Runs for a Second and Dies, 1.8fi Starts, Runs for a Second, then Dies. |
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Runs for a Second and Dies, 1.8fi Starts, Runs for a Second, then Dies. |
CYCPYT |
Mar 25 2024, 07:42 AM
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#1
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Newbie Group: Members Posts: 16 Joined: 9-February 23 From: Culleoka Member No.: 27,149 Region Association: NineFourteenerVille |
Any advice on a forum article I should go to, or advice on how to troubleshoot this would be appreciated.
I have replaced the fuel filter and fuel pump, as I originally thought it was a fuel issue. Now I am not sure. Thank you! |
Frankvw |
Mar 27 2024, 08:22 AM
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#2
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working on my first 914 ! Group: Members Posts: 651 Joined: 13-April 16 From: Holland, the Netherlands Member No.: 19,896 Region Association: Europe |
my bet : CHT or the injectors do not get operated properly and stay closed, providing no fuel.
If your CSV plug is not connected in teh FI harness then forget the second part about the injectors, then it will also not run for 1 second (otherwise it will run with fuel provided from the CSV and dies after no geting new fuel from injectors) |
wonkipop |
Mar 27 2024, 02:06 PM
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#3
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Advanced Member Group: Members Posts: 4,350 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
my bet : CHT or the injectors do not get operated properly and stay closed, providing no fuel. If your CSV plug is not connected in teh FI harness then forget the second part about the injectors, then it will also not run for 1 second (otherwise it will run with fuel provided from the CSV and dies after no geting new fuel from injectors) yes the CHT could be it. and a few other things. (IMG:style_emoticons/default/biggrin.gif) thanks @CYCPYT for info about how problem surfaced. since it ran the day before and not the day after problem its likely a EFI harness issue (elec connection) or a failed EFI electrical component. stick up those photos of engine bay when you get time. lets have a look at the state of the engine bay. further question. where is the fuel pump? still in original location under the engine on passenger side inner long? reason i ask is to work out whether your L jet is still all intact. a lot of l jets or 914s have had their fuel pumps shifted up front under tank and the wiring to the pump changed (in the case of an L jet this is relevant). the L jet fuel pump if everything is original does not run with ignition on but engine not running. its an early safety feature that D jet did not have. with L jet the fuel pump runs when the starter is cranking - then when engine fires the flap in the AFM (air flow meter) is moved by intake air drawn in by engine and sends a signal to the ECU to keep the pump running. another component under the battery tray called the double relay is is involved. If any one of those things is not behaving correctly the fuel pump will not keep running and the engine will die after the initial hit from the cold start injector. how to test all this is laid out in the L jet manual i gave link to from Jeff Bowlsby's site. see if you can find the page in that which lays the tests out. its under the heading - engine starts but then dies. |
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