Most likely a simple adjustment of the mixture screw will cure this. You need to find someone with a three gas analyzer who will do this for a reasonable price. I usually use the guys in the vans parked next to the emission test stations here in Washington and pay $20 or so. Antaki wrote: > > I have also heard of the cylinder wall cracking if run too long w/o coolant. > After all, they are just thin sleeves. This causes pressurization of the > cooling system in the same manner as does the leaking head seal problem. > > Now the question - my '88 fails smog check (CA)with too high HC at idle, but > does fine at 2500 RPM. But it also will rev up to 2000 RPM or higher on it's > own, usually when warm. Blipping the gas does not cure it. I believe the two > are related. > > The accelerator cable is not sticking, the O2 sensor is fairly fresh, I > opened and looked into the airflow meter, and it looks ok, and measures > within specs, resistively speaking. I believe the temp sensor (left front of > engine) is ok. I've checked all the grounds and electrical connections I can > find, and am considering doing brain surgery to it next. > > Ideas? > > Thanks, > > Ron Antaki -- Stuart MacMillan Manager, Case Program 800-909-8244 ext 208 Getting your share of the Net yet? http://www.cobaltgroup.com http://www.casedealer.com/demo http://www.caseihdealer.com/demo |
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