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What cause erratic idling before engine is fullly warmed-up?
Anyone has opinion what would cause the erratic idling before the engine reaches to a normal temperature? AFter the engine is fully warmed-up to normal temperature, the erratic idling is gone. The erratic idle only occurs during warm-up. I've heard something about oxygen sensor taking over (controlling) something after an engine fully warmed-up. |
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What cause erratic idling before engine is fullly warmed-up?
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#3
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What cause erratic idling before engine is fullly warmed-up?
What model and year of Honda we talking about here? How many
miles on it? What Curly said may solve the problem. I tend to urge doing a complete air purge, per the manual. One other possibility is a failing Idle Air Control Valve (or similarly named, e.g. EACV). That comes up here now and then. How old is your oxygen sensor, anyway? > wrote > Anyone has opinion what would cause the erratic idling > before the > engine reaches > to a normal temperature? AFter the engine is fully > warmed-up to normal > temperature, the erratic idling is gone. The erratic idle > only occurs > during warm-up. I've heard something about > oxygen sensor taking over (controlling) something after an > engine fully > warmed-up. > |
#4
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What cause erratic idling before engine is fullly warmed-up?
89 civic with 220K miles on it. I think my best guess I've found out it that the Coolant temperature sensor could be the problem. Where is the Coolant temp sensor in my car? The manual has no picture on it. what about Throttle Angle Sensor or Intake Air temperature sensor beside EACV? Is Curly saying that driving the car with turn the heater on would purge the air out? My oxygen senor is about 4 years old!. |
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What cause erratic idling before engine is fullly warmed-up?
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#6
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What cause erratic idling before engine is fullly warmed-up?
> wrote
> 89 civic with 220K miles on it. > > I think my best guess I've found out it that the Coolant > temperature > sensor > could be the problem. Where is the Coolant temp sensor in > my car? > The manual has no picture on it. Part #24 at http://www.hondaautomotiveparts.com/...SUB+CORD-CLAMP See also the drawing at http://media.honda.co.uk/car/owner/m...SH200/5-56.pdf Should be the same for your 89 Civic. > what about Throttle Angle Sensor or Intake Air > temperature sensor > beside EACV? The idle troubleshooting chart in my Chilton's manual for your 89 Civic says the coolant temperature sensor (a.k.a. "TW sensor") is the most likely cause. This chart appears in the free online manuals for your car at www.autozone.com , under "Emissions Controls." The Throttle angle Sensor and Intake Air Temp sensor may cause other problems not consistent with your symptoms (so far). It could be the TW sensor. I think that's come up here before and is in the newsgroup archives. I'd still do the air purge. I'd still keep the EACV in mind. These too have come up as the source of idle problems. Just not sure if they cause 'engine cold' idle problems. > Is Curly saying that driving the car with turn the heater > on would > purge the air out? > > My oxygen senor is about 4 years old!. Is it OEM? |
#7
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What cause erratic idling before engine is fullly warmed-up?
Elle wrote: > > wrote > > 89 civic with 220K miles on it. > > > > I think my best guess I've found out it that the Coolant > > temperature > > sensor > > could be the problem. Where is the Coolant temp sensor in > > my car? > > The manual has no picture on it. > > Part #24 at > http://www.hondaautomotiveparts.com/...SUB+CORD-CLAMP > > See also the drawing at > http://media.honda.co.uk/car/owner/m...SH200/5-56.pdf > > Should be the same for your 89 Civic. > Is TW sensor located under distributor? > > what about Throttle Angle Sensor or Intake Air > > temperature sensor > > beside EACV? > > The idle troubleshooting chart in my Chilton's manual for > your 89 Civic says the coolant temperature sensor (a.k.a. > "TW sensor") is the most likely cause. This chart appears in > the free online manuals for your car at www.autozone.com , > under "Emissions Controls." > > The Throttle angle Sensor and Intake Air Temp sensor may > cause other problems not consistent with your symptoms (so > far). > > It could be the TW sensor. I think that's come up here > before and is in the newsgroup archives. > > I'd still do the air purge. I'd still keep the EACV in mind. > These too have come up as the source of idle problems. Just > not sure if they cause 'engine cold' idle problems. > > > Is Curly saying that driving the car with turn the heater > > on would > > purge the air out? > > > > My oxygen senor is about 4 years old!. > > Is it OEM? Yes, it OEM. |
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What cause erratic idling before engine is fullly warmed-up?
> wrote
> Elle wrote: >> > wrote >> > 89 civic with 220K miles on it. >> > >> > I think my best guess I've found out it that the >> > Coolant >> > temperature >> > sensor >> > could be the problem. Where is the Coolant temp sensor >> > in >> > my car? >> > The manual has no picture on it. >> >> Part #24 at >> http://www.hondaautomotiveparts.com/...SUB+CORD-CLAMP >> >> See also the drawing at >> http://media.honda.co.uk/car/owner/m...SH200/5-56.pdf >> >> Should be the same for your 89 Civic. >> > > Is TW sensor located under distributor? Yes. It's called the "thermosensor" in the second link above. Are the links above not working for you for some reason? They are pretty clear about this sensor's location. >> > what about Throttle Angle Sensor or Intake Air >> > temperature sensor >> > beside EACV? >> >> The idle troubleshooting chart in my Chilton's manual for >> your 89 Civic says the coolant temperature sensor (a.k.a. >> "TW sensor") is the most likely cause. This chart appears >> in >> the free online manuals for your car at www.autozone.com >> , >> under "Emissions Controls." >> >> The Throttle angle Sensor and Intake Air Temp sensor may >> cause other problems not consistent with your symptoms >> (so >> far). >> >> It could be the TW sensor. I think that's come up here >> before and is in the newsgroup archives. >> >> I'd still do the air purge. I'd still keep the EACV in >> mind. >> These too have come up as the source of idle problems. >> Just >> not sure if they cause 'engine cold' idle problems. >> >> > Is Curly saying that driving the car with turn the >> > heater >> > on would >> > purge the air out? >> > >> > My oxygen senor is about 4 years old!. >> >> Is it OEM? > > Yes, it OEM. That's way too early for an oxygen sensor to fail, normally, then. |
#9
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What cause erratic idling before engine is fullly warmed-up?
I checked the ECU trouble code. I got code 16 which is a fuel injector system. I think the fuel injector system is contaminated. According to this -> http://media.honda.co.uk/car/owner/m...SH220/6-59.pdf rough idle and frequent stalling during warming are the sympton of faulty injection. I have to clean the fuel injection system. That is the only thing I can do. I can't afford to replace the whole injector system. |
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