GSL-SE Pulsation Dampner test
05-15-14, 04:36 PM
#1
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GSL-SE Pulsation Dampner test
I got several GSL-SE pulsation dampners leftover from various projects etc. Is there some way to tell if they are good (off the car)?
I blow through the openining and some of them you can here the air come out (ruprtured diaphram??) and others you hear nothing.
Just trying to not store parts that are bad.
I blow through the openining and some of them you can here the air come out (ruprtured diaphram??) and others you hear nothing.
Just trying to not store parts that are bad.
05-16-14, 04:37 PM
#2
84SE-EGI helpy-helperton
The test you provided isn't quite as thorough as the FSM would have you test it, but if it's releasing air under pressure - it's likely to leak fuel under pressure.
The nature of a pulsation dampner (there are 2, one at the fuel rail and another at the pump) is that it's a spring-loaded metal diaphragm with rubber seals such that when the fuel pump runs, no harmonic waves are built within the fuel system which would result in varying fuel rail pressure at the injectors, i.e., a 'squirt-gun' spray pattern under load. There's no vacuum system or anything going to these, as it's a very simple setup designed to give the pressure wave somewhere to go instead of reflecting back into the system.
Know also that 2nd gen RX7 pulsation dampner's were prone to leaky and a number resulted in engine fires. The early 1st gen's never had that problem, but you would not catch me installing one in my car if I blew into it and I could hear air escaping!
Good luck, and they are not rebuildable, by the way.
The nature of a pulsation dampner (there are 2, one at the fuel rail and another at the pump) is that it's a spring-loaded metal diaphragm with rubber seals such that when the fuel pump runs, no harmonic waves are built within the fuel system which would result in varying fuel rail pressure at the injectors, i.e., a 'squirt-gun' spray pattern under load. There's no vacuum system or anything going to these, as it's a very simple setup designed to give the pressure wave somewhere to go instead of reflecting back into the system.
Know also that 2nd gen RX7 pulsation dampner's were prone to leaky and a number resulted in engine fires. The early 1st gen's never had that problem, but you would not catch me installing one in my car if I blew into it and I could hear air escaping!
Good luck, and they are not rebuildable, by the way.