After timing belt job, 91 LS400 is not starting
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After timing belt job, 91 LS400 is not starting
I just finished changing the timing belt and the water pump today. I basically, followed the steps at lexls websitehttp://http://www.lexls.com/tutorial...imingbelt.html. In addition, I also replaced the crank and the cam oil seals. One exciting episode during the job is finding out the shattered rotor in the distributor.
I finished the job and with my finger cross, I turned the key. The first two or three turns were not smooth with a few felt clicks. The rest of the turns are smoother but there were no signs of starting. I check spark plug wire orders and all possible contacts I can find.
Could it be the timing issue? I lined up the cams and the crank with the marks as much as I could before I removed the timing belt. I also corrected for the jumped one step of the timing belt by turning the cam back. When installing the belt I made sure the marks were right on. The other mechanic think I could be one rotation off at the crank, since two rotations at the crank would return the belt to the same cam positions. I don’t think so, but is there a way to check?
Could it be the distributor issues? As I posted last time, the distributor housing is all scratched pretty badly. I cleaned them up as much as I could and reused them. I am not sure if this affects the cam sensor signal.
Could there be a fuel issue? I test cranked for almost 15 times and didn’t smell gas vapor from the exhaust. If timing belt is off or ignition not firing, I have the experience of strong unburned gas smell. Could be something I may have done to cut fuel supply?
Any other suggestions would be greatly appreciated!
I finished the job and with my finger cross, I turned the key. The first two or three turns were not smooth with a few felt clicks. The rest of the turns are smoother but there were no signs of starting. I check spark plug wire orders and all possible contacts I can find.
Could it be the timing issue? I lined up the cams and the crank with the marks as much as I could before I removed the timing belt. I also corrected for the jumped one step of the timing belt by turning the cam back. When installing the belt I made sure the marks were right on. The other mechanic think I could be one rotation off at the crank, since two rotations at the crank would return the belt to the same cam positions. I don’t think so, but is there a way to check?
Could it be the distributor issues? As I posted last time, the distributor housing is all scratched pretty badly. I cleaned them up as much as I could and reused them. I am not sure if this affects the cam sensor signal.
Could there be a fuel issue? I test cranked for almost 15 times and didn’t smell gas vapor from the exhaust. If timing belt is off or ignition not firing, I have the experience of strong unburned gas smell. Could be something I may have done to cut fuel supply?
Any other suggestions would be greatly appreciated!
#2
how damaged is the dist housing? i wouldn't think a scratched housing would be a problem since it just holds the dist cap.
what does this mean? "I also corrected for the jumped one step of the timing belt by turning the cam back."
so you missed a tooth during reinstallation? did you do a full two turns of the crank pulley to see if the cams line up again?
what does this mean? "I also corrected for the jumped one step of the timing belt by turning the cam back."
so you missed a tooth during reinstallation? did you do a full two turns of the crank pulley to see if the cams line up again?
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Hi! Timmy, you will have to see my thread http://https://www.clublexus.com/forums/ls400/679507-i-may-have-damaged-the-engine.html to see the details. Sorry for the confusuions!
Last edited by vindell; 03-22-13 at 05:52 PM.
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Thanks! That would provide a check for TDC. I have a question on the rotor position. LEXLS said to "Align the protrusion of the rotor with the groove of the camshaft timing pulley". With the 2 fixing screws, the rotor tip can take up only one of two positions. Either one would not really pointing to the "groove of the camshaft timing pulley.
Last edited by vindell; 03-23-13 at 12:52 AM.
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