I am having ignition problems with my TPI setup. I need help ASAP, I need to get this truck on the road today if possible.

I pulled my distributor to replace my pickup coil and my reluctor ring (had a small crack). I marked everything when I pulled it out. It still didn't seem to want to drop in in the same place. So I manuallly found TDC and set the distributor. (I found TDC on the balancer and with a spark plug gauge)

I start the truck and timed it to 8* BTDC. The motor runs fine as long as the timing circuit is disconnected (like when you time the motor) When I turn the truck off and reconnect the circuit and start the truck it runs horribly and then dies. I can't figure out WTF is going on.

I replaced my module, ECM, and EST but none of it helped any. I am not 100% sure my spare EST is good but I know that the module and ECM are good.

I went looking for loose wires and things but I am at a lose. I can't figure out anything to get this thing to run right.

Why would the motor idle fine with the computer timing disconnected and not with it connected. It ran perfectly before.

I am getting no codes except when I turn the ignition circuit off I get 42 but that is normal.

Thanks
Harley

P.S. The setup is a 88 MAF TPI on a stockish 350. Painless harness.

 

Nothing?

If you have any ideas I am game. I need to get this thing running again ASAP. Thanks

Harley

 

If you can, monitor the timing when you reconnect the EST bypass. Try to see just how much advance you get once it is reconnected. You should be able to connect and disconnect the bypass on the fly - no need to shut off the engine.

I'm thinking that the base timing may be too advanced, possibly from a slipped balancer ring timing mark or aftermarket timing cover and tab that are not at true TDC. If that's the case, try setting the base timing closer to 0° and reconnect the EST.