Jim Grant's Tech Tips
'92 Honda Accord, Rough Running at Cruise
Q:
I
have a problem that just cropped up on my 92 Honda Accord LX 2.2L
with 115k miles. The car doesnt do it when cold but when warmed
up if I accelerate very gently from 1500-3000 RPM it runs rough. If I
accelerate harder right up to full throttle it runs fine. It does this
in drive, reverse, and when power braked but not in neutral. I have changed
the transmission fluid (looks normal), cap, rotor, spark plugs. There
are no logged fault codes. Thanks in advance for any suggestions ........Tom
M.
A:
If
you are sure that the ignition system and fuel system is operating correctly
then I would be suspect of a defective emission control. The first control
Id check would be the EGR valve. If the EGR valve is operating incorrectly
or if there is restriction in the passages for the EGR valve it can cause
the type for driveabilty problems youre describing. The quickest
way to tell if the EGR system is the problem? Unplug it and drive the
vehicle. If the problems gone you then know what system needs service.
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