 L-Jet not idling when HOT, Doesn't like 32C / 90F outside temps |
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| nihil44 |
 Feb 15 2018, 01:17 AM
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#1
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Member  Group: Members Posts: 157 Joined: 28-January 12 From: Brisbane, Australia Member No.: 14,058 Region Association: None 
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My '74 1.8 normally runs beautifully but with our present 90 degree F ambient temps it runs hot and won't idle.
Temp gauge is just short of the red zone. (Next time I will get NHS to put numbers on the gauges.) Thermostat works - checked with hot air gun. Flaps are opening Warm air guides installed Tried enriching idle mixture by screwing in air bypass screw to max - no effect Would appreciate help from the brains trust Thanks David Brisbane, Australia |
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| djway |
Feb 15 2018, 02:25 PM
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#2
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Senior Member Group: Members Posts: 787 Joined: 16-October 15 From: Riverside Member No.: 19,266 Region Association: Southern California |
In the AFM box there is an air density/temp sensor that looks like a little cone. The metal contacts in there can get corroded which changes the resistance and throws the mixture off. When temps increase the resistance problem increases.
I fully agree that all the other things should be carefully checked but this is an item often overlooked. good luck |
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Posts in this topic
nihil44 L-Jet not idling when HOT Feb 15 2018, 01:17 AM
falcor75 Check that your fuel pressure still is ok, if the ... Feb 15 2018, 02:21 AM malcolm2 I assume you are talking about oil temp. I also a... Feb 15 2018, 07:51 AM nihil44 I haven't checked fuel pressure but I have rel... Feb 15 2018, 02:14 PM nihil44 Thanks djway,
That diagnosis fits the scenario be... Feb 15 2018, 03:50 PM nihil44 Got an old AFM and looked inside but couldn't ... Feb 15 2018, 06:33 PM
nihil44 Temp Gauge Feb 15 2018, 06:35 PM
djway
Got an old AFM and looked inside but couldn't... Feb 15 2018, 10:16 PM nihil44 Got it.
Thanks
Will check on the car.
I am a lit... Feb 16 2018, 12:27 AM djway
Got it.
Thanks
Will check on the car.
I am a li... Feb 16 2018, 01:27 AM Valy Please check that the auxiliary air valve closes w... Feb 16 2018, 01:31 AM nihil44 Looks like it's fixed
A very talented friend ... Feb 17 2018, 01:07 AM |
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