I have a 1986 Camaro 4BBL.

No cats, great spark, and great fuel AND COMPRESSION. New timing chain.

Anyhow., parked the car last night and now it just cranks.


Found out the Ignition Module 7 pin in the dizzy was bad, replaced it, it tested real bad !

The Dizzy is new, pickup and coil, plugs wires, cap and button new and all connectors great, the module was old.

Replaced the Module and the same result, the car cranks and tries to catch but will not.


The guy at autozone told me these modules will wipe a ECM out in a heartbeat on my year of car when they have severe faults since they tie to the ecm directly.

Is this true and do I need a new ECM?

 

I've never heard of ignition modules taking out the ECM. But anything is possible.

Since this is a carb setup you don't even need an ECM to run the engine. Find the EST/BYPASS connector and open it. This is the same connector that gets opened in order to set the distributor timing.

Opening that connector will take the ECM out of the picture. Now try to start the engine. If it doesn't start, it isn't because of the ECM.

RBob.

 

where is the EST bypass at on this car?

 

Look around the distributor, then around the area of the A/C box under the hood. It should be a single wire connector, probably tan with a back stripe. It usually runs out of the loom and then back into it. With the connector residing in the open.

I'm not positive about the location for a CCC car. However, that is what GM did on the EFI cars.

RBob.

 

I see a single wire to the dizzy with a rubber boot, its a pull apart located by the passenger heater motor box.

Whats weird, is that autozone website, says to set the timing, to unplug the big 4 wire harness to the dizzy lol. Im assuming this single wire is what im after and unplug it, or the big 4 wire connector like autozone says to do(TO RID THE ECM Temporarely.)

 

What color is that single wire? Sure sounds like the power lead to the underhood light. Did you actually check for spark? Then check for voltage to the coil. The four wire connector is the one to unhook for a timing check with a carb.

 

I agree with the 4-wire connector. Just took a look at a '85 harness and didn't find anything like a separate EST/BYPASS connector on it.

RBob.