Yesterday on the way home from work I was driving and allof the sudden while my foot was off the gas going about 60 my car died. Coasted off the road and when I started it again it would idle lower and lower and then die. However if I keep on the gas it would run fine so I hade to hit it in to neutral any time I was hitting the brakes or turning, and somehow got it home, engine temp loved it never above 200 with the motor at least at 1500 rpm. Any how I got it home and let off the gas pedal and it just died again. I did not see any loose hoses were vaccume is concerned there is new gas puddles on the intake in the front. It seems to be the little 30cc pump. Any ideas carburetor wise I am definately not a wiz on carbs but the leak seems to coinside with yet another new problem. Also this motor has about 300 miles on it what kind of stuff do you guys do to maintain it at this point 396 .60 over stock size 325-350 horse spead pro forged pistons ultradyne hydraulic roller 284/292hr10 218/226 @ .05 .6 lift intake and exhaust 110 lobe separation, 215 heads edelbrock rpm, 750 holley vacuume secondaries, turbo 400 ati treemaster 8" 2000-2500 stall powertrax posi and 3.90 gears freeway is not to fun anymore, short game much better, I am pretty sure I will be in the 12s on street tires. I took it to the track a couple weeks ago and ran 1 run not messing around with jets or timing or tire pressure and ran a 13.18 on 35 psi general ta road huggers somehow with a 1.88 60 ft previous best before new cam and converter was a 2.15 sorry for babbling. Just trying to tell ya my combo and now I wont shut up.
Anyway, maitenance at this point?


thanx
Jacy Ronhovde

Mine would do that when my good ole holley was having probs.Vacumn leak, Filter,Fuel feed problem, stuck thingy in carb, pressure to high. Holleys are funny. Now if you have an Edelbrock I don't know what to tell you, my friends tell me you set the idle on an Edel and drive it 900,000,000 miles. I like holleys though.Also if it is a holley and it's been sitting the seal for acc. pump will rot.

thnxs it is a holley so I guess I will start trying to track some of the ideas down you have given me. Starting with the accelerator pump gasket.

thank you

Will it run like that if you make the acc pump nut too long? What I am saying is can the diaphragm be torn by adjusting the screw?

MaTt

like i said I do not mess with carbs that much this is the first problem I have had with it in 3 years and 10,000 miles. I have not even messed with any screws other than the idle adjustment and that was a while ago. I will probably take it off in a little while here

Sounds like a vacuum leak. I'd pop off all of the lines and plug them in some way that you are sure there is not a leak, and then see how it runs. Unless you are dependant on vacuum advance for timing. Too actually shut off a running car would be a leak that you can hear. So, maybe the motor is starving for fuel.

Something this sudden (and at idle) usually isn't a lack of fuel.

My holley is doing good after about the same duration of use. Does yours have an electronic choke? Maybe it's power source went away and closed the choke-butterfly?

Spray it with some carb cleaner, and then check your float levels.

don't just up and yank it off just yet.

I had the same problem with my Holley, I eventually turned up the idle, to keep it going, BAD IDEA my engine caught on fire! graemlins/angry.gif a guy stopped and put it out, after that, I decided I wanted to change it, baught an Edelbrock and I LOVE it, I still have the Holley though, I am going to rebuild it and use it for race graemlins/thumbsup.gif

I have had that problem.. my gas tank does not vent correctly. When the gas shuffles around alot, or fill it on a hot day, big-time pressure builds up and the car starts to idle bad and run bad, even die. If I stop and open the gas cap, woosh (careful here..), then great idle, great running..

Matt

hey guys thank you for all the ideas, I got out there today and was pretty sure it was going to have something to do with the accelerator pump because that is were the new pool of gas was forming. I pulled it off took it apart and found that one of the screws that hold the diaphram was stripped out, funny thing is I have never taken that screw out before. Replaced the diaphram on a spare bowel and now it is back in buisiness. BB-mike if you see this I tried to e-mail you with a question. If ya get a chance to check it out I would really be greatfull.

Man I love this website,

thanx
Jacy Ronhovde