The new roller cam is great in my 454, has lots more low end and overall power. It ran good at first, idle set at about 900...but during a run to my local cruise place, I got on it hard...ran great, but suddenly started running super rich, and stalled when I came to a stop...I have done everything I can think of to fix the problem, but its still there...It wont idle below 1400 now, and even there, it runs like crap...still runs strong on the road, although smells really rich...I checked float levels, checked for dirt in the needle and seat area, set idle mixture, and did all this on 3 different carbs...it had a 750 Holley DP when it happened, and I switched to a 750 Edelbrock, same problem...then a 750 Holley Vacuum sec.....same problem again...I put in new plugs, new wires, tried a different HEI distributor, (known good one) set the ignition timing, checked valve timing, took off the valve covers and cranked it over to watch everything and look for broken parts and set valve lash...no problems there. I did a compression check, all are good, 200# plus, all within 5# of each other. Vacuum is about 9"... I have the fuel pressure set at 4# on the gauge...I had it at 7 originally, but it made no difference. It's an Edelbrock mechanical pump running thru an Aeromotive regulator. Im thinking of trying a stock pump and running it right to the carb just to eliminate that part, although if it shows 4# on the gauge, it should be 4#.. But is it?? I also checked all my hoses for a vacuum leak, but I thought with a vacuum leak, it would idle high, cause it's lean...mine is definitely rich, very rich..a little black smoke and it burns your eyes...The only thing I havnt tried is pulling the intake to see if there is a problem there with the gaskets, but I dont see how that would make it do what it's doing...but if you guys think the problem might be there, I'll give it a try. Im at a loss, I hope some of you can help!!!
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John
