Rabban

Hi!

I'm George Peczely from Hungary. (I don't know which icon to use to give my location, so I chose SK as it is Slovakia, the nearest country to Hungary...)

My Rx-7 has a starting issue. I summarize what i found and did so far:
- When I try to start the engine, it feels like it would start for a few seconds, but after that it stops. It looks like it gets too much fuel. When I try to start it again, the starter motor only spins the engine, but it wont start.
- First I thought it was flooding issue, but after de-flooding, the same thing happened.
- I also checked the ignition, it is all Ok. The plugs are new.
- When I look at the little windows on the carb, they are full, the fuel level is far over the middle line. However, I also tried to repair the carb. It was disassembled, cleaned, and the pins were replaced. The fuel level is still high after all.

I ran out of ideas, do you have any hint I should try? Thank you!

George

misterstyx69

iTrader: (142)

actually the Icon is for Saskatchewan Canada,but hey..what ever you want George!..Slovakia works too..lol!
Thread approved!

Rabban

Hi!

I add some new details hoping that it would boost replies...

So, before the whole problem started, I took the car to a mechanic to repair the fuel level sensor, because it was not operating. For this, I was told the fuel tank had to be removed, and of course the fuel had to be drained and refilled after.

I thought this "repair" could have caused my problem, as the slug (gunk?) on the bottom of the tank was mixed-up. But after the carb is cleaned and rebuilt, the problem is still present, so this couldn't be the cause...

Any suggestions?
Thanks!

George

p.s. Which icon should I use?

diabolical1

iTrader: (3)

welcome to the board.

first of all, are the plugs wet?

i'm of two minds on this:
1. could still be flooded if you're getting adequate (or too much) fuel to the carburetor. keep in mind deflooding simply increases your chances of firing after it's been flooded, it DOES NOT guarantee it. old plugs. new plugs. it doesn't matter. it doesn't always work. also, when did you last check your cap and rotor?
2. it could also be some sort of obstruction to the fuel flow because while you mentioned dropping the tank, but I didn't see where you mentioned cleaning the tank and replacing the filter.

start with those things and let us know what you find.

Rabban

Hi!

1. The plugs are certanly not wet. I think I've done a good de-flooding. I took all plugs out, than I disconnected the two small wires from the ignition coils, and cranked the engine for 8-10 secs three times. After I let the car stay for a day plugs out. After the procedure, I tried to start the car, and the same happened: I seemed to start, but after a few coughs, just cranking, but no ignition. I also exclude flooding, because the engine had never flooded before. It always started, even after stopping in -4 Celsius degrees after a short run with bad old plugs.
2. I checked if there is an obstruction in the fuel line. I disconnected the fuel hose from the carb, then I ignited, and fuel came. However, I think I found something. The manuals says that if I do the inspection I described, the volume of the should be something (I don't remember exactly), and in my case, the volume was more than double. So it looks like the fuel pressure is high also. Do you think this can cause my problem?
Thanks!
George

diabolical1

iTrader: (3)

did you set yourself on fire as a diagnostic technique or an act of coercion?

(sorry, I couldn't resist )

really though, how old are the cap and rotor?

Rabban

I see what I wrote . Sry, I'm not native, I guess I'll do something like this again.

How old is the cap and rotor? Actuallí I don't know. The car was manufactured in '84, but I'm not sure if there was a rebuild before.

George

diabolical1

iTrader: (3)

no apology necessary. I figured it was a difference in language - it just sounded funny when I read it. so I figured i'd poke a little fun at you. it wasn't meant as real ridicule or anything.

for the sake of clarity, by cap and rotor, I mean your ignition components (on the distributor). you may be seeing spark, but it may not be enough to fire the engine and that can also cause flooding.

Rabban

Hi!

I like laughing, and reading your comment, I started a big one

Before the problem, I never noticed any problem with the ignition, and the timings were ok (I checked them). Also, what I see is that the fuel level is high in the carb (I can see it in the little windows on both side). Therefore I think the problem is in the fuel line or the carb.

George

diabolical1

iTrader: (3)

somehow I managed to miss this part of your situation.

what kind of fuel pump are you running? too much pressure can cause flooding, but you should see some signs of it (smell, wet plugs, backfire, something ...) you should probably put a gauge on it and see what you're running.

https://www.rx7club.com/1st-generati...levels-967051/

Rabban

Hi!

Thanks for the float level adjustment link!

Man, you gave me a good hint! I decided to check the fuel pump, and what did I find, or what I didn't find? I didn't find a fuel filter!!! LOL Also, the pump is not the original one. How can a mechanic be so tard, to replace the fuel pump and forget that there should be a fuel filter too...

The plan is to replace the fuel pump (what kind should I buy?) and also the fuel filter. Then we will see what happens!

George

diabolical1

iTrader: (3)

it's probably a good idea to find out what you have first. post a photo of the pump if you can. as long as it's not a case where the ... "mechanic" ... put something ridiculous (like an EFI-grade pump), then all you may need is a simple regulator. I simply don't know what you have readily available in your country, but if you do end up needing a different pump, then get something that will yield similar performance to a 70+ Lph pump (Carter, Mallory, Holley, etc.).

unfortunately, it's likely you've now pumped a lot of crap/debris to the carburetor now, so you may want to take a look at that and take action if need be. better to find out about the filter now than while you're miles away from home and stuck on the side of the road, I guess.

if my responses are helpful, then you're more than welcome.

Rabban

Hi!

I don't have a photo of my fuel pump. However I'll replace it anyways, as it has a terrible sound My choice for a new fuel pump is Airtex E8124. What is your opinion? I bought a nice new fuel filter also.

Not to cause more damage, I decided to not use the car until the fuel pump is replaced. However, I checked the whole fuel line. The fuel hose connecting the tank and the fuel pump is in very bad condition. I will have to replace it. Also, if I compare what I see to the factory manual, the fuel cut-off valve and its bracket is missing (the one that cuts the fuel line at turnover). I will have to find replacement. Do you have any hint where I can get one?

George