2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Is JSPEC TPS the same as US Spec?

Old 06-14-19, 01:32 PM
  #1  
Dak
Information Regurgitator
Thread Starter
 
Join Date: Feb 2001
Location: Sparta TN. United States
Posts: 1,288
Received 15 Likes on 12 Posts
Is JSPEC TPS the same as US Spec?

I just picked up a S5 jspec engine from a guy who bought someone's failed S4 to S5 TII conversion. Has I think a stuck seal on the front rotor and I think blown coolant seal cause nasty coolant came out of the front rotors spark plug holes, so he's going V8 and I bought the rotary for the turbo parts. Anyway upon looking at the T.B. it has a tps with a single plunger and no cam for the second plunger. My initial thought was that it has aS4 T.B. on it. Is this correct or was the JSPEC S5 use a different T.B. and TPS? I was under the impression they were the same.

A second question. If it is a S4 T.B. can I still modify it to us the FD TPS like some people have done on their S5 T.B.? Thanks.
Dak is offline  
Old 06-16-19, 06:43 AM
  #2  
Rotorhead for life
iTrader: (1)
 
Pete_89T2's Avatar
 
Join Date: Mar 2005
Location: Elkton, MD
Posts: 353
Likes: 0
Received 33 Likes on 27 Posts
Within series (S4 or S5) and within type (NA or turbo), the JDM and USDM throttle bodies & TPS sensors are essentially the same, with a few minor differences. I have a spare S5T2 JDM throttle body and my USDM TPS sensor bolted right up to it. Only difference I recall on the JDM TB is that it has a spring loaded adjust screw for the base idle/throttle stop adjustment (just like the TPS adjust screw), while the USDM TB uses a set screw & jam nut for that. So the one you got must be an S4 TB.
Pete_89T2 is offline  
Old 06-16-19, 12:59 PM
  #3  
Dak
Information Regurgitator
Thread Starter
 
Join Date: Feb 2001
Location: Sparta TN. United States
Posts: 1,288
Received 15 Likes on 12 Posts
Thanks. I had a feeling it was a s4. Add that to the list of things the person that started the conversion did that makes no sense. At this point if my S5 N/A TB and TPS can't be made to work it would probably be cheaper to convert to the FD UIM and TB. It would look and function better anyway.
Dak is offline  
Old 07-11-19, 11:58 AM
  #4  
Rotary Enthusiast
iTrader: (23)
 
Join Date: Nov 2007
Location: san diego
Posts: 824
Likes: 0
Received 0 Likes on 0 Posts
Yes, the tps you have is a s4. If the s5 engine is going in a s4 car, it is wise to use s4 throttle body and electronics on the s4 car. Much easier than wiring the s5 harness to a s4 car. I ran the same setup.
DR_Knight is offline  
Old 07-11-19, 12:49 PM
  #5  
Dak
Information Regurgitator
Thread Starter
 
Join Date: Feb 2001
Location: Sparta TN. United States
Posts: 1,288
Received 15 Likes on 12 Posts
Originally Posted by DR_Knight View Post
Yes, the tps you have is a s4. If the s5 engine is going in a s4 car, it is wise to use s4 throttle body and electronics on the s4 car. Much easier than wiring the s5 harness to a s4 car. I ran the same setup.
Therein lies the problem. It will now be going back into a S5. The confusing part is the original owner( not who I bought it from) was trying to transfer all the S5 wiring from a JDM front clip into the S4 shell and run it with a N374 ECU, so he needed the S5 TPS anyway.
Dak is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
20b240z
20B Forum
39
09-17-17 01:59 PM
Dltreezan
2nd Generation Specific (1986-1992)
6
04-06-10 11:29 PM
Spectator
2nd Generation Specific (1986-1992)
7
06-02-07 11:00 AM
Eternal_Gamer
2nd Generation Specific (1986-1992)
2
12-18-06 11:02 AM
Kenteth
2nd Generation Specific (1986-1992)
8
03-13-04 01:20 AM


Thread Tools
Search this Thread
Quick Reply: Is JSPEC TPS the same as US Spec?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: