im having sime problems with timing. i cant seen to get the mark to line up. i tried to plug a wire into the code thing near the fues and that didnt work. then i tried the est wire and that didnt work either. its reallly close but not exact. could it be due to my egr not hooked up properly or what thanks in advance, i wanna get this show on the road.

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.

 

You are rotating the distributor?

 

i know how to time it when the marks meet each other, my problem is they just arnt getting close enough

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.

 

What's the timing set at now, with the EST unplugged?

 

the lowest i can go before stalling is about 8* i think btdc, it times with the est conected to the point that you cant see it too about 8* before the timing tab

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.

 

I think then, that your balancer ring has slipped.

Other possibilities are mis-routed plug wires or timing on the wrong cylinder.

What I would do is bring #1 piston to TDC and then look at where the timing mark on the balancer is in relation to "0".

 

Wait a second, you need to disconnect the EST bypass connector when checking the timing, reading your last reply it seems that you're checking it with the EST bypass connector still plugged in?

 

no what i did is started the car, unpluged the wire, the car seemed to lower the idle, then i tried to time it, stalled it by letting it sit a 6* btdc, then started it again, plugged it in, and kwit. im thinking its maby a vacume leak, or maby im unplgging the wrong thing. the est wire is right next to the passangerside fender right, its tan with a black stripe im probably going to get a vacume gauge and check the vacume, i heard that could throw it off

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.

 

Well, what you're going to notice is that as you lower the timing (smaller # of BTDC through "0" and ATDC) is the vacuum will decrease. This may mislead you into looking for a vacuum leak that is not there.

Again, I'd verify the balancer ring has not slipped...could save you a lot of headache.

Ofcourse a vacuum leak could cause the problem too and is usually easy enough to find with a can of carbcleaner.

There has been talk of TBI engines needing a lot more base timing with non-stack cams, have you tried the TBI board yet? You may want to list the cam specs on the Crane you installed.

 

ill try the tbi board, but i had the right wire right thanks for the reply

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.