g;day ok heres the prob " i just bought an RX71980, with a 13b motor in it not the 12a back to the prob she runs sweet most of the time but for no reason it will start to run rough like its missing bad on 1 or 2 sparks as if its flooding , if i let the rpm down she stalls and there no chance of starting it 4 at least 30mins,when she does start very fuel-y (from being flooded right) now im thinking its the carb
ive checked the spark no poblem , funny it is that it only happens every now and then?
maybe some one else ahs had the same problem and can help me fast tack the fualt
thanks
its a 13b engine with a 4barrial carb, (looks standed")
motor has exstended ports
and yes it screams when shes running right
oh and if any ones got the diagram for the carby please send it to me i have a manaul but it doesnt show enough on the carby

 

What carb do you have..... an old nikki from an pre-RX7 13B?

 

You might be having ignition problems from a bad coil. Try swapping out your coils (leading for trailing and vice versa) and see if your problem persists

 

thanks guys for your answers

umm yeah as for the carb im not sure i beleave it a standed 4barriel for the 13b i cant see any name on it ?
tell me what to look for, i have just put a fuel additive in the tank suppost to clean the carby ,well see if it works. i have also changed the fuel pump over with the spare i have as the other would tick over all the time i beleave it should slow down as the presure builds up? , my thinking the other might have had a hole in the diapham , it could be some thing as basic as some dirt in the float bowl that is only sticking every now and then i really dont want to pull it down with out some plans of the carb


i tryed the ignition sys i am getting a good spark how ever i will try and change the coils i have two spare when i bought the car i got another complet 1980RX7 with it also has a 13b motor (in peaces thought the hole thing some thing to play with not to mention the spares side of it )


i started to change the front link rubber its just a 6" bolt lol but the sleave on it was rusted bad and its a long weekend here so nothing open till tuesday boo who, but im sure the standed bolt i put in it will be fine till i get the proper ones then (keeps me on the road
( sorry about the spelling not my best subject)

 

No Rx-7 ever came with a carbureted 13b, so its either from an earlier rotary or its a Holley or something else aftermarket.

Conway

 

Does it have a light blue air cleaner on top of the carb? If so, then it's a stock carb from a pre RX-7 car.

 

well there you go you learn something new every day, then i cannot tell you what carby it is till i find out more and it had a sports air filter on it , but there was a light blue one and a black air cleaner in one of the boxs?? not much help am i

mattsauto i just chenged the two coils for the 2 out of the other car and it seems to be a lot easyer to start? but i wont know more till i take her out tomorrow for a run down the coast about 500km round trip on my own with out the wife and kids hehe time for some flirting lol you now look but dont touch hahaha


Conway
so what were all 13bs fuel injected then?

 

All rx-7 13bs were unless someone swapped the FI for an aftermarket carb... the 4 port were carbed stock though, but they weren't in rx-7s

 

hmm i would have thought injecters would be the better opp? why would you rather a carby for any ideas?

 

You can gain roughly 30-40hp from putting a nice carb on a FI 13b

 

ok so the carbs not so bad after all
well she does scream and i mean scream this is my fist RX7 im usauly a holden man 308s hz ute when i get a pic ill post it they look alright i think for only $4000au thats maybe $2300us give or take i seen worse in car yards for 5000 and i got a second complet 80 RX7 with it and a second 13b motor all of which is in peaces mind you lol still i got one of every thing for a spare

oh and i love the nose cone on the white one in your pic

 

A big carb can flow better then the stock FI system, so it can make more power. However, a FI system can outperform a carb. So, why not just use a "big" FI system? Because it can cost several times the price of the car, as opposed to the sub-$1000 price of the big carb.

Conway

 

ok took the car for a road ticket today not bad a few little things the fix is all ,
1.bolt sets down lol , as if i wouldnt any way
2.ball joints,
3.brake pad front and back,
4.no second speed on the wipers (split wire is all),
5.air fan heat/cool aur not working(sucks that he hit me for that )
6.battery clamp
7.two uni joints (i can think of better joint
8.and lucky last a rear brake cylinder ( but im going to replace both might as well)
so thats not to bad
i changed the coil leads over as on the test drive today she still played up , funny thing is it runs sweet as ??? lol still plays up every now and then but i only need to give it a few revs and she goes fine if that dont work i stop kill the engine for a few sec's start her up and shes fine again lol strange??? ( makes me think theres some dirt in the fuel bowl gets sucked up and blocks the jet maybe when i stop the engine it sinks to the bottom of the fuel bowl??? just a thought and i had it happen to an old desiel truck i owned
so we are getting there so keep the ideas coming
and ill have some pic's in 2 or 3 days if any one wants to see

 

oh and i got a prob with the cluch im told its a new cluch and presure plate, but i need to adjust the cluch up and theres the problem i've bleed it but can find no where to adjust it so whats the most likely cause???

 

ok guys i'm moving to the aussie site thanks for all your help cya all
oh i did the dam cluch in today though there was something wrong with it , im pulling the gear box off now just having a brake man these gear boxs are so much easyer to handle then the ones in just about all holdens,oh and so much for the new cluch +plate but still ill have a looks when i get it off in about half an hour if i get away from the net lol brrrmmmmm brrrrmmmmmmm beep beep or more like a quack quack
keep a look out for thunder as ill try to post some pics of her by monday if ya want to see them that is