D jet slow idle, Found this... |
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D jet slow idle, Found this... |
bobboinski |
Sep 24 2021, 06:11 PM
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#1
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Member Group: Members Posts: 198 Joined: 23-April 16 From: Petaluma Member No.: 19,929 Region Association: Northern California |
I have been fighting the D jet slow idle on my 1971 1.7. Have checked and rechecked everything. Bought a smoke machine. Bought a new timing light with advance. All new ignition parts. Checked MPS. Checked all sensors with ohm meter. Disassembled and cleaned Distributor. Good compression. So started disconnecting things. When i disconnected and plugged the vacuum retard I was able to adjust a 900 rpm idle with the (finally effective after removing vacuum retard) idle air bleed. So I did a search for "914 vacuum retard" and this link came up. Read the last post. Exactly fits my symptoms. I'm going to try what he describes tomorrow and see what happens. But I'm pretty sure I'm on the right track finally. Thoughts?
https://shoptalkforums.com/viewtopic.php?t=2513 |
bobboinski |
Sep 25 2021, 09:00 PM
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#2
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Member Group: Members Posts: 198 Joined: 23-April 16 From: Petaluma Member No.: 19,929 Region Association: Northern California |
I have eliminated all vacuum leaks, tested both sides of advance/retard canister with vacuum pump and everything moves as it should and no leak down from either side. The only vacuum leak this car has is a tiny wisp of smoke from the shaft in the throttle body. The engine pulls 15in of vacuum at idle of 850rpm measured at the vacuum retard port on the throttle body. I am pretty sure my problem is a mechanical one in the distributor at this point since I'm getting at least 30 degrees of centrifugal advance.
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