i bought the 1985 12a rx7 when i start the car i have to use the choke every time its not cold out here ???? also it idle steady at 200 rpms rouph idles exhuast pops every few seconds so i learned how to adjust the holly 4 barrel carb and the popping stoped my main question is should i leave it alone right now its steady at 1800 rpm or should i start over

 

Try adjusting the TPS. It should idle at 700-800 RPM when it's warmed up

 

is the tps on the carb is there a reason the prev ower had it set so high he claims it was bought as a daily doesn't know much about it thanks for the help

 

Stock, the motor should idle nicely around 800 RPM. Try adjusting the idle on the carb and look for any vacuum leaks.

What Holley are you running? Also, is there any modifications to the engine?

 

its a new holly 4 barrel carb thanks lots ive be researching and i think its ported maybe not i know there is no way to tell i turned the idle screw the lowest i could get it is at 1800 rpms sounds way better than it did at 200 i'll make a video if any are interested

 

If it's ported, that will effect the idle. The general rule of thumb is, the bigger the port, the higher the idle. Not necessarily by much though. A big street port should still idle around 1,000 RPM. It's when you go bridge port that idle speeds jump to 1500 RPMs and higher if the port is that big.

Carb size will also make a big difference. If its any bigger then a 600 CFM on anything smaller then a full bridge port. Its not goin to run at %100.

Generally the more obvious is vacuum leaks. Just a small vacuum leak can cause a high idle problem like the one you are describing.

 

i'll chek today stay tuned for the video link

 

VIDEO0001RX7 12A HIGH IDLE AND STARTING PROBLEMS - YouTube

 

I'm going to go with either a oversized carb or a full bridge port. Both would cause a high idle. If it's a full bridge, it's going to idle high because of port overlap. An oversized carb can cause a high idle and loss of power.

 

so should i set it back to the way it was 2000 rpms or try to get it a low as i can also i think the gas tank cover release is broken any ideas on how to open where is it anyway i looked everywhere

 

You want the idle low as possible while remaining smooth and steady.

The gas cover release is next to the chock cable. On the dash left of the steering wheel. If it doesn't pop by just hitting the switch try putting a small amount of pressure on the door while hitting the switch. When you hear a pop behind the door, let go immediately. It should pop open then.

 

If its bridgeported it should idle at 1500RPM.

 

ok thanks i'll start over and see still have to do a few thing s bleed brakes and check the steering and suspension will post a new vid of the idle i need help to see if its right fd3s i'm not sure if its bridgeported or not

 

I just listened to video and u have a full bridgeport. Nothing to wOrry with it just sounds cool hahaah. It should idle that high

 

thanks i figured as much but now i adjusted the fuel air mixture screws should i put it back the way it was

 

it idles at 1600 rpms now

 

Its cool i wouldn't worry with it as long as it drives good.

 

+thanks rotary fd and every one else 3 rd rx7 1st first gen tho very excited

 

i'm not convinced it's a bridge. however, on the off-chance that it is, you have A LOT of work to do before it will be worth a damn in terms of driving. it's time for investigation and troubleshooting.

 

Dude listen to the idle it goes wap wap wap wap and that's what a bridgeport does. Everything is fine don't worry with it. It'll be fine

 

dude .... you are aware that bridges aren't the only things that make that sound right, particularly when it's not as dramatic/prominent? as I said, i'm not convinced. he needs to confirm, and pray that it is not because there is much work to be done if it is.

 

Sure I'm aware. It just sounds like a port job to me.

 

so it begs the question; if you are aware, then why so assertive? why state it like you're so sure? if it sounds ported to YOU, then that's fine but leading him the conclusion that it's a "full bridge port, so it's alright, just leave it alone," is not only irresponsible, but it could be downright wrong. your first input to this thread was to check the TPS ... remember that one?

none of us (myself included) can sit here are state what this particular guy has. for all we know the choke is still on and the adjustments are way off. solving some problems just takes time.

 

I didn't mean to be assertive. I was going by the sound because when i rev my rx7 to 1500 it sounded nothing like that cars idle. But I'll leave it only. I don't wanna cause problems

 

diablo so......... can i get the refence links links for the trouble shooting thanks to every one who posted feed back rotary fd 3b miller diabolical1 no need to start going back and forth one big rx7 fam here all feedback is greatly appreciated i learn everthing i know about rx7 here