Calixbwsx

I have a 89 Iroc tpi 305. I been doing alot of work to the engine and the car runs great but I was at a stop light when the car just shut but I put it in park and turned right on but the engine light did not stay on. So I went to check for codes and nothing came out so I had my mechanic test my ECM but he couldn't get any info so I'm wondering what else can I do to see if I have a bad ECM or connection. And I wanna mention that when I I turn on headlights my dash lights go out and after couple of minutes they come on does this sound like a short or bad ground?

Pavement Pounde

Have you tested the alternator for power drop ?

Calixbwsx

I tested it but it's not dropping at all the alt and my battery were chcked and both are good

ninetyone

iTrader: (2)

sound like the positive battery cable at the starter.

Calixbwsx

And I tought It might have to do something with the starter because once I replaced the starter it started acting up and my mechanic told me it's something else but ever since he switched my starter the problem started

ninetyone

iTrader: (2)

sometimes its as easy as wiggling it or moving it and then re-tighten the bolt. careful when u move it ,only touch the insulated cable.

Calixbwsx

So do u think that's what is causing it. I'm not home but I'll check it out when I get home

Calixbwsx

I checked it and it was good but I did see a cable that connects to a sensor that was broken and I see where it connects toO but the harness connection is broken and I don't know what kind of connection it can be. It's right under the engine dipstick and it looks like a sensor but I don't kno what sensor it can be?

Pavement Pounde

That would be the knock sensor.

Calixbwsx

It's not the knock sensor its on the engine block but at the bottom

Calixbwsx

I think it's the tempature switch?

bonesbrakr

iTrader: (3)

knock sensor