Continuity Test Results, Help to interpret Continuity Test Results |
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Continuity Test Results, Help to interpret Continuity Test Results |
MFejsa |
Jan 14 2022, 05:37 AM
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#1
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Newbie Group: Members Posts: 40 Joined: 25-April 20 From: Saudi Arabia Member No.: 24,178 Region Association: None |
Need help to interpret results of continuity test results (see attached) and explain what to do next to get my car running right.
Porsche 914 2.0L 1974 (I believe was originally a 1.7L) My car starts, runs and drives but idles rough and wont rev past 4,000rpm. It hesitates on acceleration. I have changed virtually all components / parts from rebuilt MPS, tested TPS and works, ignition switch, fuel pump, air & cylinder head temp sensor, swapped out ECU to one that was tested to work, and the list goes on. I am posting my continuity test results with the hope that some may have experienced or had the same results and knows what to look into more deeply or can diagnose. The test results concluded the following: 1. When testing the ECU power source from main power relay I could not get the 1V voltage difference from the voltage measured at the battery terminal. No difference and remained the same. Voltage at the battery was 12.79 throughout 2. when testing the voltage at start signal from ignition switch the voltage dropped to 9.7V and was not greater than 12V. However, should be greater than 12V. So, can anyone help, please. I haven't been able to get the car run and drive right since being restored and have run out of options. Regards Michael Attached thumbnail(s) |
emerygt350 |
Jan 14 2022, 09:16 AM
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#2
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Advanced Member Group: Members Posts: 2,087 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
The throttle body attachments were just to make sure you had the retard and advance going to the right port, but obviously that isn't an issue with the 123.
Sounds like you have everything covered, so this should be doable. I would verify you have the right injectors first, easy and free. What is your vacuum at idle? Since everything else sounds good and you are having idle and rev issues I might be inclined to look at your valve adjustment. |
emerygt350 |
Jan 14 2022, 09:18 AM
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#3
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Advanced Member Group: Members Posts: 2,087 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
The throttle body attachments were just to make sure you had the retard and advance going to the right port, but obviously that isn't an issue with the 123. Sounds like you have everything covered, so this should be doable. I would verify you have the right injectors first, easy and free. What is your vacuum at idle? Since everything else sounds good and you are having idle and rev issues I might be inclined to look at your valve adjustment. Although I guess you could still have the vacuum line going to the wrong port if you are running advance on your 123 and it is a 74. Some 74s have both vacuum and advance ports on the Throttle body. Make sure yours is hooked to the port closest to the distributor if you are doing advance. Is this a bluetooth 123 or the pot one? |
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