Timing Help!
Timing Help!
Ok so i have my 5/87 300zx and ive just finished my build and motor is back in the car.Well everytime i go to set the timing it automaticly retards it to roughly 30 degrees.. any ideas on why this may be happening ??
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evildky
- Posts: 14225
- Joined: Sat Jan 31, 2004 9:23 pm
- Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW - Location: Louisville, KY
- Contact:
Re: Timing Help!
Welcome to NICO.
You just rebuilt the motor, so you are absolutely positiove that the timing belt, cams, crank and distributor are all properly in sync? Forst thing I'd do it pull the timing covers and verify physical timing. That being said, I seem to recall that to set the timign on the z31 with the stock ecu you must turn the screw on the ecu all the way to one side (I might be worng on this but the fsm details what to do to set the ignition timing and most cars require somethign be done to lock the timing before you can set it).
Does the car idle well? and at correct rpm? trying to set the timing at high rpm will cause the timing to jump around.
You just rebuilt the motor, so you are absolutely positiove that the timing belt, cams, crank and distributor are all properly in sync? Forst thing I'd do it pull the timing covers and verify physical timing. That being said, I seem to recall that to set the timign on the z31 with the stock ecu you must turn the screw on the ecu all the way to one side (I might be worng on this but the fsm details what to do to set the ignition timing and most cars require somethign be done to lock the timing before you can set it).
Does the car idle well? and at correct rpm? trying to set the timing at high rpm will cause the timing to jump around.
Re: Timing Help!
Yeah the motor is now pretty much fully built from rods to valve springs and yeah to the best of my knowledge its all right I have it assembled without the covers on so it's easy for repairs and I've set it manually at least 5 times to 15btdc and lined the cams up with the oem marks . I've read alot about the knock going bad and not advancing the car but I have replaced that. Therefore I'm stumped at the moment. And have any of you guys had troubles with the oem tensioner ?
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evildky
- Posts: 14225
- Joined: Sat Jan 31, 2004 9:23 pm
- Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW - Location: Louisville, KY
- Contact:
Re: Timing Help!
if the cover is off how can you set the timing? The timing indicator is on the lower timing belt cover which would obscure you view of the crank pulley indicator where it lines up wiht the oil pump housing. YOu also didn't specify, the car idels fine? at reasonable rpm? and you followed the fsm procedure which requires dialing the knob ont he ecu iirc.
Re: Timing Help!
I have made a special clip replicating the mark from the timing cover and I have not done that its timed manually but i do believe the ecu retards it so its Probly not setting a base how did you do that again ?
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AZ-ZBum
- Posts: 1282
- Joined: Mon Aug 04, 2003 9:48 am
- Car: 05 Nissan Murano
84 Nissan 300ZX Z31 AE
88 Nissan 300ZX Z31 Vert - Location: Phoenix, Arizona
- Contact:
Re: Timing Help!
Punctuation helps with readability. What did you just say?chrisdee wrote:I have made a special clip replicating the mark from the timing cover and I have not done that its timed manually but i do believe the ecu retards it so its Probly not setting a base how did you do that again ?