Hi guys, need to ask about my new El Camino 5 gen. The car itself starts wonderfully, idles nicely, after a while the rpm grows to 2000 and stays on this level very long. When I shift gear it falls to 1000 rpm and when on Neutral again 2000 and choke light turns on. It is Edelbrock carb and little cold weather here in Czech now... just need to know if it is okay. Thank you :-)
It is a little high but if the ambient temperature is very low it would be ok providing you understand that there will be a bit less economy. You can fine tune the choke to drop another notch on the accelerator cam so that it would idle at say 1500rpm and the gear engagement would be less harsh
Testimonial: "Thank you so much! So do you think just a good adjustment of the choke would help? No damaged pull-off or thermostate or fast-idle cam or something?"
btw the temp is not that low, like +3 degrees Celsius...
Thank you so much! So do you think just a good adjustment of the choke would help? No damaged pull-off or thermostate or fast-idle cam or something? Btw the temperature is not that low, like +3 degrees Celsius
on the end of the choke lever there should be a screw adjustment the will pick up on a notched cam controlled by the throttle butterfly arm. When cold and you press on the accelerator this cam spins to full position and is locked by the choke AS the engine warms up the control of the choke relaxex and the screw now picks up on a smaller step of the cam, and so on until the choke is wide open and the screw doesn't touch the cam at all. By lowering the tension of the choke ( adjustment by turnibg the bakelite cap under 3 screws and a ring then the coke picks up on a smaller step of the cam and so has lower idle rpms. You can get a good book for the carby operation from an after market spares shop or book store and it will explain in pictures how to adlust the auto choke settings
Man thank you very much, really helpful answer!!! :-)
Dear Bill - I had found out, that the engine temperature dont rise when warming (on control panel). So I guess the issue is faulty thermostate, do you agree?
sorry but on the information I have I would not blame the thermostat for the apparent slow engine warm up. Check the thermostat operation by simply starting the engine and timing how long it takes for the top hose to get warm IT sahould be around 5-10 minutes and you would feel the hose staring to get hot indicating the thermostat is opening and allowing hot engine water to circulate to the radiator.. I still believe the problem is in the choke setting of the carby. The auto choke operates by either getting hot air from the manifold (small pipes connected to the exhaust manifold) which is passed over a bi-metal coil connected to the choke butterfly and attached externally by a cam and lever system to the throttle. When cold the spring closes the choke against a cam . To activate the choke you have to tap the throttle and this allows the cam to act .The choke closes and the throttle is held slightly opened.. There is a screw adjustment on the cam to decide which step of the cam it will sit on and the length of time the choke stays on is determined by the spring tension on the bi-metal coil. There will be a adjustment on the coil be loosening of the cover and turnuing the cap. Wether hot air or electric operation of the bi-metalic coil the operation is still the same as is the adjustment. The control p[anel gets it's information from a sender unit or sensor and I would rather believe the hot hose as electronics are not terribly reliable as you know by having an overheat yet the gauge reads just above normal. The problem you have is in the choke setting and adjustment and how thw coil gats the heat to respond to rising engine temperature.
Well, today I spent some time working on setting the carb and trying to find the best position of coil. You were right, the past setting was too tight and didnt allowed butterly to fully open. I lowered the tension and the carb seems to work nicely now. After starting the cold engine it opens a little bit and within a short time it is fully opened, thats why I think it works correctly. I also checked and set the fast idle cam and idle of choke in accordance to Edelbrock manual...
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SOURCE: 1994 suzuki swift gti
My 1994 GTi was doing the same thing. The car should idle a bit fast when cold, say 1500rpm, due to the auto-choke. However, 2800rpm is too high. I had a look at my throttle system and could not workout how to adjust the auto-choke idle speed seperate from the normal idle. So I reluctantly had it serviced by the agents, they cleaned out the throttle body and adjusted it. It is better, 1900rpm, but still a bit high for my liking.
SOURCE: '99 chevy Silverado Z71,5.3 engine.....will not rev when hot.....
try replacing your EGR Valve, or your Oxygen Sensor
SOURCE: S10 has very high idle when cold and sticks to the gas when warm
you need to replace the throtle body controll sensor. Also you may want to make sure all your linkage from the pedal to the throtle body is cleaned and lubed correctly. While playing in this direct area. Your throtle body is only 4 bolts away. Why not get some carb cleaner and get to know your truck just a litle more.
If this is a carborator, then you need to turn my warmup idle down. there are 2 sets of idles on carborators. the one to warm up the engine, automatic choke or pin settings. Get a Chilton, find out which idles pin is for what. and play a litle bit.
I think you have a throtle body so I would also check the automatic air intake sensor. It could be going bad. Check your filter and make sure its clean.
hope all this helps.
tepfy
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Well, today I spent some time working on setting the carb and trying to find the best position of coil. You were right, the past setting was too tight and didnt allowed butterly to fully open. I lowered the tension and the carb seems to work nicely now. After starting the cold engine it opens a little bit and within a short time it is fully opened, thats why I think it works correctly. I also checked and set the fast idle cam and idle of choke in accordance to Edelbrock manual...
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