 weird high idle with nearly empty tank |
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| dax1969 |
 Mar 3 2023, 07:42 AM
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#1
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Member  Group: Members Posts: 387 Joined: 10-March 14 From: belgium Member No.: 17,103 Region Association: None 
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Hi,
I have a 74 2.0 FI and car idles, after warming up, at a normal 850/900 rpm Yesterday however I had something weird ... In the morning (really cold outside) everything was normal (higher idle on start up, normal idle when warmed up) but on the way back the idle remained at 1200 rpm. I immediately thought vacuumleak. I needed gas as I was running very very low on fuel (warning light came on, never saw it before (IMG:style_emoticons/default/biggrin.gif) ) ... fyi, my tank is shiny and clean as I cleaned and coated the tank last year. After filling up the idle went back to normal... Drove the car again next day, same...all normal. Can low on fuel cause a higher idle ? weird cheers Dax |
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| emerygt350 |
Mar 3 2023, 10:40 AM
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#2
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Advanced Member Group: Members Posts: 2,882 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
I agree with Chris, it could be a lean condition from suction.
but that AAR is always a worthy suspect. Particularly if the fast idle just happened to match your cold fast idle. Although I would expect it to be higher since the engine is warm. |
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Posts in this topic
dax1969 weird high idle with nearly empty tank Mar 3 2023, 07:42 AM
Lockwodo I wouldn't think so, more likely a coincidence... Mar 3 2023, 09:08 AM Superhawk996 A theory:
An empty tank contains much more fuel... Mar 3 2023, 09:23 AM ChrisFoley There's a little partially crimped vent tube i... Mar 3 2023, 09:49 AM 76-914 AFAIK that is normal. While I've had my '7... Mar 3 2023, 10:44 AM emerygt350 That is really interesting! Now I have an exc... Mar 3 2023, 02:41 PM Lockwodo ..and a reason to keep a few gallons of gas in the... Mar 3 2023, 03:42 PM wonkipop just shows that a 914 can actually empty its tank ... Mar 3 2023, 05:02 PM ejm Most likely you had icing in the throttle body whi... Mar 3 2023, 05:05 PM
dax1969 Thank you all for the feedback... I'll keep an... Mar 7 2023, 04:54 AM |
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