Re: Stumper. WTF. New one to me. Anyone?

[Gerry Reichelt <reichelt@telepath.com>]

At 19:33 05/12/99 EDT, Shawn C Meze wrote:
>Heres my newest dilemma that's been in the works for about 3 weeks now. 
>
>Driving down the freeway, (Usually 20 miles or more.) exit the freeway
>and while on surface streets the car shuts off. 
>Its also happened to me on the freeway. Cuts out like its got water in
>the fuel. Clears out and runs fine. (Well, as fine as it can run with 2
>bent exhaust valves. The new head gets picked up on friday.)
>Its recently happened to me while pulling into a parking spot. I can
>crank and crank and it wont start. The tach doesn't move, usually the
>tach will bounce slightly when you crank it over. Nadda. 
>
>Symptoms:
>
>Tach drops to zero.
>Immediate loss of power.
>Power loss id usually for .5-2 seconds but it usually keeps on running. 
>
>
>Tach drops to zero- That tells me that the ignition is cutting out. I
>cant really hear the fuel pump so I cant say if its running or not. I say
>the fuel pump is running because it runs again after a second or two and
>most of the time there is a loud as a gunshot -pop-, sometimes 2 pops in
>quick successions.
>
>I replaced the fuel pump relay and it didn't help. Then I used my trusty
>jumper wire and it started. I think that was quite by accident. I put in
>the old relay for my uneventful trip home. However when I got to the
>driveway and went to restart the car, it wouldn't. Reinstalled the jumper
>wire (I could hear the pump run) but it didn't start. Messed with the
>coil wires. Nadda. Just let it sit for a few minutes and it started up
>again. 
>
>Is this the coil going bad? Maybe its getting hot enough for it to shut
>off? Dunno. 
>I disconnected my rev limiter and my coil amp thinking one of the two
>might be causing the problem. I get the feeling its possibly the coil,
>but probably not. Or its the ignition brain. One of the two. 
>
>Ideas?
	Hall sender, ecm, Primary coil wire, relay plate/fuse block? Don't
remember if my bad Hall sender kept the tach from registering rpm's when
cranking.
Gerry

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