just did the plugs cap rotor thing on my 305 tbi. went to reset and bump up the initial timing, no timing mark, no degree tab, nothing. where are they? there has to be something to use as a setting mark.

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'92 firebird t-tops
305tbi,670cfm tbi, 2 1/2" Dynomax catback, 9x3 K&N open element

 

Lood almost straight down along th efront of the engine just to the driver's side of the water pump, kind of between the water pump and the power steering pump; there's a little round tube looking thing down in there, that's your timing mark.

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"So many Mustangs, so little time..."
ICON Motorsports

 

yeah, I see that, so I assume that you can't use a standard timing light?

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'92 firebird t-tops
305tbi,670cfm tbi, 2 1/2" Dynomax catback, 9x3 K&N open element

 

Mine has a timing tab right in front of that tube. The tube is a universal thing that some cars use for the ECM for timing. It holds a probe. I think techs use it for some diagnostic equipment too. Yours doesn't have the tab? It must have been removed for some reason. It should have some teeth on it. The closest to the little tube being 0 deg. and for every point, whether in or out, is 2 deg. progressively. I hope you find it. Otherwise you'll need to use just that tube and I can't imagine it'd be easy. Wish I could help more.

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92 RS w/t-tops 305 TBI Auto.
170K miles and don't burn a drop o'oil
-K&N Truck filter #1500 w, open ele.
air cleaner
-Dynomax 2 1/2" cat-back
-B&M TransPak
-Jet Stage2 Chip
-180* T-Stat w/ 185* Fan Switch
-JVC CD--Alpine speakers & 4ch. amp
Rockford 2ch. to 2 MTX 12" subs

 

alternatively.. you could remove the spark plug from cylinder one and set the rotor between the 2nd and 8th cylinder firing positions (i believe... thats the correct position.. check a haynes manual) stick a pen into the plug chamber.. manually turn the drive shaft so the piston is at top dead center. viola!. after doing this. climb under the damn car and file a new timing mark into the drive shaft balancer and something else so they align.

 

Yes you can use a standard timing light with the marks behind the water pump.

Clean the tab with some carb cleaner, there are timing marks there along with the tube.

The big "V" is TDC.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...

R.I.P. #3
"He can see air"

[This message has been edited by Engineboy (edited June 17, 2001).]