bad/leaking fuel injectors?
 

ok, i just picked up an 88 gxl from SC, it had low compression on the front rotor and the owner couldn't be troubled to fix or diag it. At the time i thought it just had blown apex seals and that i would be dropping a jdm in, in a few months, heres the problem though, i drove the car 500 miles!!! its definatly not blown apex seals as we all know how bad the car is when the apex seals go. after my arrival home i set to work to try and solve the puzzle of this gxl, here is what i knew.

when driving there is a constant smell of fuel (this is where the thoughts of leaking injectors came in), the car was completely unable to idle (have partially fixed this problem with idle screw), when spark plugs where looked at we found that the front rotor's plugs where covered in what looks like unburnt fuel and oil (after a very electrifing test, we found that the plug wires are all sending charge, by the way when testing plug wires dont leave your other hand on the frame of the car). we replaced all four spark plugs and decided not to do a transmission fluid treatment to the rotor housing, there was a very marginal gain in power, however one was noticed, and the constant smell of fuel has not dissipated in the least. this leads us to questioning the fuel system.

to skip to, i found a pair of injectors on ebay, tell me what you guys think, http://cgi.ebay.com/ebaymotors/RC-Fu...spagenameZWDVW

sounds like you have a multitude of problems going on, after my second RX7 iv come to the conclusion that most of your problems can be found by inspecting everything attached to your intake manifold (vaclines, gaskets, grommets, seals, electrical components, rubber lines "liquids") then after that id check my spark, timing, and then replace all my filters.

This will eliminate most questions that will arise when attempting to resurrect your engine.

ive also been hearing danger, danger pulsation damper. id like to know both sides of the argument as to if its safe to replace a pulsation damper with something like a banjo bolt. this came from my constant smell of fuel while the car is running. anyone whos lerned in this matter please let me know, but i cant stress enough i would like to hear BOTH sides of the argument.

There is a great discussion in the 2nd gen archive section on this.

Okay fine, I hate cuntry, but, I'll get a banjo!!!
 

hey guess what i found, it is my pulsation damper. im ordering a banjo bolt Friday(10.11.07). ive heard good things about the banjo bolt so ill let ppl know when it gets in.

you ever look under the car while its running and watch for fuel dripping down?

My PD went bad, and it could have filled a shot glass in about 5 minutes. I used that as an opportunity to upgrade to a complete SS fuel system w/ an FPR that has a pulsation dampening function.

Or you could go for the banjo bolt. The PD only helps shield the injectors from the pulsations of the fuel pump, but it seems like the PD is far more failure prone than injectors.

Replace all the injector o-rings too and check the fuel lines for leaks.

Wouldnt bad or stuck seals be the only reason for your low compression? If your going to address your PD problem before the low compression problem, you should go ahead and send your injectors out to someone like withhunter for a good cleaning.

its not that im cheap but replacing the whole fuel system is out of my buget, for right now. and as far as the low compression, i would estimate that a large percentage of my fuel pression has be leaking out of my PD, this, as im told, is causing my motor to continuesly flood, which is whats responcible for my low compression.

banjo bolt FTW.

:scratch: NO. you are doing your compression test wrong if thats the case.

..and btw, last time i checked low fuel pressure = less gas in engine.

the last time i thought logic with a rotary motor, i found 5 10year rotary vets laughing at me, however those same 5 rotary vets, who have been a huge help with the revival, are the same ppl that told me that the leaking pulsation damper is causing my fuel pressure to fluctuate, causing my motor to flood.

right or wrong, that aside, i've decided to go ahead and replace all my vacuum lines while my intake manifold is off installing the banjo bolt. so i thought id cruse on over to ebay, and check out some prices, well this brought up an obvious problem, what size hoses will i need, and how much hose will i need. if anyone knows this off the top of their head that would be cool, if not when i wake up, ill look it up.

go to mazdatrix, you can get silicone vacuum lines far cheaper than going to the dealer and getting the exact lines. just the vacuum lines for the oil injection system including the 5 way splitter cost me $24.
and they tell you exactly how much length, and what sizes needed to do an entire vacuum job.

im sure it may not be causing it to run right but not flood. less gas is less gas thats all their is to it. id like to hear an explanation from the 'rotary vet'.