUR7EQ for the leading Q: What are all the ECU codes? A: They are as follows: N304 - 1984 to 1985 13B DEI (GSL-SE) N326 - 1986 to 1987.5 13B 6PI N318 - 1986 to 1987.5 13BT N319 - 1986 to 1988 13BT (JDM) N332 - 1987.5 to 1988 13BT N333 - 1987.5 to 1988 13BT (?) N338 - 1988 Convertible 13B 6PI N350 - 1989 to 1991 13B 6PI N351 - 1989 to 1991 13B 6PI (cali emissions) N370 - 1989 to 1991 13BT N374 - 1989 to 1991 13BT (JDM) N380 - 1989 to 1991 13BT (Euro spec) [thanks Aees] N3A1 - FD3S ECU number Note: if anyone has more Ecu code information, let me know! Thanks to "amx tii", "Wizz" and "Flooder" for information donations in this section. Q: How do i check trouble codes on the 1986-1988 cars? A: see this thread HERE Q: What do the power steering computer error codes mean? A: The power steering computer uses a series of audible "beeps" to communicate. These are generally heard once the car is turned off. 1 Beep - Speed sensor signal - may occur while driving if shorts exist in harness or sensor wiring. 2 Beeps - Engine speed signal 3 Beeps - Stepping motor signal 4 Beeps - Power steering computer failure 5 Beeps - steering sensor signal Q: What are some of the differences in the steering system and how does it work? A: The second generation Rx-7 was first offered with a speed and G-sensing power steering with electronically controlled variable assistance. This had a 15.2:1 ratio rack as compared to the 20.3:1 ratio rack the manual steering cars were equipped with. This system uses a computer to gather information on both the vehicle speed and the steering angle. It then determines a lateral acceleration or "G Force" and then provides the predetermined amount of assistance needed. It even takes into account the roads Coefficient of Friction in the calcuations. With the rise of the series 5 cars, a cheaper and for what its worth, less desirable, engine speed sensing power steering system was used on the base model GTU cars. The turbo and convertible models retained the former system. Q: The motor seems to hesitate at about 3800 rpms? A: This is a somewhat common problem. There a few things going on in this rpm range. 1. Secondary injectors coming on 2. Opening of the 5th / 6th ports on the 13B 6PI cars Mostly this is a grounding issue. Clean or remake ground connections between the battery, chassis and engine. Q: There is a strange, mustard like substance in my oil cap and filler tube? A: Those in the know, call it "lung mustard". Essentially, your PCV system is faulty and the crankcase pressure is not being vented. Common after people mess with the emissions systems during a rats nest removal. There are a few solutions to this. Reconnect the PCV system per the FSM or Haynes manual. Connect a line from the filler tube to a vacuum source. A check valve is needed for turbo cars. Drill about a 1/4" hole in the oil cap. Cheap but effective. Q: I have heard different things about modifying the throttle body, whats the truth? A: See the The Throttle Body Mod Thread Q: Why does my 86 model start without the clutch depressed? A: A starter interlock was not added until 1987. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook Last edited by Whizbang; 05-09-2013 at 01:28 PM.