BenH
Well-Known Member
So I have a very freshly built 440, the short block assembled at a reputable machine shop, heads resurface at another. Before I get into worrying about whether or not things are square and machined correct from that perspective, I want to see if anyone can bounce me some ideas for what the problem could be, maybe I've missed something.
It will start and run fine, revs up great, etc. But when it first starts it needs to warm up and this requires messing with the idle speed til it's hot for a steady idle, so I figure vacuum leak. The second and more important issue is that it runs fine in park and neutral, but immediately dies in reverse or drive. Holding the gas pedal a bit enables you to keep it running in forward or reverse gear, but the tires bite into my gravel driveway every time I do that so I'm tired of doing that. So this makes me think timing, or vacuum leak.
It's kind of an aggressive build I guess, 510 cam, new JE higher comp pistons, 6 pack rods, just a 750 vac secondary Holley. Initially it had an old torker intake that was suspect so I put a new performer RPM on it. New valley pan etc.
So I've checked the timing, checked for leaks, replaced spark plug wires, had Holley warranty me a new carb and checked the bowl levels, the mixture settings, new intake as stated, it is a points system with a brand new rebuild on the distributor and all the ignition seems fine, it runs great once it's gets into rpm.
Throw me out an idea, I'm getting pretty tired of this thing.
It will start and run fine, revs up great, etc. But when it first starts it needs to warm up and this requires messing with the idle speed til it's hot for a steady idle, so I figure vacuum leak. The second and more important issue is that it runs fine in park and neutral, but immediately dies in reverse or drive. Holding the gas pedal a bit enables you to keep it running in forward or reverse gear, but the tires bite into my gravel driveway every time I do that so I'm tired of doing that. So this makes me think timing, or vacuum leak.
It's kind of an aggressive build I guess, 510 cam, new JE higher comp pistons, 6 pack rods, just a 750 vac secondary Holley. Initially it had an old torker intake that was suspect so I put a new performer RPM on it. New valley pan etc.
So I've checked the timing, checked for leaks, replaced spark plug wires, had Holley warranty me a new carb and checked the bowl levels, the mixture settings, new intake as stated, it is a points system with a brand new rebuild on the distributor and all the ignition seems fine, it runs great once it's gets into rpm.
Throw me out an idea, I'm getting pretty tired of this thing.