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my 401 ?where did i go wrong |
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odd401 
AMC Apprentice 
Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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 Topic: my 401 ?where did i go wrongPosted: Oct/25/2014 at 5:10pm |
 im trying to figure out where i went wrong?my 401 has no power stab the throttle and run up to 5 grand just seems like it doesnt want to go,out of gear stab it and will go to 6500.put a holly 750 vac,secondary on it no change from the edelbrock avs.i gasket matched intake and exhaust,smoothed intake runners on airgap,removed cast flaws on heads.new cam and lifters,roller tip rockers,main rod and cam bearings,rings,timing chain,distributor,cam and dist.gear,valley oil line and external line to the cam,dist gear.mew balancer and flexplate.over 3 grand spent.is it possible the porting i did is the cause.i kept the porting minimal,first time attempt,left the floor alone,should i rough the walls on intake?made them pretty smooth.im at a loss,it ran pretty good before this,it would smoke 35 inch tires all day.wont even break loose let alone burn them.pcv valve also sucking oil,waiting for a catch can and 670 truck avenger carb.any suggestions?thanks |
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amx2bfast
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Joined: Aug/07/2013 Location: middlesex nc Status: Offline Points: 217 |
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Posted: Oct/25/2014 at 5:34pm |
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you may have put the dist gear on 180 off. It will change the phase timing of the dist.may have to remove pin and turn it 180 degrees. if I am wrong on this, feel free to tell me. I think the rotor points to a dot on the gear. I will look tonight when I get home
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1975 gremlin
1973 javelin 1976 pacer wagon |
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scott
AMC Addicted 
Joined: Jul/10/2007 Location: Wildwood Pa. Status: Offline Points: 3500 |
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Posted: Oct/25/2014 at 5:39pm |
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If anyone is going to answer you, they may want the backstory posted in your other threads on this engine:
http://theamcforum.com/forum/truck-avenger-carb_topic64698.html http://theamcforum.com/forum/401-issues_topic64668.html http://theamcforum.com/forum/401-rebuild_topic64485.html http://theamcforum.com/forum/oil-thru-pcv-valve_topic64628.html http://theamcforum.com/forum/oil-pressure-drop_topic64563.html http://theamcforum.com/forum/flowkooler-water-pump_topic64553.html http://theamcforum.com/forum/here-we-go-again-401-rebuild_topic64247.html |
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odd401
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Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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Posted: Oct/25/2014 at 8:23pm |
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i didnt do the work,from my experience,gear is on right.machine shop failed,now im fixing the lack of attention to detail.pcv issue is still happening,shop owner told me to try a moroso pcv grommet,didnt work,more oil in carb.un hooked it,plugged carb fitting,secondaries are not opening,air screws all the way in and starts to stutter?still not running right.could it be a manifold leak? i need to get this fixed,i thank you for any tips.advice,knowledge.
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gremlinsteve
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Joined: Dec/16/2008 Location: houston Status: Offline Points: 884 |
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Posted: Oct/25/2014 at 8:24pm |
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Best way I know to spin a bearing, stab the throttle and run it up to 6500 with no load on the engine.
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401jim
Supporter of TheAMCForum 
Joined: Jan/07/2012 Location: Brunswick,Ohio Status: Offline Points: 793 |
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Posted: Oct/26/2014 at 5:42am |
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Chances are you may need to look at the cam timing. if you missed a tooth it will act just like you are telling us. That's my story and i'm stickin to it!
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Oct/26/2014 at 5:51am |
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Your secondaries are not opening? That needs to be fixed for sure.
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401MATCOUPE
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Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367 |
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Posted: Oct/26/2014 at 5:56am |
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On the oil in PCV, are you sure you have metal pan on bottom of intake????? Are you using a stel shim valley pan gasket??? Both of them keep the oil out of the PCV...
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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amx600rr
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Joined: Jan/26/2014 Location: Florida Status: Offline Points: 420 |
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Posted: Oct/26/2014 at 6:13am |
And make sure the carb linkage has the carb at FULL OPEN position when gas pedal hits the floor. |
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odd401
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Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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Posted: Oct/26/2014 at 8:57am |
 they didnt install the valley pan gasket,just the edelbrock gaskets,he told me the valley oil line wont clear the valley pan,i made them send me the gaskets,im done with them ,ill do it myself.and see if they actually installed it,when i pulled timing cover off the first go around,timing marks were right on,he said he degreed the cam and was within spec,i switched the advance springs and it actually spun the tires,still needs work,pcv issue,trying the reverse flow today,hope it works,thanks for the advice |
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jcisworthy wrote: