No Spark
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No Spark - 1/11/2008 10:33:20 AM
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OGER
Posts: 16
Joined: 1/11/2008
From: Germany
Status: offline
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Hello Forum,
during driving my engine suddenly stoped working.
I got the Blazer back home and cheked the distributor (was realy worn), bought new Cap and Rotor, checked again, still no spark.
Checked direct from ignition coil, no sparc
cheked fuses: all good
cheked voltage at the red wire on the coil when ignition switch in on Position= 11,5V
cheked voltage at the wire from the coil to + terminal from ignition module when ignition switch in on Position= 11V
cheked voltage at the wire from the coil to C terminal from ignition module when ignition switch in on Position= 11V
cheked pic up coil to ground: infinite resistance
cheked pic up coil circut: steady value 850 Ohms
cheked ignition coil resistance to specifications: seems OK
bought a new ignition modul (Not GM or ac delco): no spark
Tell me please, what should I do next?
how can I test the engine controle modul?
how can I test the ignition module?
for what is the 4th (grey) wire on the igniton coil
BLAZER S10 / 1994 / 4x4 / TBI / auto / engine code Z
thank you!
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regards Sebastian
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RE: No Spark - 1/11/2008 12:07:43 PM
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swartlkk
Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
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Sure sounds like you are on the right track. Without looking the system over in my references (don't have them at work with me sorry), it sounds like you have the proper voltages at the proper places. If that is in fact true, then the next step would logically be the ECU. If you lived in the US, I would tell you to run on down to the local junk yard and grab one to try. I don't think that would be an option for you over in Germany... And most parts stores here in the states would not let you "try" an electronic component out...
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: No Spark - 1/11/2008 2:33:22 PM
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thegr81
Posts: 2621
Joined: 1/16/2007
From: PHOENIX,AZ
Status: offline
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What does your truck do when you have the key in the on position?? Does everything turn on like its supposed to?? Does it just crank and crank???
_____________________________
2001 2wd 4.3 vortec v6
"I'm not fat, I'm a minitrucker"
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RE: No Spark - 1/13/2008 7:11:40 AM
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swartlkk
Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
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Is the ECM also from a TBI vehicle? If so, it should work fine.
_____________________________
Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: No Spark - 1/13/2008 10:50:16 AM
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Blazin_Jason
Posts: 1067
Joined: 5/17/2006
From: Van Isl, B.C.
Status: offline
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quote:
ORIGINAL: OGER
I will call this guy tomorrow and ask him.
Do you think i should change the ignition coil or the pick up coil first bevore I buy a new ECM?
Yes replace the ICM as that would be the easiest part to swap. Give that a shot first.
_____________________________
85 S10 Blazer 4x4, 2 door, undergoing 350 swap, 3" BL, 33''''s
89 Jimmy 4x4, 2 door, 4.3/auto
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RE: No Spark - 1/13/2008 11:01:30 AM
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Blazin_Jason
Posts: 1067
Joined: 5/17/2006
From: Van Isl, B.C.
Status: offline
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quote:
ORIGINAL: OGER
ICM = ignition coil module?
Do I have to take out the distributor to change the pick up coil?
1. Yes
2. I believe so, that's why I would change the ICM first
My truck lost spark and when reading through the haynes manual had it down to either the ICM or pickup. I just ended up replacing the entire distributor since it wasn't too expensive.
_____________________________
85 S10 Blazer 4x4, 2 door, undergoing 350 swap, 3" BL, 33''''s
89 Jimmy 4x4, 2 door, 4.3/auto
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RE: No Spark - 1/13/2008 11:48:01 AM
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swartlkk
Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
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I do not think you do not need to pull the distributor to change the ICM (pick up coil - same thing).
_____________________________
Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: No Spark - 1/13/2008 11:58:41 AM
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Blazin_Jason
Posts: 1067
Joined: 5/17/2006
From: Van Isl, B.C.
Status: offline
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No the ICM can be changed easily by pulling the cap off. The pick up coil apparently you need to pull the distributor and take it apart. That's what the Haynes book said at least.
_____________________________
85 S10 Blazer 4x4, 2 door, undergoing 350 swap, 3" BL, 33''''s
89 Jimmy 4x4, 2 door, 4.3/auto
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RE: No Spark - 1/13/2008 12:01:22 PM
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swartlkk
Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
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Strange.. When I was looking into this, there was no mention of a pick up coil separate from the ICM... Figures now that my laptop video card has screwed up I'd have to get back onto it to look at things again...
< Message edited by swartlkk -- 1/13/2008 12:05:48 PM >
_____________________________
Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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