 Screwy electrical thing, Even the clock gets involved |
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| Porschef |
 Jul 11 2015, 07:54 AM
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#1
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How you doin'  Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States 
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Haven't spent any real time trying to figure this one out but there is something a little strange going on. I try to drive the car at least once during the week to work, it's a little over 80 miles. After a little while, I'll notice the oil pressure gauge and the temp gauge (both VDO in the console) jump a little higher, then drop back down, then repeat a couple times, then I'm not paying attention, then it does it again, and so on.
Now the strange part, I'll shut it down, and the clock, which has been keeping perfect time all week while parked, has stopped, and I'll need to reset it. I went out this morning, and it's keeping perfect time again. Other than that, there are no affects on the way the engine runs, i.e.. No hesitation, bucking, etc. No starting problems after sitting a few days. Any ideas? (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/alien_2.gif) (IMG:style_emoticons/default/smoke.gif) |
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| cantley914 |
Jul 11 2015, 08:19 AM
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#2
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Pipeline surgeon Group: Members Posts: 306 Joined: 15-June 04 From: Cantley, Qc Canada Member No.: 2,210 |
QUOTE(Porschef @ Jul 11 2015, 05:54 AM)  Haven't spent any real time trying to figure this one out but there is something a little strange going on. I try to drive the car at least once during the week to work, it's a little over 80 miles. After a little while, I'll notice the oil pressure gauge and the temp gauge (both VDO in the console) jump a little higher, then drop back down, then repeat a couple times, then I'm not paying attention, then it does it again, and so on. Now the strange part, I'll shut it down, and the clock, which has been keeping perfect time all week while parked, has stopped, and I'll need to reset it. I went out this morning, and it's keeping perfect time again. Other than that, there are no affects on the way the engine runs, i.e.. No hesitation, bucking, etc. No starting problems after sitting a few days. Any ideas? (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/alien_2.gif) (IMG:style_emoticons/default/smoke.gif) Sounds like a bad ground connection to me. |
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| Valy |
Jul 11 2015, 08:57 AM
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#3
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Senior Member Group: Members Posts: 1,675 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
You have voltage drops on the clock and other gauges. You either have a bad ground or a heavy consumers on the same supply that is active only when the car runs. The radio would be a good one to check.
Do you have any add-ons or funny electrical wires running through your fuse box? Check the battery terminals as well. |
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| thieuster |
Jul 11 2015, 09:33 AM
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#4
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Member Group: Members Posts: 447 Joined: 31-January 15 From: 275 mls NW from Stuttgart. Member No.: 18,384 Region Association: Europe |
QUOTE(Porschef @ Jul 11 2015, 03:54 PM) Haven't spent any real time trying to figure this one out but there is something a little strange going on. I try to drive the car at least once during the week to work, it's a little over 80 miles. After a little while, I'll notice the oil pressure gauge and the temp gauge (both VDO in the console) jump a little higher, then drop back down, then repeat a couple times, then I'm not paying attention, then it does it again, and so on. Now the strange part, I'll shut it down, and the clock, which has been keeping perfect time all week while parked, has stopped, and I'll need to reset it. I went out this morning, and it's keeping perfect time again. Other than that, there are no affects on the way the engine runs, i.e.. No hesitation, bucking, etc. No starting problems after sitting a few days. Any ideas? (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/alien_2.gif) (IMG:style_emoticons/default/smoke.gif) Check to voltage regulator! I had the same problem with one of my British classics. A new regulator cured the problem. Menno |
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| Spoke |
Jul 11 2015, 10:18 AM
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#5
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(cantley914 @ Jul 11 2015, 10:19 AM) Sounds like a bad ground connection to me. (IMG:style_emoticons/default/agree.gif) That all 3 gauges have issues points to a common ground or power fault. |
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| Porschef |
Jul 11 2015, 10:50 AM
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#6
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How you doin' Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States
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Thanks for the replies.
I'll check the grounds, thats the easiest. Radio and amps are on dedicated lines. Then I'll try Menno's suggestion and swap the regulator. Joe |
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