Microtech Area is for discussing Microtech systems

Microtech Can't calibrate Tps properly

Old 08-06-03, 04:30 PM
Junior Member
5 Year Member
Thread Starter
Join Date: May 2002
Location: Poulsbo, WA
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Unhappy Can't calibrate Tps properly

I dont know whether it is the throttle body or the throttle cable or what but everytime I try to calibrate it the tps shoots to 99% at about half throttle. I warm it up to operating temp, let the wax pellet drop and them go to opttpscal and bring the tps down to 0%. The opttpscal is always a really high number also. It's normally between 50-70%. I have to mess with the fast idle screw and the tps screw also. Does anywone have any idea what I am doing wrong or how I can fix it.
turbotuner is offline  
Old 08-06-03, 05:54 PM
Rotary Enthusiast
10sec rx7's Avatar
Join Date: Mar 2001
Location: Sydney, Australia
Posts: 1,307
Likes: 0
Received 0 Likes on 0 Posts
this is correct on the Mazda TPS, they only read about 1/2 way at the most before they run out of travel,

50%-70% is fine on the tpscal, mine is at about 55%

10sec rx7 is offline  
Old 08-06-03, 07:47 PM
Junior Member
5 Year Member
Thread Starter
Join Date: May 2002
Location: Poulsbo, WA
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Thanks, the fast idle cam was off adjustment, I am going to fix that tomorrow and hopefully that helps out.
turbotuner is offline  
Old 08-08-03, 07:39 PM
Senior Member
10 Year Member
Silver88GXL's Avatar
Join Date: Aug 2001
Location: GA
Posts: 333
Likes: 0
Received 0 Likes on 0 Posts
Are you using the same TPS as was originally on the car? I ran into a similar problem when I put an 89 TPS on my car. No matter how I adjusted it on the manifold or played with the settings on the laptop, it never went to full throttle, I think the highest I could get it was like 60% throttle. A multimeter and about an hours of consulting an 88 and 89 FSM helped determine the full range sensor was bad.

I knew the original worked so I bent the 4 tabs that hole the sensor onto the bracket and switched the sensors. All the sensors themselves are the same it is just how they are positioned on the mounting bracket.

Everything works just fine now.
Silver88GXL is offline  
Related Topics
Thread Starter
Last Post
Vendor Classifieds
03-30-19 10:17 PM
Megasquirt Forum
10-06-15 12:28 PM
Link Vi-PEC
10-01-15 01:59 PM

Thread Tools
Search this Thread
Quick Reply: Microtech Can't calibrate Tps properly

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:
Your question will be posted in: