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Car Forum / Honda Cars / March 200792 Accord Running HOT? Also sometimes IDLE BOUNCE... Thermostat??
Hi I have a 92 accord, 285,000 KM on it. Just yesterday I noticed the smell of anti-freeze... soon later after driving and coming to a stop I seen anti-freeze steam rising from the hood.. I also noticed that when the car sits at idle the temp needle rises above the H line.... but as soon as I drive it goes back to normal. Today I started my car and after about 5 minutes once warmed up (its like -10 here now) the idle was bouncing from 800-2000 over and over.... once I put in drive it went back to normal. The temp needle was also rising above the H line... I started driving and everything seems fine but the needle seems to lower and rise above the H line.... after 20 minutes or so I came home and just let the car idle, there was no longer an idle jump from 800-2000..... Im confused.... could this be a temperature coolant sensor? or could it be my thermostat? any help would be greatly appreciated! -one other thing... since i bought the car this summer when I shut the car off sometimes the fan kicks in. > Hi > [quoted text clipped - 19 lines] > -one other thing... since i bought the car this summer when I shut the > car off sometimes the fan kicks in. ================================= Cooling fan switches don't work if they are not immersed in coolant, so top up the rad and fill the reservoir to the -MAX- mark, and add some more the next time the engine is cool. You'll see the level has dropped as the engine purges some air from the system and 'sips' it from the reservoir. Owner's manuals are often available from wrecking yards for about 1/3rd of the dealer price. 'Curly' Today I drove it around looking for a thermostat at some auto part stores around here... not one place has a thermostat for my car... but anyways, while driving... after maybe an hour of stop and go... the check engine light came on, and the car started to lose power... the temp was also above the H line.... one more thing is I lost the heat in my car today.... Im starting to think this is a coolant temp sensor, and maybe a thermostat too because of the sudden heat loss.... What are your thoughts? I would also like to add that for about 20 minutes the cars idle was jumping from 1000-2200 rpm. Its done that yesterday and today once the car got warm. "85miles" <85miles@gmail.com> wrote in news:1172558786.375033.266670 @q2g2000cwa.googlegroups.com: > I would also like to add that for about 20 minutes the cars idle was > jumping from 1000-2200 rpm. Its done that yesterday and today once > the car got warm. Bouncing idle is usually a big air leak. With car full-warm and idle bouncing, remove air cleaner pipe from throttle body. Cover LOWER port in the throttle body with your finger. Does bouncing stop? Then Fast Idle Thermo Valve is stuck open.  SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ "85miles" <85miles@gmail.com> wrote in news:1172558532.279506.185210 @k78g2000cwa.googlegroups.com: > Today I drove it around looking for a thermostat at some auto part > stores around here... not one place has a thermostat for my car... Don't use an aftermarket thermostat. That's asking for even more trouble. Use a dealer thermostat only. It's about $30. > but > anyways, while driving... after maybe an hour of stop and go... the > check engine light came on, Get the code behind the light and report it here. http://www.tegger.com/hondafaq/misc/3173_ICCR_E_14JAN03.pdf (specifically page 15) > and the car started to lose power... the > temp was also above the H line.... one more thing is I lost the heat > in my car today.... > > Im starting to think this is a coolant temp sensor, and maybe a > thermostat too because of the sudden heat loss.... Replace thermostat and rad cap. With OEM only! SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > > Im starting to think this is a coolant temp sensor, and maybe a > >thermostat too because of the sudden heat loss.... > > Replace thermostat and rad cap. With OEM only! Why the rad cap too? >> > Im starting to think this is a coolant temp sensor, and maybe a >> >thermostat too because of the sudden heat loss.... >> >> Replace thermostat and rad cap. With OEM only! > > Why the rad cap too? Because Rad Caps go bad, and when they do they allow the coolant to boil, forcing it to the reservoir, and then to the ground. Not a good thing. Should probably be replaced every few years as a matter of PM. Joe LaVigne <jlavigne@hits-buffalo.com> wrote in news:54l06kF21871vU6 @mid.individual.net: >>> > Im starting to think this is a coolant temp sensor, and maybe a >>> >thermostat too because of the sudden heat loss.... [quoted text clipped - 4 lines] > > Because Rad Caps go bad, Specifically the vrious seals. > and when they do they allow the coolant to boil, > forcing it to the reservoir, and then to the ground. Not a good thing. > Should probably be replaced every few years as a matter of PM. 100% correct. A bad rad cap can sometimes be misdiagnosed as a blown head gasket. SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > Joe LaVigne <jlavi...@hits-buffalo.com> wrote in news:54l06kF21871vU6 > @mid.individual.net: [quoted text clipped - 21 lines] > > The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/ OK I just got off the phone with a local garage... they tell me my rad is gone... they said what happen was it was low on coolant and thats why the car ran hot and I had no heat... but I did top it up the first thing that day... and it still ran hot. For some reason I don't think it is my rad, because its not leaking or anything. And I mean that doesn't explain my idle bouncing and it makes more sense to me that my thermostat is gone.... considering one day I had heat, the car would only get hot when it was idling, driving it would cool down... then the next day I had NO heat, the car was running hot for the hour or so i drove it, with no heat.... I'm thinking the thermostat was stuck closed or open. Do you think my rad is really no good? or could it still be a thermostat? > OK I just got off the phone with a local garage... they tell me my rad > is gone... they said what happen was it was low on coolant and thats [quoted text clipped - 11 lines] > Do you think my rad is really no good? or could it still be a > thermostat? Rads "go bad" in one of three ways: 1) Fins corrode and fall off, 2) core gets plugged with crud from neglect or wrong antifreeze, 3) tanks crack and leak. If your garage can't identify these, you need a new garage. Bouncing idle is an air leak or low coolant. If you have ascertained the rad level is right up to the top, then the problem is most likely the Fast Idle Thermo Valve having stuck open. This usually happens when cooling systems are neglected. Poor heater output combined with overheating at idle (fans working) means your coolant circulation is poor. This is usually caused by low coolant. If the coolant repeatedly gets low in spite of your attempts at topping it up, then you have possible: 1) blown head gasket, 2) bad rad cap, 3) failed connection between rad cap and overflow reservoir, 4) corroded water pump 5) external water leak. You need a competent garage to look at this thing. Your problem should be solvable in a half-hour. SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > > OK I just got off the phone with a local garage... they tell me my rad > > is gone... they said what happen was it was low on coolant and thats [quoted text clipped - 43 lines] > > The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/ Well thanks Tegger your great help... Im going to take the car to another garage, I have an unkle that works there. Maybe he will have some better advice for me then the previous garage. > Hi > [quoted text clipped - 19 lines] > -one other thing... since i bought the car this summer when I shut the > car off sometimes the fan kicks in. I would check or replace the thermostat. sounds like it might be stuck closed so hot coolant is only circulating in the engine bypassing the radiator. |
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