98 honda civic stalling when i stop??

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car has 200,000 miles on it and runs fine, but when i come to a red light and have to stop it acts like it wants to die or stall. any ideas on what this could be??
 
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The IAC (Idle Air Control) valve is probably very clogged up with grime. You will have to remove it and use a flat edge screwdriver to clean the wire mesh screen that is all clogged up. I would also remove the throtle body and clean it with a rag as it also tends to build up grime as the miles add up. Same thing happened to our 1998 Civic.
 
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 Originally Posted By: LT4 Vette
The IAC (Idle Air Control) valve is probably very clogged up with grime. You will have to remove it and use a flat edge screwdriver to clean the wire mesh screen that is all clogged up. I would also remove the throtle body and clean it with a rag as it also tends to build up grime as the miles add up. Same thing happened to our 1998 Civic.
+1 This would be my sugguestion. Also when was the last time you did a tune up with plugs/wires and an air filter? What about the condition of the PCV? These are other things to check other than LT4 Vette's advice.
 
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And what StevieC said, if it still has the original PCV valve, its a good idea to get a new one.
 
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Bill in Utah

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Getting a check engine light? It should be throwing a code. Scan the ECU and see what it *hopefully* is saying that would be a good start.
 
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I know it's OBD-II I just don't know if the computers were that sophisticated back in '98 that it would know if the IAC was out of range or carboned up. I don't know Honda that well, that's why I said might...
 
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Could be a bad O2 sensor as well, my friend's Civic threw a CEL and I pulled a P0135 DTC from it, meaning the bank 1 sensor 1 had a bad heater. Same stalling symptoms too.
 
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These Civics are ULTRA reliable with basic maintenance. Our old 1998 Civic is approaching 250K miles (nephew now drives it) and the only problem the car ever had was a cracked exhaust mainfold ($85) at 160K miles and I installed a new Denso O2 sensor due to the mileage. Other than that, everything is still original on the car except maintenance items and the TBelt & WP. BTW, if your car stalls (which out Civic did) and you scan the OBD for codes, it will not show any if your IAC is clogged.
 
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All vacuum lines and connections must be perfect, including the intake. Check and repair as necessary. The PCV system is critical - trace it and check all of it. Clean the throttle body bore and plate really clean with solvent and a rag. All this is easy to do, just a bit of time. If she still has problems, clean the idle air motor valve. Be careful with strong solvents on the valve.
 
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