Cam28_boy

I just got threw installing my new sportsman II heads along with some new injectors. I assembled everything according to the sevice manual. I got the distributor set just so I can get it started, so I know it should start. It cranks but won't start...I checked the coil and there is no spark...wtf. I bypassed my whole msd system and used the old coil...still no spark. Is it possible for a bad ground to cause this problem? Or is it possible that the ignition module was damaged in the removal/install process? ------------------ 1991 Z28 5.7L All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod. 1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

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Ed Maher

Are you sure you got the dizzy seated all the way. You have to properly engage the dizzy w/ the oil pump driveshaft to get it in all the way. If you don't then it's possible that your dizzy isn't moving, and if the pick-up coil doesn't see a moving reluctor, your engine is off.
Other than that, looks like you're straight up troubleshooting the igniton to find the randomly failed part.

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Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.7 @ 93.6
Stock except ported plenum and dual cats
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

age

try changing your ignition module... when Hunter and I went to start up my car after an 8 month project, we encountered a similar problem. The last thing that we checked/changed was the ignition module (luckily I had a new spare one hanging around).

Cam28_boy

Thanks for the response guys, i'm going to give both of those a try today.

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1991 Z28 5.7L
All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod.
1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

Cam28_boy

Well I found out why I had no spark...I had the connector for the ignition coil going to the manifold sensor and the connector to the manifold sensor going to the coil. Good news is I have spark now, bad news is still won't start...how do you set timing if you didn't mark the distributor?

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1991 Z28 5.7L
All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod.
1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

afgun

Here's how I did it:

Disconnect distributor connection, remove #1 spark plug. Put finger over the spark plug hole. Have someone bump starter until you feel pressure pushing air past your finger. Adjust crank position with socket/wrench until pointer is at 6 degrees BTDC as indicated on timing tab. Plug distributor back in. Reinstall spark plug. Remove distributor cap and see if rotor points near direction of #1 plug wire on cap. If not, remove distributor and reinsert, turning rotor until rotor is in general area of #1 spark plug wire. Hook timing light up to #1 plug wire. Turn ignition on. Have someone hold timing light button pressed in while you slowly rotate distributor back and forth. When timing light fires, you're in the neighborhood of 6 degrees static timing and the engine should then start.