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October 11th, 2007, 10:05 AM
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#1 |
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Newbie
Join Date: Jun 2006
Posts: 26
 iTrader: 0 reviews
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4.6 SOHC timing...
ok, i have a dumb question but i have to ask before i tear the front end off...
I know that when you time the 4.6 your crank gear marking should be at 6 oclock and #1 piston should be at TDC... So here is my dumb question: Is it possible to have the crank gears at 6 oclock and #1 not be at TDC??? |
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October 11th, 2007, 10:41 AM
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#2 |
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mm's nitrous mod
 
2000 mustang gt
11.79@115.83 (old set up)
Join Date: Oct 2006
Location: N.W. AR
Posts: 12,430
 iTrader: 8 reviews
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not if you are looking at it correctly. it is all in a fixed position. the cams will change every other revolution, but not the crank.
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October 11th, 2007, 10:56 AM
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#3 |
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Newbie
Join Date: Jun 2006
Posts: 26
iTrader: 0 reviews
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so then as long as my crank gears are at 6 oclock then #1 should be at TDC. I ask because after putting everything back together my car will not startup and it's really presenting as a timing issue. I have fuel, spark and air. The only thing I don't remember doing is checking for TDC on #1. The motor will spin and it tries to keep going but then just kind of dies. best I can describe it.
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October 11th, 2007, 11:06 PM
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#5 |
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mm's nitrous mod
2000 mustang gt
11.79@115.83 (old set up)
Join Date: Oct 2006
Location: N.W. AR
Posts: 12,430
iTrader: 8 reviews
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probably cam timing issues.
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October 12th, 2007, 09:55 AM
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#6 |
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Newbie
Join Date: Jun 2006
Posts: 26
iTrader: 0 reviews
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How would i get it 180* off?? That did cross my mind. The motor was originally 180 off.
I was told at one point to disconnect the cam position sensor and that would put the car in a default limp mode and would at least tell me if something was screwy with the cams. I tried it with no success. |
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October 12th, 2007, 10:11 AM
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#7 |
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mm's nitrous mod
2000 mustang gt
11.79@115.83 (old set up)
Join Date: Oct 2006
Location: N.W. AR
Posts: 12,430
iTrader: 8 reviews
|
if for some reason you had the crank of the cams exactly opposite of what they were suppose to be, they ill be 180 off.
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October 12th, 2007, 11:10 AM
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#8 |
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Newbie
Join Date: Jun 2006
Posts: 26
iTrader: 0 reviews
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yeah that didn't happen. I'm just scratching my head at this point.
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October 12th, 2007, 12:40 PM
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#9 |
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Newbie
Join Date: Jun 2006
Posts: 26
iTrader: 0 reviews
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some quick history that might help... I guess my problem must be somewhere else maybe electrical.
I had put in a pi swapped 98 motor. the guy who assembled it put the crank trigger wheel on backwards so it busted a timing chain and valves. the car did run with the bad valves after replacing the timing chain...it just ran like poop. I pulled the damaged head and took it to the shop. After I reassembled everything I started having this problem. the motor turns over but will not stay running. it's like it chokes. I decided to put the old motor back in just to eliminate anything mechanical with the motor. i know i'm getting fuel and spark. timing has to be set I followed the procedure to the 't'. Could the car not be delivering enough air? when it tries to start i have the throttle body pretty wide open. at this point the intake, computer, sensors and starter are the only things that are the same. |
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