Glfanboy9967 Posted December 26, 2019 Share Posted December 26, 2019 (edited) Hello everyone I am looking for advice and help as to fix my high idle issue and problems with my digital speedometer. As far as the high idle problem i will start the car and it will idle at 2000 rpms then when it’s warm it will fall to 1100 rpms and won’t go down from there I have checked for vacuum leaks and the air idle control but nothing sees to work I’d rather not take it to a shop and pay thousands of dollars for something that could be very simple Edited December 26, 2019 by Glfanboy9967 Quote Link to comment Share on other sites More sharing options...
DaveT Posted December 26, 2019 Share Posted December 26, 2019 What kind of fuel system? Quote Link to comment Share on other sites More sharing options...
Glfanboy9967 Posted December 26, 2019 Author Share Posted December 26, 2019 Mpfi Quote Link to comment Share on other sites More sharing options...
naru2 Posted December 26, 2019 Share Posted December 26, 2019 MPFI,but,what year? turbo? Adjust idle speed w/the large vertical brass screw on the throttle body Quote Link to comment Share on other sites More sharing options...
Glfanboy9967 Posted December 27, 2019 Author Share Posted December 27, 2019 Mpfi 1987 turbo Quote Link to comment Share on other sites More sharing options...
Glfanboy9967 Posted December 30, 2019 Author Share Posted December 30, 2019 On 12/26/2019 at 3:33 PM, naru2 said: MPFI,but,what year? turbo? Adjust idle speed w/the large vertical brass screw on the throttle body Naru2 : it is a 1987 Turbo gl 10 Quote Link to comment Share on other sites More sharing options...
naru2 Posted December 31, 2019 Share Posted December 31, 2019 Adjust idle speed w/the large vertical brass screw on the throttle body Quote Link to comment Share on other sites More sharing options...
Glfanboy9967 Posted January 30, 2020 Author Share Posted January 30, 2020 Where exactly on the throttle body ? and reference point you could supply would be appreciated Quote Link to comment Share on other sites More sharing options...
loyalematt Posted January 30, 2020 Share Posted January 30, 2020 1 hour ago, Glfanboy9967 said: Where exactly on the throttle body ? and reference point you could supply would be appreciated I believe he is referring to the vertical brass screw illustrated here... Be sure to verify that your idle air solenoid is working properly, as well as your O2 sensor(s). These give feedback to the ecm to control air/fuel ratio, and you don't want to turn that adjustment screw unless you know that that there are no vacuum leaks or other issues affecting your idle first. Quote Link to comment Share on other sites More sharing options...
naru2 Posted January 30, 2020 Share Posted January 30, 2020 (edited) Not quite,but,it is nearby. Edited January 30, 2020 by naru2 Quote Link to comment Share on other sites More sharing options...
loyalematt Posted January 31, 2020 Share Posted January 31, 2020 1 hour ago, naru2 said: Not quite,but,it is nearby. Much better diagram. Is that adjustment screw capped? Seems like I recall it being covered, so you had to drill the cap and pull it off. I could be mistaken. Quote Link to comment Share on other sites More sharing options...
naru2 Posted January 31, 2020 Share Posted January 31, 2020 No caps that I have ever seen. Quote Link to comment Share on other sites More sharing options...
Glfanboy9967 Posted February 8, 2020 Author Share Posted February 8, 2020 Thank you very much for the information got it fixed and the idle is perfect now turns out there was a lose vacuum line too but the idle was still high when I fixed that so I got it perfect at 700 rpms now does anyone know how to fix the digital cluster my speedometer doesn’t work nor does the lit to tell me my diff lock is working Quote Link to comment Share on other sites More sharing options...
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