FormulaOneFan

85 rx7 , New plugs, fuel filter, seafoam in carb and tank,rotor, cap, wires and fresh gas. It's been sitting 2 years. I can get it to go a sputtering down the block but once the choke is in nothing! Also I have a RB header and exhaust,all those hoses that came off the old exhaust should they be plugged or rerouted? I checked my fuel pump (by a volume test and its pumping a little more than 1100 cc per minute. What now? It seems like I am so close! Help please!

mazdaverx713b

iTrader: (91)

check for spark by pulling off a spark plug wire, grab one of your old plugs and insert it into the wire. ground that to the strut tower or one of the mount's bolts an crank the egine. look for spark there. try that with one wire from the leading and one from the trailing. report back with what you find.

FormulaOneFan

I will try that tommorow. But the car is starting... it just wont stay running ...I guess I was not thinking of sparking after ignition.

Jozay721

check all of ur vaccum lines, if u got a small leak it will idle rough, but if u got a big leak it will stall. just some advice if the spark isnt the problem.

lowkee33

iTrader: (8)

Spray carb cleaner around your vac lines to see if it sucks any in. If so that centralizes your leak so you can plug it. It sounds like you're having about the same problem as me, except mine doesn't stall. I took off the rats nest even. Possibility?

Midwest 7's

iTrader: (4)

now may be a good time for a nice 2 barrel.

FormulaOneFan

Okay, I have yet to try the spark plug trick. I need a second person to turn the car over and its raining. I will have to recruit my fiance. I also removed the nozzle over the check ball pulled out the ball it was spic and span! plus I dripped some carb cleaner down there too.I just don't think I am getting feul after the choke goes in. Could it be the accelarator pump?
Man I am going CRAZY!!

IanS

iTrader: (4)

Most times an accel pump is "bad", its just the gasket leaking. Sounds like a huge vac leak to me. If its a big leak, the car will die when the choke goes in like you are describing.

FormulaOneFan

Also I sprayed carb cleaner around but that crap dries so fast. I can't tell. And when I try to pump the pedal just before it stalls it has a big dead spot like its either sucking air or choking on it! I am also wondering about the hoses that go from the air cleaner to the exhaust. Since I have a header those hoses have no homes do they get plugged? Is there a tutorial on checking for vacuum leaks?

trochoid

iTrader: (6)

One hose that goes to the air cleaner must be plugged if the air cleaner is off. It supplies vacuum to the rats nest.

FormulaOneFan

Okay I downloaded the carb manual, Thanks for the link!
I removed the airhorn pulled out the other checkball under the horn sprayed the carb with cleaner and used compressed air all over. the pump shot is now very good but it is still bogging down and stalling. Then I raised the idle to 1100 rpms. The car will idle most of the time but it still is sputtering under acceleration. Whats my next move?

trochoid

iTrader: (6)

Is the level in the fuel bowls dropping when reved for a bit? If so, then check the fuel supply. Pump, filter, blow out the line going into the tank, etc..

cdrad51

Sell the car to me. I'll give you 100 bux.

FormulaOneFan

Don't tempt me!

KeloidJonesJr.

iTrader: (8)

I know no one has said this, but could it be the TPS?

thunderpup

The lines to the exhaust need to be connected. Start the car with the choke on, hood open, and walk to the passenger side of the car. You should be able to hear the vacuum leak. The leak will be most likely from an aluminum tube, lower than the carb, towards the rear of the engine on the passengers side. Right around the rear of the exhaust manifold. There may be a rubber hose connected to it, which runs to another aluminum tube, which in turn runs to the exhaust.

Good luck,
Jon

FormulaOneFan

Okay, But I have a header... These hoses no longer have a place to go, or the flexible hose that comes off the bottom of the horn on the air cleaner. Do these hoses get plugged or rerouted somehow?

pjr

iTrader: (8)

Any luck so far?

Kentetsu

Go to Racing Beat and look for the blockoff plates. These need to be installed (or fabricated) or you will have a massive leak on your intake, and I forget where else...

vipernicus42

iTrader: (4)

You mentioned that the car had been sitting for 2 years. From experience I can tell you that a lot of things can gum up in 2 years.

Since draining the gas, replacing the fuel filter and checking the ignition have all been done, chances are that the inside of your carburetor has probably seen better days. I'd look at rebuilding it, or replacing it.

Jon

Kentetsu

"Also I have a RB header and exhaust,all those hoses that came off the old exhaust should they be plugged or rerouted?"

Why do I feel like Thunderpup and I are the only ones who caught this?

FormulaOneFan

Because you guys are the only ones ( although everyone has been helpful) that have mentioned it!

FormulaOneFan

I took off the airhorn and cleaned the **** out of it! So now I have a good pump shot but still there is something wrong with the sputtering and dead spots on acceleration.

FormulaOneFan

Here is the stupid question- Why do I need block off plates when we are talking about hoses? I have not removed the rats nest.Heres the other dumb one- Since I have a header do I have to remove the avc valve?

perfect_circle

could you possibly take a picture of the intake and carb? so we can get a look to see if anything is out of place.