No spark and some other symptoms
Thread Starter
Member
Joined: Dec 2001
Posts: 471
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From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
No spark and some other symptoms
Long story short... car sat for a year...
Drove it from it's parking place to my house, was running it charging the battery when it apparently shut off (I wasn't there). I replaced the battery because it was bad but now I have no spark.
According to the manual I should have 10+ volts on the C and + connectors from the Ignition Control Module with the ECM connector disconnected. I have none on one, and residual on the other.
2 guys I talked to said my ICM is probably toast.
The other 2 symptoms are my oil pressure guage was 0 when I first revived it,.. now it's maxed... as is my tach (they are kind of stuck on each other). I also disconnected the tach lead from the coil and the tach is still maxed.
Is this related? or separate?
Rich
Drove it from it's parking place to my house, was running it charging the battery when it apparently shut off (I wasn't there). I replaced the battery because it was bad but now I have no spark.
According to the manual I should have 10+ volts on the C and + connectors from the Ignition Control Module with the ECM connector disconnected. I have none on one, and residual on the other.
2 guys I talked to said my ICM is probably toast.
The other 2 symptoms are my oil pressure guage was 0 when I first revived it,.. now it's maxed... as is my tach (they are kind of stuck on each other). I also disconnected the tach lead from the coil and the tach is still maxed.
Is this related? or separate?
Rich
Thread Starter
Member
Joined: Dec 2001
Posts: 471
Likes: 0
From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
Re: No spark and some other symptoms
Ok... pulled my distributor cap off.. it's not great... and the ICM...
and this is what I'm left with... is it removable? or am I pulling the whole shaft?
rich
and this is what I'm left with... is it removable? or am I pulling the whole shaft?
rich
Senior Member
Joined: Jan 2009
Posts: 611
Likes: 2
From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
Re: No spark and some other symptoms
Replace the distributor. With that amount of rust, your ICM will never get correct readings.
Your oil pressure switch probably needs to be replaced also.
Your oil pressure switch probably needs to be replaced also.
Thread Starter
Member
Joined: Dec 2001
Posts: 471
Likes: 0
From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
Re: No spark and some other symptoms
Do I need to replace the ICM too? Or did it just give up because of all this other stuff?
Is it testable? Oil pressure switch gets accessible after I take the distributor out.
Rich
Is it testable? Oil pressure switch gets accessible after I take the distributor out.
Rich
Supreme Member
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: No spark and some other symptoms
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Senior Member
Joined: Jan 2009
Posts: 611
Likes: 2
From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
Re: No spark and some other symptoms
Oil pressure switch is on the driver side, above the oil filter. ICM comes with the distributor.
Thread Starter
Member
Joined: Dec 2001
Posts: 471
Likes: 0
From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
Re: No spark and some other symptoms
The manual I have lists it behind the driver side valve cover... but I have a car that's 1/2 way between an 88 and an 89... so I'll look in the other place... Looks like I can put the dist in. 
... Wanted to make sure I knew where the oil pressure switch was first. Kind of lucky? the ICM comes with the dist.. the dist was $135. The ICM was going to be $110 by itself...
... Wanted to make sure I knew where the oil pressure switch was first. Kind of lucky? the ICM comes with the dist.. the dist was $135. The ICM was going to be $110 by itself... 
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