1998 5.7 liter can not Time

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1998 5.7 liter can not Time - 4/9/2008 7:24:26 PM    NoBrakes   Posts: 20 Joined: 4/9/2008 Status: offline Does anyone have any idea's that could help me?  I pulled distibuter without marking it when I changed intake gaskets.  I reinstalled distributor with TDC & rotor pointing at the little 8 .  No luck -- I do have 2 lines on my balance -- one is a manufactured groove and the other is a white chalk line.  The white chalk line seems closest to TDC.  I also have 2 white marks on bottom of distributor near rotor. One of the marks is next to the 8 on the flat spot of distributor and the other white mark is right of camshaft sensor plug. I have tried moving my distributer back and forth all over one gear at a time and I can not get it to fire.  I read that the bottom of my distributer at the gear there is a half drilled hole that is supposed to line up with a white mark near that end of distributor shaft. But I do not have a white mark on there.  I bought new cap and rotor -- I then had my wife turn the motor over with the ignition and I hear a spark sound.  Come to find out that the new cap was arking before I even set it on top of rotor.  I reinstalled old cap and tried the same thing ( cap off and turned motor over using ignition - this time no spark so I am using the old cap for now)  Hopefully someone has an idea for me -- I am thinking about checking compression on all cylinders next?  Could I have jumped a timing chain link? I hope not. Post #: 1

RE: 1998 5.7 liter can not Time - 4/9/2008 8:05:50 PM    northey87 Posts: 841 Joined: 10/17/2007 Status: offline Welcome to the forum!!! I always hate taking out the distributor for this very reason. I would just keep playing with it. Someone here should be able to help, just hang in there. _____________________________ ''95 1500 Silverado, 350, flowmaster Force II exhuast, S&B CAI. Get your nominations in for the August ROTM!! http://www.chevroletforum.com/m_72947/tm.htm (in reply to NoBrakes) Post #: 2

RE: 1998 5.7 liter can not Time - 4/10/2008 7:17:02 PM    NoBrakes   Posts: 20 Joined: 4/9/2008 Status: offline Update on my problem's  -- First " Thanks Northey for the encouragement "  What I did !! I checked my compression on all cylinders (cold) and they were between 160 & 175 -- I think that is ok book says 150psi 20dp -- I then cleaned all plugs and installed checking all my wires -- Then I set TDC -- I used Manuf. groove this time and set rotor at the 8 a little ahead ( I know I did that before ) Walla presto it STARTED!!!!  Now I need to figure out how to make it run a little better --  purrrrs good at 1000 but higher and lower it is not.  I hooked my computer to it and found 3 codes 102 , 122 , and camshaft positioner I forget #.  I reset codes and 102&122 came back .  Are they on because my timing is still off or are they the problem.  what should my #1 piston timing be ? I think the computer said 20.  Should I just run my truck a little while and it will clear itself out or should I adjust time one more gear?  Not sure witch direction to go. (102= Low input --- Mass air Flow) (122= Low input --- Throttle position sensor) (in reply to northey87) Post #: 3

RE: 1998 5.7 liter can not Time - 4/11/2008 7:00:04 PM    NoBrakes   Posts: 20 Joined: 4/9/2008 Status: offline Update to anyone that wants to read my sorrows.  LOL  ---  I still have not been driving my truck ---  I started troubleshooting it again today and found the mass air flow sensor code had gone away.  "Hopefully it don't come back"  I still have TPS code -- so I started checking voltages and sensor is getting 5 volts but nothing coming back. I tore it apart and cleaned -- was wet an dirty inside of TPS sensor (which I see is just a potentialometer of some sort) but something is not working inside of it. (It does work good to ground) but not to  the computer. I checked napaonline and found them from 30 to 50 dollars. I read in the book and it says that the TPS sensor if broke can give an unstable idle so I hope that is the problem  now.  I have the camshaft postion sensor come back into alarm code again. Is this sensor going bad or is my timing still not right?  Will it go away when I install a new TPS?  (in reply to NoBrakes) Post #: 4

RE: 1998 5.7 liter can not Time - 4/13/2008 8:10:41 AM    NoBrakes   Posts: 20 Joined: 4/9/2008 Status: offline FINALLY  I have never had a problem with my truck that took me a week to fix  lol -- I changed out the Throttle postion sensor and that was the problem -- The mass air flow sensor code was on because I had the damn thing unhooked before. and then I advanced my timing one gear and my cam postion sensor code went away --- yah I am done -- Does Anyone now What the #1 cylinder timing advance should be ? My computer says it is around 20 at idle then it goes up to 28 degrees while i am driving -- But my haynes manual does not go in depth that far.    --- Signin Out --- (in reply to NoBrakes) Post #: 5

RE: 1998 5.7 liter can not Time - 4/25/2008 1:46:50 AM    hquick Posts: 53 Joined: 4/24/2008 Status: offline Only way to set the timing on these is with a scanner. Must be +/- 2 deg. Have to loosen dist hold down, set scanner to scan the CMPRET...rev to 1000rpm each time the dizzy is adjusted until you get the correct reading(above)...then tighten clamp.  _____________________________ Regards Howard (in reply to NoBrakes) Post #: 6

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