Is it the fule pump?, Spluttering and stalling! |
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Is it the fule pump?, Spluttering and stalling! |
chrispovoas |
Apr 8 2023, 04:00 AM
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#1
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Member Group: Members Posts: 61 Joined: 8-April 23 From: New Zealand Member No.: 27,285 Region Association: Australia and New Zealand |
Hi guys, Chris from New Zealand here....finally bought myself a 914! Shes a '73 2.0 with original FI. Had her about a week, after standing for 8 years.
Previous owner spent some time and money getting her on the road as part of the sale to me, but still a bit of work to be done! I'll try and attach a picture. Took her for a shakedown run today for about 3 hours but then she started coughing and spluttering then stalled at about 60mph. Coasted to a halt, ignition on/off and away she went again for about half an hour.. Same thing again, ignition on/off and all was well for another 20 min.. This went on and on and the intervals between spluttering and stalling got more frequent until i just about made it home. Felt like fuel rather than electrical... Could it be the fuel pump, or any other ideas? I have a feeling I'll be using the forum quite a bit (IMG:style_emoticons/default/smile.gif) Nice to meet everyone! |
emerygt350 |
Apr 8 2023, 10:14 PM
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#2
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Advanced Member Group: Members Posts: 2,149 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
At cold start (20 c) it should jump up to 12-1400 rpm. As it warms it will rise to 1400 but shouldn't go higher. That is the aux air valve. As the filament in the aav heats it will bring the idle down. As the heads heat the sensor the ECU uses to enrich the air fuel ratio will eventually tell the ECU to knock it off. At this point the idle should be about 850. This can take a long long time in cold temps. Temps less than 20c.
The system the type 4 uses to control airflow over the oil cooler and heads is really interesting and important. Besides insuring that you are not running lean, you need to make sure that is working as intended. Do you have a Chilton's or clymers manual? |
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