Misthael

About getting a f'ing Mikuni 44PHH sidedraft to work. I know it's not the engine, fuel delivery, timing, or spark. Everything has been ruled out and the f'er still won't start. This is really f'ing pissing off. I may just pull a Jesse James on my own car if the f'er doesn't start working. No vaccuum leak that I know of. Don't know how there could be one. Starter fluid doesn't work. WTF!?!?!?!?!!?!?!?!?!??!?!??!?!?!

680RWHP12A

maybee itsflooded? have you checked the plugs?

and if it dosnt start, everything is not ok!!!!

31rx7

Do you know the carb is good?

Misthael

It's not flooded. And no I don't know the carb is okay. I was assured it was fine and it's real clean and all. The jets were only installed a few days before I received the carb. I really hope I didn't get f'ed over. Getting real tired of this ****. Been without her for almost 2 months now I think.

nevarmore

Ok lets run down the no-start checklist from hell. I know you say everything is ok, but sit back and check it again. Trust me doing this fixes half of my car problems:
1. Fuel. Fresh fuel in the tank, a clean new fuel filter, is the fuel pump running, is fuel making it to the carb, is it getting there at the correct pressure, is fuel being drawn thru the carb into the motor?
2. Spark. Are all your plugs firing? If not are they new, are the wires hooked up right, is your timing set?
3. Fluids. Gasoline, oil, tranny fluid, gear oil, brake fluid, clutch fluid, coolant. Are they clean and topped up??
4. Electrical. Is the battery charged, what voltage is it at just sitting, what about cranking volts, is the starter turning over strong, is the starter engaging, are ALL electrical connections tight?
5. Compression. Yank the plugs and listen for the puffs. It should smell a tad gassy (BEANO!) if it doesnt you might not have your carb set up correctly.
6. Air. Is your air filter clean, are all your vacuum lines connected, are any solenoids checked and working?

Misthael

Check, check, check, check, check, and check.

Brand new spark plugs, fuel pump, fuel line, fuel pressure regulator, almost new starter, no air filter on so we can use the starter fluid, new fuel filter, new coolant, new oil, rebuilt engine, timing is set as close as it's gonna get. You can't set timing until the engine is idling. The distrbutor was put in exactly as it was supposed to be. The only thing I can think of is that the carb is bad. Not quite sure if the fuel is getting sucked in. There's some fuel dripping out, but if it was all dripping out there would be alot more on the engine.

dj55b

iTrader: (2)

try pouring some gas down your carb and see if it starts like that .... if it doesn't then its prob not from the carb. Try Try posting up some pictures maybe some of the guys here will be able to locate some problems visually.

Rx-7Doctor

iTrader: (13)

I've run that carb many times. It's one of the most simple reliable carbs i have ever seen. there has to be something you are missing. You need to do a fuel pressure/volume test. does it even act like it wants to fire? rx7doctor

Misthael

Could there be too much oil in the fuel? I don't have a linkage for the OMP. Right now it's just zip tied halfway open. Trying to start it runs the battery down quick. Is it supposed to? We fully charged the battery before hand. It started running down after about a minute of starting time. I know it's getting fuel. I forgot to put the fuel line on the first time I started it and fuel poured onto the floor. I don't have an allen wrench to adjust the FPR. The guage reads 4.5 psi, but the fuel pump is only supposed to go as high as 4 psi. WTF?

Tom

Your saying your not sure if the fuel is getting 'sucked in' the carb. Have you had someone visually inspect down the horns to see if fuel is indeed squirtin'?

nevarmore

There were some rumblings about shitty fuel guages a few weeks ago. The short version is there are good ones that tell you everythinh, and there are crappy ones that really don't tell you anything. See if you cant beg, borrow, steal, or buy another one.

