Electrical circuit for AAR, Where does it trace back to? |
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Electrical circuit for AAR, Where does it trace back to? |
boxsterfan |
Nov 20 2013, 09:10 PM
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#1
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
So, I have been having what I thought was the problem of a stuck-open AAR.
1. Start car cold 2. Car idles at 1800 RPM during warm-up 3. Car gets warmed up and now starts idling at 3,000 RPM 4. Pull input to AAR and you can feel it is still sucking air in (a ton). 5. Plug the input to AAR and idle drops to 950 RPM. Today, I replaced the AAR (thanks fellow 914world member) with another one. However, the problem/symptom persists just as above. So now I suspect I am not getting power to the AAR so that its little bimetallic strip can be heated up. Where does the power wire for the AAR trace back to in the car (74 2.0L)? How can I test that wire? |
boxsterfan |
Nov 23 2013, 10:36 PM
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#2
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
Well, I was able to get my AAR working properly today. First, I was not getting 12V to the AAR. Looking at the relay box in the engine, I took out all the relays and one of the m (fuel injection power one) had the "blue-ish" powder-like/gooey-like substance all over it like you see on a battery cable. Cleaned that out as good as I could today but still no luck.
But then...I remember that I had recently put in a VDO oil temp gauge and had stolen the ground wire from the clock in the center console. My clock had been working sporadically after I had jerry-rigged a quick ground wire (well, what I thought was ground "enough"). I ended up daisy chaining the original ground that went to the clock with the VDO oil temp gauge and presto!! Thanks for all your help. |
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