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Location:
Auckland, New Zealand
Registered:
July 2002
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4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 04:38
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Are they the same for the 4A-GZE and 4A-GE?
Talking about the Blue Top 4A-GE and AFM GZE
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Location:
Adelaide
Registered:
May 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 07:34
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Pulsation dampner?
I'm not sure what bit you're talking about.... Harmonic balancer mabey?
More info please.
Craig.
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Location:
Western Sydney
Registered:
May 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 10:38
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On the fuel rail? Fuel pulsation damper?
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Location:
Bundaberg, Qld.
Registered:
May 2002
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 Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 13:38
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 i would say that they would be the same, just the regulator as far as i can tell is different. i havnt even got mine (pulsation damper)on, i've been wondereing if i should put it on?? the red and black top ge, doesnt even have a pulsation damper, so it might not really be needed.??
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 20:08
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I thought you'd need the pulsation damper as it has that negative/ground? cable that goes from the pulsation damper to the intake manifold.
Oh, and the Pulsation Damper is the other thing that is in the Fuel Rail
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 21:40
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negative fround wire? mate you've got a wierd engine there! the only thing that has any type of wires going to it on my fuel rail, is......nothing. the only thing's that are on the fuel rail are: the regulator/the return line from it/vacum line from the vsv, the inlet line from the fuel filter (which the pulsation damper mounts on with) which does not have any wire what so ever (look at a manual), also you have the fuel line going to the cold start injector.
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Location:
Auckland, New Zealand
Registered:
July 2002
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 22:03
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mmmmmmmmm............
i'm not sure if that diagram is wrong or maybe it's just a completely different setup to any ge i've ever seen. the fuel reg is (on mine) the one that say's (on your diagram) the pulsation damper. and the pulsation damper (on mine) is what in the diagram says is the fuel reg.???!!!??
it must be wrong, as in that diagram it's fuel reg has no return line, which i bet is on the bottom side of the (so called) pulsation damper, there is the fuel return line. as the vsv is a vacum switch, it operates the fuel reg, not the pulsation damper.(and your diagram shows a vacum line to it).
oh, yeah the ze does have a cold start injector, it is mounted on the cast pipe after the intercooler b4 it goes into the inlet manifold.
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Pulsation Damper
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Wed, 04 September 2002 22:53
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That pic is for a RWD 4A-GE, and I'm pretty sure that its labelled wrong for that motor anyway 
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: 4A-G/GZ Pulsation Damper
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Thu, 05 September 2002 11:49
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the gze has a pulse dampener and a pressure reg. i would imagine the dampener is for when the throttle is snapped closed the dampener smoothes the loading on the pressure reg and the fuel pump or to stop a chance of a fuel line splitting or for economy as it would help to keep a even spray pattern, take your pick. either way you can run without it fine. ive yet to see a race car with one but then again i havent seen every race car.
mick
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Location:
Canberra
Registered:
May 2002
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Re: 4A-G/GZ Pulsation Damper
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Thu, 05 September 2002 12:58
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It is my understanding that a pulse damper on a fuel rail feed is placed there to attempt to maintain a constant pressure in the rail to ensure accurate fuel delivery. It is particularly important on an EFI system where all injectors are fired simultaneously (rather than sequentially), as the sudden surge of fuel leaving the rail will momentarily drop the rail pressure before the injectors close again. In reality this all happens so fast that you may not be able to measure a difference, but as a realtime test, squeeze the rubber fuel line just before the pulsation damper with your fingers, and see if you can feel the fuel pulsing in the hose as the injectors open and close.
What i've always wondered is why it is often recommended to upgrade fuel line diameter to increase fuel flow, when the damper itself 'looks' to be a huge restriction in its design?!?
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