S13 Sr20 Timing Help!!!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SRprelude · 02-12-2006, 11:58 AM

first off i blew my sr a few months ago. I just rebuilt my SR to OEM spec, except for using CP .020 pistons. The timing chain lines up with its marks at TDC, and the CAS (cam angle sensor) is right on.

BUT, when I was timing the car it runs like Poo at the 15 degree btdc notch (2nd white mark from the right to left). Thinking it might be off, I tried removing the CAS and advance/retard it one tooth......but that made it run even worse. I did use my FSM, and fiddled with the idle adj. screw as well.

However, when i set it to the timing mark furthest to the right, 20 deg. btdc it feels good and powerful. Why is my car not wanting to time at the proper mark? could it be a Vacuum leak (couldnt find any), a bad timing light? ( mine is not adjustable, just a new generic autozone light) God forbid, could my chain be off a tooth... when the links line up at TDC? Ive been busting my ass trting to figure it out. Im lost, PLEASE HELP!!!!! Experienced individuals only!!

car info:
s13 redtop SR
CP .020 pistons
all other internals are stock
T25
FMIC
fuel pump
300z f. filter
K&N filter
3 inch exh.
etc.... etc....

02-12-2006, 11:58 AM	#1
SRprelude Zilvia Member Join Date: Mar 2005 Location: Huntington Beach, CA Age: 41 Posts: 161 Trader Rating: (5) Feedback Score: 5 reviews	S13 Sr20 Timing Help!!!!! first off i blew my sr a few months ago. I just rebuilt my SR to OEM spec, except for using CP .020 pistons. The timing chain lines up with its marks at TDC, and the CAS (cam angle sensor) is right on. BUT, when I was timing the car it runs like Poo at the 15 degree btdc notch (2nd white mark from the right to left). Thinking it might be off, I tried removing the CAS and advance/retard it one tooth......but that made it run even worse. I did use my FSM, and fiddled with the idle adj. screw as well. However, when i set it to the timing mark furthest to the right, 20 deg. btdc it feels good and powerful. Why is my car not wanting to time at the proper mark? could it be a Vacuum leak (couldnt find any), a bad timing light? ( mine is not adjustable, just a new generic autozone light) God forbid, could my chain be off a tooth... when the links line up at TDC? Ive been busting my ass trting to figure it out. Im lost, PLEASE HELP!!!!! Experienced individuals only!! car info: s13 redtop SR CP .020 pistons all other internals are stock T25 FMIC fuel pump 300z f. filter K&N filter 3 inch exh. etc.... etc.... __________________ Cool story Hansel.......