Toyota MR2 Message Board - View Single Post - 5S-FE MK2 Non-Turbo Engine 5SFE Advanced Ignition Timing Problems

Sh0ty · 04-20-2009, 10:53 PM

Hey, I read that advancing ignition timing to 14 degrees BTDC would give me a slight power boost so I tried it out today. The timing gun I used had a dial to select 0-60 degrees, but I wasn't sure how that worked, so I left it at 0. I couldn't locate any marks on the camshaft pulley, and it didn't really seem to stand still, just rotate very slow. I decided to give the dizzy a tiny clockwise turn anyway to hopefully raise it a degree or two, and have not encountered any detonation. I do however have slightly erratic idle (900 drops to 800, slow rise to 900, drop to 800 etc). I made sure I was connected to the first spark wire (tried the other 3 as well) and I jumped the right connection in the diagnostic box (E1 to TE1).

Does anyone have any advise to figure out if my belt even has a timing mark, and if so, how I can get it to properly sync with the firing of my first cylinder?

04-20-2009, 10:53 PM	#1 (permalink)
Sh0ty Armchair Racer Join Date: Aug 2008 Location: Novi, MI Posts: 1,273 Thanks: 22 Thanked 57 Times in 54 Posts My Google Map iTrader Rating: (3/100% )	5SFE Advanced Ignition Timing Problems Hey, I read that advancing ignition timing to 14 degrees BTDC would give me a slight power boost so I tried it out today. The timing gun I used had a dial to select 0-60 degrees, but I wasn't sure how that worked, so I left it at 0. I couldn't locate any marks on the camshaft pulley, and it didn't really seem to stand still, just rotate very slow. I decided to give the dizzy a tiny clockwise turn anyway to hopefully raise it a degree or two, and have not encountered any detonation. I do however have slightly erratic idle (900 drops to 800, slow rise to 900, drop to 800 etc). I made sure I was connected to the first spark wire (tried the other 3 as well) and I jumped the right connection in the diagnostic box (E1 to TE1). Does anyone have any advise to figure out if my belt even has a timing mark, and if so, how I can get it to properly sync with the firing of my first cylinder?