 75 2.0 runs amazing but won’t hold idle when hot, Help before heading back to the mechanic. |
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| Jett |
 Jul 22 2020, 08:16 AM
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#1
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Senior Member  Group: Members Posts: 1,639 Joined: 27-July 14 From: Seattle Member No.: 17,686 Region Association: Pacific Northwest 
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Hello our 75 2.0 is running well, starts right up when cold, but after a spirited 20 minute drive the car will not idle. I can start the car up without issue and drive as long as I don’t stop.
Any ideas? Thanks |
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| dr914@autoatlanta.com |
Jul 22 2020, 08:36 AM
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#2
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914 Guru Group: Members Posts: 7,866 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
closed points, leaking pressure sensor, stuck advance weights, idle screw not adjusted, head temperature sensor out of spec, fuel pressure too high, valves too tight,
QUOTE(Jett @ Jul 22 2020, 07:16 AM)  Hello our 75 2.0 is running well, starts right up when cold, but after a spirited 20 minute drive the car will not idle. I can start the car up without issue and drive as long as I don’t stop. Any ideas? Thanks |
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| Jett |
Jul 22 2020, 08:41 AM
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#3
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Senior Member Group: Members Posts: 1,639 Joined: 27-July 14 From: Seattle Member No.: 17,686 Region Association: Pacific Northwest
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QUOTE(dr914@autoatlanta.com @ Jul 22 2020, 07:36 AM) closed points, leaking pressure sensor, stuck advance weights, idle screw not adjusted, head temperature sensor out of spec, fuel pressure too high, valves too tight, QUOTE(Jett @ Jul 22 2020, 07:16 AM) Hello our 75 2.0 is running well, starts right up when cold, but after a spirited 20 minute drive the car will not idle. I can start the car up without issue and drive as long as I don’t stop. Any ideas? Thanks Thanks George. The points are good, valves were just adjusted, so they should be good. We did just restore the throttle body, so will check the idle screw. |
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| Bleyseng |
Jul 22 2020, 08:43 AM
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#4
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Idle speed is set when the engine is hot. So drive around and get the engine hot and then set the idle air bypass screw and the mix knob on the ECU. First check the points if they are in spec and not closed
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