my84gslrx

hey here is my carb issues on video before i tryed describing them but it dident work, heres the old thread link.

https://www.rx7club.com/showthread.p...ight=my84gslrx

one video of first start.
http://www.youtube.com/watch?v=MvGmrCDWnxE


number two
http://www.youtube.com/watch?v=rJtUKpywzBk

please tell me your opinions...

bstrange99

Wow! that's like the Blair witch rotary project. I think I'm a little dizzy from watching it.
I gotta ask, although I don't think it's the problem, what's your fuel pressure?
I think it's a vacuume issue. pull that big hose off the back of the intake and check the lower elbow for a crack. It's impossible to see without removing it. Also, did you remove the intake, or just the carb? gaskets may be an issue or a damaged phenolic spacer.

JoeyMazda

I think you got a problem with the floaters from the carb. Take it back to whoever rebuilt it & have it rechecked.

waysrx7

Looks like your air pump was removed, I can't see from the video but did you also remove and block off the ACV on the intake manifold?


It doesn't help but I suggest finding a carb from a parts car.

my84gslrx

yea i have a parts carb here no i never touched the manifold, just the carb...acv is gone with a block offplate and gasket. and i pluged that big vacuum hose up but i didnt check for cracks, also when it idles it idles good.. and no vacuum sound from anywhere....and joey the level is halfway on the sight glasses, but i never checked the pressure being as i herd that some gauges arent accurate and there is only one good one out there...read it on this fourm somewhere

blackdeath647

iTrader: (2)

i was gonna go with vacuum leak for your starting troubles, but i believe i'm leaning more towards, timing, check and make sure it's where it's supposed to be. I also can't tell very well, if it's fuel starvation, or too much? my guess will be starvation if your delivery system is still stock. it won't hurt to check fuel filter, start with the basics/cheaper stuff first lol. at its first stages a clogged fuel filter will make the car idle normally, but is not able to deliver enough fuel under load.

my84gslrx

drained tank/ new filter/ took air horn off and cranked and it shot out clean gas, like i said before i never touched timing, advance is hooked up and wires go to correct spots

technically its not hard to start, couple pumps and it fires just so hard to keep running i have to rapidly keep tapping the gas, fuel delivery is stock

waysrx7

It sounds like my old carb did and the only conclusion I came up with was that there was some sort of internal clog somewhere in the carb because I swapped in a different carb and then the car ran fine. I suggest you try another carb or rebuild the carb again.

Edit: I never did find out what was wrong the the old carb. Once I had the car running I didn't want to try to fix the old one.

my84gslrx

yea, it actually ran good when i first got it and did the atf method, i had idle perfect, low end power, it would take off fine and all but once i tried for more it would get fuel starved like i could literally floor it in neutral and i would be lucky to get past 6 grand to the floor!! lol but i got it rebuilt by bijan in California and it really hasn't worked yet, i have a parts carb that i bought from a member here but when i put it on it didn't draw any gas, even accelerator pump don't work. so i just kept trying this one, and accelerator pump works and all but it will never run right

blackdeath647

iTrader: (2)

i would take it back to them, tell them it's not working right see if they can fix it. I'm sure they'd give you some kind of warranty or something, atleast a 30 day one :P

jdi_knght

Just looked at the video. When you're looking down the carb from within the engine bay when it's running (and you're feathering from within the engine bay), is gas coming out the primary jets pretty evenly?

Edit: nevermind. I could see them in the 2nd video.

Kentetsu

Have you checked the infamous teeter totter?

Also, for tuning the idle mixture and idle speed, there is a great writeup over at www.sterlingmetalworks.com He'll walk you through the process to at least get it idling correctly.

And if it will currently idle (can't watch the videos while at work) at anything around 800 rpms, then you probably aren't looking at a vacuum leak.

Hope this helps....


.

Jeezus

iTrader: (4)

Get a can of carburetor cleaner and spray a little bit here and there around the hoses and spacer of the carburetor. If you hear it do anything out of the ordinary, then spray there again. If it stumbles then there is your vacuum leak, if you do have one.

my84gslrx

yea i can get the car to idle correctly with tweeking of the idle screw and air fuel i no lie had it idleing for like 1 hour one day at 775rpms but still had the bog problem so i cant drive it. i actually just took off everything i blocked up the anti after burn hose port on the manifold with jb weld, the main cat elbow is blocked, shutter valve is removed and thoes holes are nicely jb welded up, nothing else could be leaking because i never took off the manifold and the brake booster line is good, so after i get the carb re rebuilt and put two new gaskets and the spacer on disy to the 2nd from the left and run the crank case vent to one ill plug the other 3 and it should be fine i hope because if it was a vacuum leak i dont think i would be idleing at 775 or so for an hour a couple weeks ago and i was so i am thinking it was the carb anyway

openshot

it looks like there is alot taken off the carb. i wish mine looked like that.

blackdeath647

iTrader: (2)

actually, it can, if its a very small leak like the one i had it will hold idle just fine, but when i went to step on the gas it will bog down just a bit, it was actually iddling at 650 rpm. and that leak was actually from my block off plate on the back of the manifold. it was a very small hole with a bit of gasket sealer hanging from it so it would seal itself back up sometimes...very annoying to find.

my84gslrx

block off plate on the back of the manifold? is that for the acv? or somewhere else? i was told not to use gasket sealer but gasket material..

BUMBLEBEE7

iTrader: (1)

Remove the little red cap.

blackdeath647

iTrader: (2)

that should be fine i guess, i didn't have gasket material at the time, so i used some silicon gasket maker. anyways my point is, that just because i can hold good idle doesn't mean it doesn't have a leak.

darkblaze

if i am not mistaken the front barrels are the primaries they have a steady stream of fuel but the back barrels are the secondaries and there is almost NO fuel coming out of them. Try looking at the gasket for the secondary accel pump or the pump itself and see if its bad. i had the same problem and replaced the secondary accel pump and it fixed it.