87 rx7 turbo. on cold start up, leaks fuel. Once it is warmed up will idle all day without leaking fuel.

 

depends on where it is leaking from, your description is VERY vague. the fuel lines to the engine can crack, the fuel lines on the engine can crack or slip loose OR your fuel pulsation dampener could be failing which is a very common problem. the latter 2 issues require partial disassembly of the engine to get to, the first is as easy as replacing the 2 fuel lines to the rats nest on the driver side of the engine.

 

Jump the yellow fuel pump test connector (passenger shock tower), turn the ignition to 'ON', and start searching under the hood. In addition to the areas Karack mentioned, you can also get a fuel leak from the fuel rails if the injector o-rings have failed.

 

Thanks to you both but why is there no leak when engine is warmed up?

 

just about everything known to man expands when warm versus cold. expansion is a natural sealer.

 

After I changed my PD to a banjo bolt I had a gas leak when cold and stopped after warm up. I pulled the fuel rails and replaced the injector grommets and o rings and it stopped. Just a suggestion. Cost 15 bux and about two hours work.

 

thanks. it's probably time i checked the o-rings and injector seals.

 

They made a fuel pump check connector for problems like this.

You jumper the fuel pump check connector and put the key to just ON.

Then wait atleast fifteen minutes and look for fuel dripping from the source of the leak. Easy as that.

 

except for water between frozen/liquid