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Car Forum / Honda Cars / March 20061994 Accord. Engine surging
94 Accord 2.0i. Engine is surging between 1000rpm and 2000rpm when stationary or the clutch is dipped when driving. Engine light has not come on and there appear to be no fault codes present. Otherwise, the car drives perfectly ok. Any suggestions? Failing lambda sensor perhaps? Please help....this is the mother in law's car and it would make my life much more peaceful as well as earning major brownie points with the wife!! Matt > 94 Accord 2.0i. Engine is surging between 1000rpm and 2000rpm when > stationary or the clutch is dipped when driving. Engine light has not [quoted text clipped - 8 lines] > > Matt Check the coolant level in the radiator with the engine cold. If it is low the sensors drive the ECU nuts and the idle hunts. If the level is low, you have a leak hunt ahead of you. The radiator is probably like the one in my daughter's '93; it has a flat spot on top where a brace crosses. Look for a crosswise hairline crack there where the flat spot flexes. Mike >> 94 Accord 2.0i. Engine is surging between 1000rpm and 2000rpm when >> stationary or the clutch is dipped when driving. Engine light has not [quoted text clipped - 16 lines] > > Mike Mike, Does this particular model also use an Idle Air Control Valve? Can a bad IACV also produce this same type of idle surge? Ron M. > "Michael Pardee" <michaeltnull@cybertrails.com> wrote >> "." <sailaway18@hotmail.co.uk> wrote in message [quoted text clipped - 30 lines] > Does this particular model also use an Idle Air Control > Valve? I am pretty sure it does, though it may be called an EAC valve on this model. > Can a bad IACV also produce this same type of idle surge? I agree that's possible. I concur with Mike's suggestion. In the same vein, do an air purge of the cooling system; a thorough one, where the radiator fan comes on twice (which may take 45 minutes of idling, so be patient). Also, the oxygen sensor is suspect, too, particularly if the problem only occurs after the car is warmed up. I had an earlier model Integra with a bad airflow regulator and it would display similar results, though it mainly happened when the engine was cold. The valve contained a "thermo-wax plunger" which had become deffective, resulting in differences of airflow into the injectors (or that's how it was described at least). As opposed to slowly closing proportional to engine temperature, it was erradic. . |
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