Bad ECM or bad connection?
#1
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Bad ECM or bad connection?
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?
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Re: Bad ECM or bad connection?
I tested it but it's not dropping at all the alt and my battery were chcked and both are good
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Bad ECM or bad connection?
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?
#5
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Re: Bad ECM or bad connection?
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
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Bad ECM or bad connection?
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.
#7
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Re: Bad ECM or bad connection?
So do u think that's what is causing it. I'm not home but I'll check it out when I get home
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Re: Bad ECM or bad connection?
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?
#10
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Car: 89 Iroc
Engine: 305 TPI
Transmission: 700R
Re: Bad ECM or bad connection?
It's not the knock sensor its on the engine block but at the bottom
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