

| Subject: | Re: More questions on my '85 |
| Date: | Mon, 14 Nov 1994 17:16:11 -0800 |
Donald Baxter wonders: > When the engine is cold on this '85, the idle is about 900-1000 RPM. > When warmed up to normal operating temperature the idle increases to > 1400-1600 RPM. The van also seems to be getting not so good gas > mileage--not sure of the figures (and in fact, I don't know how much the > tank really holds) but in 90 miles of driving, I have used 1/2 tank > according to the fuel gauge. Don, 1400-1600 rpm is *WAY* too fast for idle! I'd suspect your idle enrichment is on all the time, or the mixture is mis-adjusted. There is a third, more illusive problem, which I saw on a Rabbit. The O2 Sensor is fail-deadly- on the waterpumper inline-four, a bad O2 sensor will drive the K-Jetronic system to full-rich, which will eventually cause the poor catalytic converter to melt, giving one a truely wierd set of symptoms to troubleshoot. BTW, any excessive enrichment will have some effect on the cat, if you have one- it tries to burn the extra gas. Bill
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