Rx-7Doctor

iTrader: (13)

Rule out #1.
As far as battery goes. No it should not go down that quick, i would say if you have charged it and it goes dead that quick, it's on it's last leg. Swap it out with a good known battery or take it to the local auto parts store and have it testec. Probably after a couple of load tests it will show that it is shot.
remember that rotaries need cranking compression.
As far as the psi reading, their was nothing to regulate it thru the system.
You can have pressure but no volume and the pump is bad. Could be kinked rubber hose or improper ground or low voltage because of battery and not allowing the pump to function properly.
rx7doctor

Misthael

My dad was standing there watching. Next time I'll have him look into the barrels. I'm through with it for tonight. I used the stock wires for the fuel pump. Others have used them and they worked fine. The battery isn't that old, just a couple years. If there's less volume being pushed by the fuel pump then there would be a decrease in pressure. My fuel pressure regulator is the Holley one that alot of people on here have. I don't think it's crap. I bought it for the purpose of gettting a better regulator. I need to find the allen wrench to lower the psi. It's at 4.5. Maybe that's too much. More stuff to do tomorrow after work. I dont' know what day I have off this week. I can't stand driving a 1985 Ford LTD with a shitty transmission and/or computer.

Rx-7Doctor

iTrader: (13)

#1) Batteries can go bad in a month, Have it checked.
#2). Fuel pressure has nothing to with volume, you can have lots of pressure but low volume. Which means that it has pump pressure but not system pressure.
Pressue=psi, volume =output or flow. 2 different things. never rule out anything when it comes to replacing parts. There is always something that wants to foul up our mods. Rule of thumb, always check the basics. When in doubt see oprevious statement. Even the best of us who have been doing it for more years than you are old still hav eto remind ourselves,lol. Good luck. tommorow is another day. Don't let it get to you. i usually find when i come acroos a problem that if i walk away from it. usually the next day things are clearer. Unless i go to drikin because i'm over frustrated,lol. No comments out of you Wacky. rx7doctor

Rx-7Doctor

iTrader: (13)

Looks like i am developing stupid finger syndrome. Can't type worth a crap lately. Or is it because i truning into a post ***** and read my keyboard anymore?lol. rx7doctor

Tom

^ even if the volume is low and the pressure is pumping at 4.5, he should still be able to turn this thing over. It would run like crap or likely flood out pretty quick, but on a dry motor he should get something?

I think in his last thread he pulled the plugs thinking it was flooded and the plugs were a-ok, not wet, black or oily. A nice burnt, brown..

Misthael

I got new spark plugs since then. Tomorrow will bring more questions...

trochoid

iTrader: (6)

When I installed my Mikuni, I couldn't get it to run right with a fuel return hose. If you used the existing fuel hoses, the return on has a built in regulator ( that little silver barrel spliced in the return line).

I plugged the return line on mine and it ran better, but was still low of fuel psi, using the Holley fpr and a guage. Swiped the Carter pump off of another car and it worked fine.

With the fpr before the carb, and using the tee inlet that is on your mikuni, you may still not be getting enough fuel pressure. Either put the fpr after the carb, or plug the return line.

Misthael

I'm not using the return line. It's capped.

EDIT: Here's my FPR setup. Does it matter that the guage is directly mounted to the FPR? Shoudl it be mounted in hte line between hte FPR and the carb to show accurate pressure?

trochoid

iTrader: (6)

That's how I had mine mounted, even had the angle connector to read the gauge easier.

Are you sure you are getting fuel into the carb and through it? You might try putting some fuel in one of thse resteraunt (sp) style ketchup bottles, the old style, and squirting some fuel into the horns while cranking. Be extremely careful doing this, this type of carb can push fuel mixture back out of the velocity stacks.

Are you getting any fire at all? It sounded like you had it running the other night. Have you done anything different since then?

Misthael

No work on her tonight. I had to buy tools for work and eat. She hasn't run since the first time I put the carb on and even then it was hell trying to get her to start. Today while working I remembered that when a battery is run completely out it loses half it's capacity. I'm thinking of getting an Optima battery. Anybody have an Optima? If so which color? No matter what I'm getting a new battery. I need a day off to work on her.

DAVID GRIMES

Optima red 75/25 here. $112 shipped from ebay store. 910 CCA. Got the one with top and GM side posts. Nothing not to like so far. 3 year 100% replacement warranty, too. That's the clincher for me. Fits perfect. Has a base to attach for the stock position. I'll shitcan that when I relocate later.

Misthael

I should get a discount sinec I work at a Car Audio and Security shop now. I think they said approx. $100 for hte red top.