Engine misses when idling at 800 RPM when warmed up
Okay, I have a little 1993 Honda Civic si Hatchback (sorry they don't have it on the product list) and when it warms up the RPM's go down to 800, but it'll miss and the tac will go up, then down, then back up, and low again, can't I fix this?
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Re: Engine misses when idling at 800 RPM when warmed up
The idler air control is not working like it should. try tapping on it with a screw driver lightly this should kinda fix the problem while u are tapping. This will need to be replaced if it starts agian after u stop tapping.
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" Hunting" is usually indicative of a faulty temp sensor or air flow meter telling lies to your computer. It can also be vacuum leaks, however these are usually apparent even when cold. Male sure you don't have any air locks in your cooling system.
I had the same problem with my honda. On the throttle body there is a screw that controls idle speed. If your idle speed is around 800-1000 rpm in neutral, tighten the screw a quarter turn each try until the idle speed is around 1500 RPM. Did this stop the idle?
The person that told u that it was the tps and idle air they we're completely right!! The tps sensor is what makes it do that. If you pull the air intake of there's 2 holes on the throttle body. Plug one of the off with your finger while the engine is idling high and it should come down mine was the top hole. If it does go down just get a new tps sensor. and the back sensor on the intake to be safe. or the ghetto way is to plug the hole off, not my sugestion.
Sounds like it may be a vacuum line problem...double check all the hoses and make sure none are off or broken/missing. Check over the IAC (Idle Air Control) valve too and inspect & clean it out with carb clean or something, could be that the valve's sticking
dude its normal for first start or cold start that the idle is ok but it must high than normal... its normal because the engine is warming up it self... when it gets warm, the idle speed will return normal idle... your engine is 1200cc, it has not much HP for a great load... and i know its a carburatored engine and its an old engine, your head lyt and a/c fan and aux fan and all the electrical system on your car, uses the HP of you engine and its a lot of load to the alternator driven by the engine to generate an electricity they need and thats why the engine rpm speed lowering down to dead and its shake. thats why when you use your lyts or all electrical, you engine is weakening... the best remede is adjusting you idle speed... its located behind the carburator.. its a small black knob.. just make a twist each eighter way and you'll find out if your idle rpm speed ts incresing or decresing.. just increase it and try opening your lyts and other electrical, if its still shaking then adjust it a little more