[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index] Re: Newbee questions....
Joseph, >>>I'm new to the list and had a couple of questions. >>>1) Want to add gauges to my 83 QTC, and wondered if that is in the FAQ. >>> Specifically a temperature gauge, can I just tap off the existing temp >>>sensor? >> >>That's how the water temp gauge was added to my car. After putting up for >>years with requiring a bypass to avoid a 4000 rpm cutoff, I discovered that >>the temp sender tap was the problem. I disconnected the gauge from the >>sender, and it pulls better with no 4000 rpm problem. > >So are you saying I can go to the junk yard, pull a set of gauges off a >regular 4000, and connect them to existing sensors on my 83 QTC? That would >be wonderful! I was trying to say the opposite. You can, however, use the factory oil temp gauge from a 4000, mounted in the diff lock panel, with a factory oil temp sender in place of the oil pump plug. I also just heard that some Audis have a water temp sender in the fitting connecting the engine to the rad input hose. > >I too had the 4000 RPM problem. I was reading the service supplement, and I >only saw a reference to the airtemp sensor (in intake) and the idle switch >(on throttle body). As I recall, if the switch is shorted, or the airtemp >info is bad, it limits the RPM to 4000. They call this mode the boost test, >or such. I think it's sort of a limp-home mode to protect the engine if something isn't up to spec. I went through everything in the supplement, which actually includes at least 4 things that can cause the 4000 rpm cutoff. I even buzzed every wire going to the ecu, and measured every source for resistance. I have never seen the condition I found identified as a possible cause. >>I plan to use a tee (I know, I know - don't use tees with temp senders) on >>the back of the engine where you will find 2 other water temp senders. One >>is a thermotime switch; the other is the dual low temp/high temp switch. > >Are these temp senders, or thermal switches? Switches, I suppose. > >>If you can, use the abt panel which will accept 3 additional gauges. If >>not, there are several ways to add gauges to the diff lock switch panel. > >Any info on where I could get the abt panel and gauges? ---JCG None whatever. Richard Funnell, San Jose, California '83 urQ '87 560 SL
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