AK47PERFORMANCE

Hi guys,

I have a 82 RX7. I don't have any idea what the previous owner did to the car, but its carbed and everything looks pretty much stock. The car starts on starter fluid but it craps out after about 3 seconds. I figure the carb is clogged up.

But anyway, there were a bunch of parts in the back when i got it. And heres what i have... looks like a fuel injected setup?









If thats what it is, would i be better off just rebuilding the carb? or spending time to go injected... This car is NOT a daily, just a little project.

THANKS

trochoid

iTrader: (6)

That's an S4 TII intake. Post pics of the engine.

AK47PERFORMANCE

AK47PERFORMANCE

any ideas fellas?

Seamoan

looks like a fuel injected setup in the back

PvillKnight7

iTrader: (16)

Forget about the S4 turbo manifolds. Are you using the choke? Splice a clear glass fuel filter into the fuel line that feeds the carb...right after that small 1" aluminum check valve in the hose. Also, what's that tissue/napkin doing under the throttle linkage. The top of the block looks wet, what's that? Fuel, oil...? Don't bother converting the car to fuel injection. Too much work. Carb rebuild kits are $28 but I doubt it's necessary. More likely it's something else...verify fuel flow to the carb first. Wipe the grim off the bowl sight glass and use a mirror to check that the fuel level is in the middle of the sight glass on the front and rear float bowls.

Also, take the carb hat and filter off and look inside the carb. See the venturi rings? There are nozzles that squirt fuel into each of the 4 rings. There should be two equal streams of fuel flowing from a nozzle to each rotor when the engine is running. Watch your eyebrows if you're using starter fluid to start the car.

You might find these links helpful:
http://intertron.com/ron/carb.html
http://free-info-pages.com/rx7-rebui...r-yourself.htm
http://www.vintagerotaries.org/index.php?showtopic=17

mikeric

iTrader: (20)

Yup, those are S4 turbo manifolds and do not fit on your engine. He must of gotten them off someone or started collecting parts for a turbo swap.

AK47PERFORMANCE

Ok, that 'rag' is actually snow, haha. Just had a storm here in Mi. The reason why the block is wet, is because i ran all the fuel out of the tank because it was completely turned to varnish. This is why i think the carb is clogged. I just ran the pump until the gallon or so of varnish was out and i spilled a little on the car. When i start is on fluid, the choke does function and raise the idle, but like i said, as soon as it burns off the starting fluid it just dies right away. The carb is not spitting out fuel. So your saying run a t valve? Were should i get one, home depot?

Kentetsu

Replace the fuel filter, and see if the pump is working. Do that before you start tampering with the carb, otherwise you could be opening a whole other can of worms.

I can't view the pictures right now, but I'll take a look when I get home and post up if I see anything noteworthy.



.

OneRotor

iTrader: (3)

where are you located in Detroit?

PvillKnight7

iTrader: (16)

What's a "t valve"? I said glass fuel filter. Like this:


Varnish is not good. Assume all the sludge was caught by the fuel filter or is still in the tank. Drain the tank and rinse it out with clean fuel until clean fuel comes out. Replace the stock fuel filter with a new one. Install the clear glass fuel filter between the aluminum check valve and the carb. Verify good fuel flow to the carb by watching the clear filter or removing the fuel line at the carb, place it in a container and turn the ignition on. The pump should pump fuel into the container. Put the line back on the carb and turn the ignition on. You should hear the pump run until each of the two fuel bowls on the carb is half filled and the fuel feed line is pressurized. Then the pump turns off. Verify that the bowls are half filled by looking through the sight glasses.

If you all this and you do have fuel flow to the carb and the bowls are filled halfway but the engine still dies you need to check the fuel squirter tubes for even flow. Take off the carb hat (its blue with 4 locking clips) and look for 2 of these:

AK47PERFORMANCE

Ok i have already removed all the varnish from the tank. I did it the easy
way by taking the fuel line off the carb, and running the pump. I filled up a gallon container with the bad fuel. I understand this containinated the filter, but the fuel runs clean now and it pumps out at a decent volume. Regardless of the pumps volume, i know its enough to fill the bowls. I can tell for a fact that the carb is not supplying the car with any fuel. It runs off the amount of starter fluid that i put in, then it just immediately shuts off. The car will not on its own at all, and i can verify that the carb has fuel in it.

BTW, my pump runs continuously, it doesn't shut off (i thought this was ok for carbed applications)

So now does it sound like my carb it clogged up?

PvillKnight7

iTrader: (16)

Yes. If the fuel is getting into the bowls but not the engine then the problem is in the carb.

Kentetsu

Why install a filter between the carb and the check valve? That check valve is on the return line.

Your float needles are stuck. Bang on the top of the carb with a plastic hammer, or something else that won't cause any damage. The needles are stuck, so they won't allow fuel into the carb. You need to shake 'em loose now.

PvillKnight7

iTrader: (16)

Your right, my mistake. I forgot which line was the feed. The plastic hammer is definitely worth trying.