is there any way to fix 1974

[don gilbert]

any fuel behind that screw is from a leaking diaphram in the acumulator. Later models had a hose from the screw back to the return line going to the tank. You need a new one, it will eventually tear all the way and it will be hard to start a warm engine, as the accumulator is what keeps your residual pressure there for next start up. get a new one or get some insurance. sealing the screw hole with sealant is not the way to fix it. who is Grady Clay?

[boyt911sc]

Originally Posted by 930 slant nose

leaky fuel accumulator leaks on bottom right by the little screw
thx in advance

These are the two (2) most common FA (fuel accumulators) you'll find in 911 CIS engines.



These are almost interchangeable in application. The major difference between the two (2) is the bottom port for the drain line used in later 911 CIS engines. The presence of fuel at the bottom chamber for earlier FA (with no drain-line) is an indication of ruptured or broken diaphragm. However, this is not completely true for the FA with drain-line. Its bottom chamber does have fuel during operation. A simple pressure test will show whether the diaphragm is broken or not.

Your FA is bad and has to be replaced to prevent accidental fire. The engine would still start OK if you allow enough time for the FP to build the fuel pressure because in your case, the FP does run as soon as you turn the ignition to ON/RUN position. FP's for CIS engines with FP relay don't run when ignition switch is @ on/RUN position.

Tony

[pplkook]

Originally Posted by crustychief

Yeah, Grady probably can't help you.

You made coffee come out my nose. Only a "Well bless your heart" would have been more subtle....

+1

[James Brown]

Bless my azz, this guy is a jerk!!!

[Joe Bob]

Originally Posted by James Brown

Bless my azz, this guy is a jerk!!!

It's NY thing......when I first hurt my back, I went off on a guy that was snotty to me on a simple question.....got a 2 week time out for it.

[Wil Ferch]

Hey....there's NY (state)...and there's NY ( city)......don't lump us all together as from the same place with the stereotype, cocaine-driven hyper intensive, insensitive responses... !!!!

[James Brown]

Yes it's a NY CITY, slant nose cab. driver, ugh...

[930 slant nose]

what are all you people talking about

[930 slant nose]

i didn't disrespect anyone all i said if he needed a picture then he probably never ran into this problem because there is only one accumulator with screw on bottom for a 1974 911 .

[Joe Bob]

Yeah, shoulda said NY, NY....my bad....

[930 slant nose]

boyt the cars first start only if i hold my foot on gas pedal then no problem starting again all day i wonder if this has something to do with it only first cold start
thx

[930 slant nose]

hey james why am i a jerk

[longhornchris04]

Well, the jerk comment was because you bluntly blew off one of the forum's 'graybeards' who as others have mentioned knows as much about these cars as the Germans who designed them... possibly more.

As to your cold start problems, there are a number of potentials.
- 1: fuel accumulator isn't holding pressure overnight... if its leaking this is certainly contributing.
- 2: cold start valve isn't firing, or isn't firing properly.
- 3: The '74 doesn't have the AAR (or AAV, I get them confused), and instead has a hand throttle to provide extra air during startup. Are you following the correct cold start procedures? I don't know them, but I do know its more complicated then "Insert key, turn key" Hopefully somebody with 2.7 will post the startup procedures.

Also, if you are starting the car with the throttle floored, I hope you have a Pop-of-valve installed in your airbox. If not you are risking a backfire cracking the airbox. Those run around $500 unless you find a used one... plus the time to replace it.

Fix the accumulator first, because you know its a problem. Once that's fixed, if the problem persists check your CSV for operation. A quick forum search should yield some testing procedures.

[James Brown]

Sorry, not a jerk, just a NY NY person, my bad, I apologies. Oh and BTW I like the color of that hot rod, what is it?
Don't take it personally, there are all kinds of people on here, the wine and cheese crowd from California, the tree huggers from Oregon, the deep south Miami sunglass crowd, not many Jersey types, and the great ones from the PNW. So as you see, we are many,divers, different, but Very knowledgeable in Porsche's. So ask your questions and be prepared to learn something.

[930 slant nose]

its white pearl thx i forgot its probably if i remember infinity white pearl believe me i was not offended i just wanted to know why anyway theres not a problem on my end no need to apologize

[930 slant nose]

just touching the throttle barely like 1300 rpms im not nuts altogether

[ossiblue]

Originally Posted by 930 slant nose

boyt the cars first start only if i hold my foot on gas pedal then no problem starting again all day i wonder if this has something to do with it only first cold start
thx

longhornchris04 has already addressed part of the start up procedure in his post but there is something you should know as well regarding the 74. The hand throttle is to be used on cold start for two reasons: one, it provides a measured amount of throttle (it actually pulls on the throttle cable) for cold start running and, two, it activates the micro-switch on the throttle body which allows the cold start injector to shoot fuel into the intake. Using your foot to push on the gas pedal will accomplish the same thing but you do risk a huge backfire as mentioned. The manual for these early CIS clearly state that you should not push fully down on the gas pedal.

It's quite possible the cam in the tunnel that activates the hand throttle/cable has broken and that's why you don't use the throttle--not an uncommon failure in the old cars. If your current starting procedure results in immediate firing (once system pressure is maintained--you do have a leaking accumulator), then your cold start injector is working properly. Your car does not have any of the "automated" warm up features of later CIS (aar, aav for example) so you are in control of the process from the get-go.

[JeremyD]

Thanks for that L.J. - Learned something new today. I also have a 1974. I was also wondering why the hand throttle worked better with cold start than just holding or pumping the gas pedal. Now I know.

[930 slant nose]

lj where is the hand throttle usually
thx mike

[930 slant nose]

oh thats what the lever is for between the seats i never started with that will ttry after put new accumulator in.
thx