i always have to turn the key half way then pump the gas twice b4 my 1985 rx7 starts.

i only started doing this recently when i the weather got colder and also i think i flooded it..

i thought i fixed it before by doing that technique

(1. turn key to on but not start to get the fuel pump going
2. pull choke out
3. pedal to the floor 2 times
4. start )

but since then i always had to do it..


then i again i only got the car so i dont know the real history of it..

tell me guys if theres any real long term damage if i keep doing this to my beautfiul first gen..

oh and im glad the forum is back up

thanx for the help guys

 

no I dont think its bad at all. I give my car 8 quick pumps of the gas and start it in cold weather. fires right up.

 

Yea, its fine, all carb cars seem to have their little quirks about starting.

 

I have no choke at all on bridgeport's weber 50dco. I pump it like 10 times and it starts right up and then dies no matter how much you try to keep it going. I usually have to do this 3times when its below 25F. I don't have any problem getting going on 50F+ days with 3-4pumps and then starts.

Today it didn't even get above 25F! You gotta love Minnesota. At least the snow isn't on the ground yet and tomorrow is Dec 1st.

 

I hate cold weather, its like 30F right now here. My car hates this weather, it doenst wanna idle after the choke pulls off, what a pita

 

You need some tuning then. Back when I lived up north, my 84 GS idled fine in winter always.

 

correct me if I'm wrong here, but wasnt it only the SE's that would turn on the fuel pump when you turned the key to on?

I'm 99.99999% sure because of the EGI system on the SE's... and turning the key on my 85GS to on, never did anything to the fuel pump.

 

Nope, my '82 and '83 GSL's turn on their fuel pumps with the key in the 'ON' position. The '82 is still stock. The '83 has an aftermarket fuel pump though the wiring should still be the same.

 

no, i think S1 and S2 cars run the fuel pump while the key is on while S3 cars only run it when the engine is running.
rx7carl: what would you suggest i do to fix it? richen the mixture? Its gotta be something carb related cause most of the ignition is new: plugs, wires, rotor, and the timing is dead on.

 

no the trick i told you wont hurt it... ya know where i got that trick from?? my buddy bret who a rotary expert. he works down in VA at Rotary Performance.

--eric

 

AHEM! Can you clue us in on this???

 

Yes about the S3's. Dunno about the S1, S2's. The S3's will run the fuel pump key on, if you un-plug the emissions computer.

To adjust the mixture, use a vacuum gauge. Adjust the screw for max vacuum, then lower idle speed, rinse lather repeat.

Also trans am your dashpot may be bad or mis-adjusted. When It drops off fast idle/choke, the dashpot should allow for a nice easy rpm drop. If yours is defective, then the big rpm drop will kill the engine, then you start it up and it will run fine (sound familiar?)

 

ok, this makes me feel like a noob, but where do you attach the vaccum gauge? also, wheres teh dash pot and how do I adjust it?
Well, if its mildly cold, like high 30'sF to low 40'sF then yes its dies then starts right up and idles fine. But in colder weather like freezing and below it dies, starts right up, dies, and continues like that for a good 5 mins of driving (coincidently right in traffic in my drive every morning, really annoying) then its fine afterwards.
How much does a vaccum gauge cost?

 

clue in on what?

--eric

 

See above...what trick?????

 

Attach it at one of the vacuum ports on the carb spacer. The dashpot is the round thing at the back of the carb. It has a plunger at the bottom that touches the big flat tab on the carb linkage. It slows throttle closing when you let off the gas so it doesnt slam shut. Look in your manual, FSM or haynes, adjustment info is in there.

 

thanks for the info carl. Its that round black thing right?. The trick hes talking about is that 4 step thing in timmys first post.

 

ooo.... the trick that timmya2 said in the original post at the top... i told him that

--eric

 

No, thats the throttle opener for the A/C. This has no vacuum lines, or electrical connectors. It is a diaphragm filled with oil and has a white plunger that sticks down.

 

yea yea yea......sometimes I'm a bit of a

 

Man, when I had my 84 GS, it would only take one pump of the gas (with the choke pulled out) and it would start up no problem, even in -20degrees Celcius weather. And my car was stock.

 

my 85 GS took three pumps with the choke when it was cold. Now with the Mikuni on there it takes 5. The pedal makes the accelerator pump squirt a little gas into the carb and gives you a head start with a rich mixture.

 

damn now its hot and i still have to pump twice..

is this bad?

 

Na, that sounds pretty normal if you don't have the hot start assist on any more or have a monster weber with no choke on it like mine.

 

what is a "hot start assist"

mine has a choke on it ..

and how do i do those qoute things