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914World.com _ 914World Garage _ Fuel issue.
Posted by: Tjmrfe Aug 29 2021, 03:03 PM
Hey all,
So, my motor is (75’ 1.8 stock EFI) back in the car, with assistance from a very helpful 914 world member! (thank you again Rory) and it won’t start…first I figure I’ll check the basic stuff, fuel? my pump doesn’t make any noise…so I Put my meter on the pump leads, while turning key, and I opened flap on intake… I get 9vdc….so next I go to pin 88d- 9vdc. At pin 86 I’m getting 9vdc….at pin 88y I’m getting 12vdc…soooooo,
Took my battery to the pump, + to + and - to - my pump works just fine….
But somehow I’m loosing 2 Volts along the way? Any one else had something like this? Doesn’t seem to make sense, I’m getting a voltage drop? Is there another stop along the way that the pump feed would loose that 2 volts?
thanks as always.
Posted by: Tjmrfe Aug 31 2021, 01:51 PM
QUOTE(Tjmrfe @ Aug 29 2021, 01:03 PM) 
Hey all,
So, my motor is (75’ 1.8 stock EFI) back in the car, with assistance from a very helpful 914 world member! (thank you again Rory) and it won’t start…first I figure I’ll check the basic stuff, fuel? my pump doesn’t make any noise…so I Put my meter on the pump leads, while turning key, and I opened flap on intake… I get 9vdc….so next I go to pin 88d- 9vdc. At pin 86 I’m getting 9vdc….at pin 88y I’m getting 12vdc…soooooo,
Took my battery to the pump, + to + and - to - my pump works just fine….
But somehow I’m loosing 2 Volts along the way? Any one else had something like this? Doesn’t seem to make sense, I’m getting a voltage drop? Is there another stop along the way that the pump feed would loose that 2 volts?
thanks as always.
Posted by: jrmdir Aug 31 2021, 02:34 PM
QUOTE(Tjmrfe @ Aug 31 2021, 03:51 PM)
QUOTE(Tjmrfe @ Aug 29 2021, 01:03 PM)
Hey all,
So, my motor is (75’ 1.8 stock EFI) back in the car, with assistance from a very helpful 914 world member! (thank you again Rory) and it won’t start…first I figure I’ll check the basic stuff, fuel? my pump doesn’t make any noise…so I Put my meter on the pump leads, while turning key, and I opened flap on intake… I get 9vdc….so next I go to pin 88d- 9vdc. At pin 86 I’m getting 9vdc….at pin 88y I’m getting 12vdc…soooooo,
Took my battery to the pump, + to + and - to - my pump works just fine….
But somehow I’m loosing 2 Volts along the way? Any one else had something like this? Doesn’t seem to make sense, I’m getting a voltage drop? Is there another stop along the way that the pump feed would loose that 2 volts?
thanks as always.
Did you try swapping out the relay with one of the others to see if anything changes?
Ron
EDIT: Swapping the usual relays doesn't apply to 1.8 I guess. See this post and check out the "dual relay" http://forums.pelicanparts.com/porsche-914-914-6-technical-forum/789400-914-wont-start-no-power-fuel-pump.html
Posted by: Tjmrfe Aug 31 2021, 04:51 PM
QUOTE(jrmdir @ Aug 31 2021, 12:34 PM)
QUOTE(Tjmrfe @ Aug 31 2021, 03:51 PM)
QUOTE(Tjmrfe @ Aug 29 2021, 01:03 PM)
Hey all,
So, my motor is (75’ 1.8 stock EFI) back in the car, with assistance from a very helpful 914 world member! (thank you again Rory) and it won’t start…first I figure I’ll check the basic stuff, fuel? my pump doesn’t make any noise…so I Put my meter on the pump leads, while turning key, and I opened flap on intake… I get 9vdc….so next I go to pin 88d- 9vdc. At pin 86 I’m getting 9vdc….at pin 88y I’m getting 12vdc…soooooo,
Took my battery to the pump, + to + and - to - my pump works just fine….
But somehow I’m loosing 2 Volts along the way? Any one else had something like this? Doesn’t seem to make sense, I’m getting a voltage drop? Is there another stop along the way that the pump feed would loose that 2 volts?
thanks as always.
Did you try swapping out the relay with one of the others to see if anything changes?
No I but I do have another dual relay, I’ll give that a shot,
Thanks…
Ron
EDIT: Swapping the usual relays doesn't apply to 1.8 I guess. See this post and check out the "dual relay" http://forums.pelicanparts.com/porsche-914-914-6-technical-forum/789400-914-wont-start-no-power-fuel-pump.html
Posted by: Tjmrfe Aug 31 2021, 07:12 PM
QUOTE(Tjmrfe @ Aug 31 2021, 02:51 PM)
QUOTE(jrmdir @ Aug 31 2021, 12:34 PM)
QUOTE(Tjmrfe @ Aug 31 2021, 03:51 PM)
QUOTE(Tjmrfe @ Aug 29 2021, 01:03 PM)
Hey all,
So, my motor is (75’ 1.8 stock EFI) back in the car, with assistance from a very helpful 914 world member! (thank you again Rory) and it won’t start…first I figure I’ll check the basic stuff, fuel? my pump doesn’t make any noise…so I Put my meter on the pump leads, while turning key, and I opened flap on intake… I get 9vdc….so next I go to pin 88d- 9vdc. At pin 86 I’m getting 9vdc….at pin 88y I’m getting 12vdc…soooooo,
Took my battery to the pump, + to + and - to - my pump works just fine….
But somehow I’m loosing 2 Volts along the way? Any one else had something like this? Doesn’t seem to make sense, I’m getting a voltage drop? Is there another stop along the way that the pump feed would loose that 2 volts?
thanks as always.
Did you try swapping out the relay with one of the others to see if anything changes?
No I but I do have another dual relay, I’ll give that a shot,
Thanks…
Ron
EDIT: Swapping the usual relays doesn't apply to 1.8 I guess. See this post and check out the "dual relay" http://forums.pelicanparts.com/porsche-914-914-6-technical-forum/789400-914-wont-start-no-power-fuel-pump.html
Thank you, turned out that Pelican article helped, the dual really was the fault, it had been an old one.
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