 primary imputs to high cold idle |
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| 87m491 |
 Sep 7 2023, 08:01 AM
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Member  Group: Members Posts: 275 Joined: 29-July 12 From: Portland, the original! Member No.: 14,731 Region Association: North East States 
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After many years of sitting my 74 2.0 is now ready to rack up a few miles. Last weekend after having failed to get a proper dwell setting and seeing that my points looked pretty sorry, I installed a Hot Spark unit that I had bought years ago.
Now with fresh plugs, cap, rotor, "perfectly" timed distributer, cleaned injectors, a tested and functioning AAR and all new vac lines and hoses, TB gasket etc. My once very high cold idle is now nonexistent. Car will fire than die, then fire and catch surge ~ 500 RPM. Ambient these days is mid 70's here. When warm idle is also low ~700+- Since most threads are to cure high idle, I'm wondering what sensors CHT? etc are responsible for cold idle enrichment that I can check for proper functionality. My idle screw adjustment seems to have very little effect and is already "out >1.5 turns which seems high. (what are others seeing?) My ECU is set 1 click rich from factory mark but I'd think I should be closer in RPMs before I muck too much with that? Thx |
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Posts in this topic
87m491 primary imputs to high cold idle Sep 7 2023, 08:01 AM
ClayPerrine There are no real sensors for high idle on a D-Jet... Sep 7 2023, 12:23 PM rfinegan Confirm the start state of the AAR when it is beha... Sep 7 2023, 12:32 PM rjames surging? Does the MPS hold vacuum? Has it been ta... Sep 7 2023, 01:58 PM emerygt350 74 is not supposed to have the cht resistor.
Col... Sep 7 2023, 03:08 PM
87m491 I can't speak to if there was a mid year chang... Sep 7 2023, 05:49 PM TheCabinetmaker If it idles cold when you open the throttle, and i... Sep 7 2023, 03:15 PM 914_teener The cold start on the D-jet system is two fold and... Sep 7 2023, 03:50 PM rjames Note that the cyl head temp sensor should be on yo... Sep 7 2023, 06:05 PM emerygt350
Note that the cyl head temp sensor should be on y... Sep 7 2023, 06:38 PM brant Besides cleaning the AAR
Did you test it with 12v ... Sep 7 2023, 06:58 PM 87m491
Besides cleaning the AAR
Did you test it with 12v... Sep 9 2023, 10:34 AM rjames Does the MPS show signs of being opened? (Screws ... Sep 9 2023, 11:15 AM 87m491
Does the MPS show signs of being opened? (Screws... Sep 9 2023, 03:49 PM 87m491
Does the MPS show signs of being opened? (Screws... Sep 9 2023, 03:50 PM bobboinski I had the same problem. The timing was too far ret... Sep 9 2023, 12:16 PM rfinegan FOLLOWING..I have a 73 on the rack doing the same ... Sep 10 2023, 01:10 PM  |
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