im lost for ideas
Thread Starter
|
Postmaster
Joined: Sep 2004
Posts: 3,166
Likes: 2
From: wi
im lost for ideas
over the weekend i installed a biger cam,and a fresh brand new carb.same carb just a new one. motors the 429 in my sig 10;1 d2oe-ab heads. cams a .564 intake and .582 ex with a split duration 276 in 284 ex and all matching springs,threw the stealth back on and fire it up. i run it for 20 min at 2000-2500 to run in the cam.then change oil and took it down to the nieghbors(about a mile round trip) still nothing wrong runs great. well this afternoon i took it to the bar to get food still run good onthe way out it started just fine backed up and when i put it from revers to low(manual shift c-6)it poped back threw the carb and died.ok it started up and run fine for about 300 yds and started popin again,barly made it home.ive swaped feul pumps, coils(noticed my new one was arcin)cap and rotor,ingintion boxes pretty much every thing exept carb and dist.if the power valve blew out that shouldnt make it mis real bad should it? pop back threw carb not ilde. im up for any ideas. oh i even checked the feul psi and its around 7-8 lbs at the carb,even the timing didnt move. no bent pushrods ect.havnt beet on it yet either
Postmaster
Joined: Aug 2003
Posts: 4,172
Likes: 1
From: Oakdale,Ca.
I thought all the newer Holley's had some sort of blockoff that eliminated blowing the PV on backfires? I could be wrong...but I know there used to be a kit you could put in them. I've never blown a PV, so don't know what the symptoms would be.
I'd look into the ignition system for sure though to see why it's firing at the wrong time.
I'd look into the ignition system for sure though to see why it's firing at the wrong time.
Elder User
Joined: Jun 2004
Posts: 800
Likes: 6
From: Edmonton, Alberta Canada
check your ignition wires to see if one touched the headers/exhaust and is arcing.
Also recheck all the manifold bolts as they can loosen off due to intake gasket compressing.
my 2 cents
Rgds
Mike
Also recheck all the manifold bolts as they can loosen off due to intake gasket compressing.
my 2 cents
Rgds
Mike
Thread Starter
|
Postmaster
Joined: Sep 2004
Posts: 3,166
Likes: 2
From: wi
im startin to think i have 3 bad coils and 3 bad ignition boxes.its definatly in ignition no spark. i thought mabe the previous owner might have messed up the wirin(its acted up in the past)so i just rewired it the rite way and still nothin.so i know the dist is good and the wiring is rite that should only leave coil and ignition box rite? i have power comin to the coil and the box
Thread Starter
|
Postmaster
Joined: Sep 2004
Posts: 3,166
Likes: 2
From: wi
okfinaly got the new wiring all solerd up and heat shrunk and it fired up thats a good thing. but the bad news is it still pops and mises the vacum gauge goes nuts from 5lbs all the way up to 15lbs would an intake gasket not sealed rite do this?and if so why would it just go to leaking after half hour run time?
Post Fiend
Joined: Sep 2006
Posts: 14,325
Likes: 14
From: Island Southeast Alaska
My FE in The 66 went through 3 cams at brake in. 2 wiped out lobes and the last broke. WTF I say and call a speed shop that recommended this cam for this build. He told me to remove one of the dual springs from every valve. Than run it with no load at 1800/2000 for 45 minuets after warm up. Than reinstall all springs and go for it. That was 15 years ago and still running today. No I don't remember what the cam is. Just my .02 cents
Elder User
Joined: Mar 2007
Posts: 626
Likes: 0
From: Rome, GA
Check you push rods and see if one bent due to the increased spring pressure. I put Manley hardened steel push rods in mine when I built it. You might want to run back through the rocker adjustments and make sure youdont have one that has tightened itself down. What rockers are you running and do you have locking nuts on them?
Trending Topics
Thread Starter
|
Postmaster
Joined: Sep 2004
Posts: 3,166
Likes: 2
From: wi
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Post Fiend
Joined: Sep 2006
Posts: 14,325
Likes: 14
From: Island Southeast Alaska
Only seen similar once on a 351W that had the heads and deck shaved. The intake was then to tight and having to force it down with the bolts it got cut and smashed the gaskets. Once the intake was milled to match it worked fine.
Elder User
Joined: Jul 2006
Posts: 688
Likes: 0
From: right here in michigan
was it the performance fel-pro or the standard replacement gaskets?i've had problems with the performance ones and come to find out they aren't intended for long term (example: street ) use.i put mr gasket ones on from now on.