Full Version: Engine Stumbles When Cold
73 2.0 stumbles when cold. Is worse at lower RPMs. Will not pull smoothly from 2000 RPM when cold. Does not like to stay running when first starting. These conditions improve as engine is warmed up. Any suggestions?
How does it idle when cold, RPM wise?
The idle when cold, once you get it running, seems OK.
What kind of rpm's are you seeing when the engine is cold?
About 900 RPM.
Simple answer:
Let it warm up before you drive it.
Let it warm up before you drive it.
PB Blaster the crap outta the AAR valve to free it up. Check that its opening up all the way and closed after 5 min or so after running the motor. Idle should be cold 1200-1800 rpms
R U running the right CHT? 017 # with a 270 ohm resistor inline with it. Otherwise its not going to idle right due to too lean a idle mix.
Get a tune up, all the right parts, valves adjusted, and then drive the car for 15-20 minutes so its hot. Then adjust the idle to 950rpm with the knob on the ECU about where the factory notch is and using the air bleed.
Now you are set up close to good and when it starts up cold it should idle at 1500 bout and then slowly go down to 950. There will be a period of light hunting until is fully warm.![shocked[1].gif](http://www.914world.com/bbs2/style_emoticons/default/shocked[1].gif)
R U running the right CHT? 017 # with a 270 ohm resistor inline with it. Otherwise its not going to idle right due to too lean a idle mix.
Get a tune up, all the right parts, valves adjusted, and then drive the car for 15-20 minutes so its hot. Then adjust the idle to 950rpm with the knob on the ECU about where the factory notch is and using the air bleed.
Now you are set up close to good and when it starts up cold it should idle at 1500 bout and then slowly go down to 950. There will be a period of light hunting until is fully warm.
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