 Question for the L Jet Gang, If you could choose... |
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| djway |
 Apr 11 2020, 11:47 PM
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#1
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Senior Member  Group: Members Posts: 787 Joined: 16-October 15 From: Riverside Member No.: 19,266 Region Association: Southern California  |
OK L Jet people, if you could choose between an L Jet system that consisted of the 6 pin AFM and a 74 Brain or a 7 pin AFM and a 76 Brain which would you choose and why?
Discuss. (IMG:style_emoticons/default/smile.gif) |
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| djway |
Aug 22 2020, 12:22 AM
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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 |
Tracking down issue on why the motor won't start.
Does the pump always stay on? I know the yellow wire powers the pump during cranking then the AFM takes over when key released, but, does the pumps always remain on. I see nothing that would shut it off if it reached a certain pressure but I don't want to assume. The first time I turned the motor on it instantly fired which startled me and I shut it off. Tried again and got a short burst then nothing after that. Intermittently I could hear the pump run and sometimes nothing. Sometimes the starter would crank and other times nothing. The timing light said the wires were getting juice so I am pretty sure it is fuel delivery and probably more than one wire connection. I have a few wires I suspect may have been damaged with all the ins and outs I had to put the motor through getting things to fit in the Notchback. Hey, at least it didn't explode (IMG:style_emoticons/default/beer.gif) |
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| porschetub |
Aug 22 2020, 11:11 PM
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#3
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Advanced Member Group: Members Posts: 4,816 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(djway @ Aug 22 2020, 06:22 PM)  Tracking down issue on why the motor won't start. Does the pump always stay on? I know the yellow wire powers the pump during cranking then the AFM takes over when key released, but, does the pumps always remain on. I see nothing that would shut it off if it reached a certain pressure but I don't want to assume. The first time I turned the motor on it instantly fired which startled me and I shut it off. Tried again and got a short burst then nothing after that. Intermittently I could hear the pump run and sometimes nothing. Sometimes the starter would crank and other times nothing. The timing light said the wires were getting juice so I am pretty sure it is fuel delivery and probably more than one wire connection. I have a few wires I suspect may have been damaged with all the ins and outs I had to put the motor through getting things to fit in the Notchback. Hey, at least it didn't explode (IMG:style_emoticons/default/beer.gif) I'am getting my head around these systems as my experience is with later systems like Dijifant and Motronic,but my next build will be on a 914 96mm L-jet based on an early 1700 FI case so I'am schooling up. My understanding is upon cranking the AFM air gate moves and the pump starts in response to that and it only shuts of via the key in off position ?. I seem to remember someone saying the double relay system if wired wrong or wrong relay can cause the pump to constant run with the key on. I would look @ your ignition switch or the pump ,both don't last for ever. |
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Posts in this topic
djway Question for the L Jet Gang Apr 11 2020, 11:47 PM
ClayPerrine
OK L Jet people, if you could choose between an L... Apr 12 2020, 07:32 AM
djway
OK L Jet people, if you could choose between an ... Apr 12 2020, 03:47 PM r_towle Well, one has 6 pins and one has 7 pins
More is be... Apr 12 2020, 09:58 PM djway The seventh pin is a direct line to the temp senso... Apr 12 2020, 10:36 PM ejm
OK L Jet people, if you could choose between an L... Apr 13 2020, 05:13 AM ClayPerrine
OK L Jet people, if you could choose between an ... Apr 13 2020, 06:36 AM djway I believe I had/have multiple issues.
I replaced t... Aug 22 2020, 11:46 PM rbzymek
I believe I had/have multiple issues.
I replaced ... Aug 23 2020, 08:11 AM |
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