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So here's the lowdown. 1972 Chevelle four door, 307 engine w/auto trans.
Had a four barrel Holley 570cfm carb and new edelbrock performer intake sitting on the shelf for almost two years waiting for something to go wrong with my factory 2 barrel rochester. A couple of weeks ago it finally happened, I went to fire the thing up and the rochester was spewing fuel out of every crack and orifice it had, finally time to do the swap and switch to HEI at the same time.
After finding TDC (checking to make sure air was coming out of cylinder 1 as well) and making sure the original distributor was pointing to #1 on the cap I tore everything apart for the swap. HAd my buddy come over to help put everything in. Picked up GM Performance parts (MADE IN TAIWAN?) HEI distributor and installed, along with new plugs regapped to 045" and new MSD streetfire plug wires.
Ran wire from fuse block where resistance wire was on engine compartment side and went to fire up and nothing. (later find out that we need to hook up directly from IGN inside cabin side?) Hooked up carb and distributor direct to battery and still nothing, check for spark and distributor not putting out spark even connected direct to 12V. Determine we have faulty coil in distributor. SEnt back to Summit for refund and pick up MSD streetfire HEI locally.
(reset TDC)
Hooked up the MSD HEI and also reran wire from IGN inside car fuseblock. Tried to fire up, nothing still, now getting spark, also getting fuel, carb seems to be doing what it's supposed to but still won't fire up.
Double and triple check my spark plug wires and they appear to be correct. This is the current hook up I have looking at the distributor from the top and front of the car;
3 6
4 5
8 7
1 2
On the engine;
8 7
6 5
4 3
2 1
Apart from checking compression on the engine (which is my next step) is there anything anyone would recommend to check? The voltage both at the carb and distributor at crank seem to be 9.5 Volts, I even hooked up the new MSD setup directly to the battery and my cranking voltage at the carb and distributor is only 10.something volts?? Is there something obvious I am missing?
HEre's a snapshot of my setup in the works;
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Had a four barrel Holley 570cfm carb and new edelbrock performer intake sitting on the shelf for almost two years waiting for something to go wrong with my factory 2 barrel rochester. A couple of weeks ago it finally happened, I went to fire the thing up and the rochester was spewing fuel out of every crack and orifice it had, finally time to do the swap and switch to HEI at the same time.
After finding TDC (checking to make sure air was coming out of cylinder 1 as well) and making sure the original distributor was pointing to #1 on the cap I tore everything apart for the swap. HAd my buddy come over to help put everything in. Picked up GM Performance parts (MADE IN TAIWAN?) HEI distributor and installed, along with new plugs regapped to 045" and new MSD streetfire plug wires.
Ran wire from fuse block where resistance wire was on engine compartment side and went to fire up and nothing. (later find out that we need to hook up directly from IGN inside cabin side?) Hooked up carb and distributor direct to battery and still nothing, check for spark and distributor not putting out spark even connected direct to 12V. Determine we have faulty coil in distributor. SEnt back to Summit for refund and pick up MSD streetfire HEI locally.
(reset TDC)
Hooked up the MSD HEI and also reran wire from IGN inside car fuseblock. Tried to fire up, nothing still, now getting spark, also getting fuel, carb seems to be doing what it's supposed to but still won't fire up.
Double and triple check my spark plug wires and they appear to be correct. This is the current hook up I have looking at the distributor from the top and front of the car;
3 6
4 5
8 7
1 2
On the engine;
8 7
6 5
4 3
2 1
Apart from checking compression on the engine (which is my next step) is there anything anyone would recommend to check? The voltage both at the carb and distributor at crank seem to be 9.5 Volts, I even hooked up the new MSD setup directly to the battery and my cranking voltage at the carb and distributor is only 10.something volts?? Is there something obvious I am missing?
HEre's a snapshot of my setup in the works;
Good news!!Thanks for letting us know.The key is not to get frustrated(easier said than done)think it out,double check and its usually something stupid!
