1997 Blazer No Start
07-05-2016 | 02:08 PM
#1
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Junior Member
Joined: Jul 2016
Posts: 3
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1997 Blazer No Start
Hello, I'm new here so just learning my way around.
I have a 97 Blazer with a Cranks but No start condition. It was hard starting for several weeks, then just wouldn't start.
We have replaced the fuel pump, fuel filter, relay is good. We have excellent pressure now but no spark. We replaced the battery, the plugs and wires, ignition coil, cap and rotor. We have checked all fuses and all are good. Although I do find it odd that with all the elec components on this engine there is only 1 fuse center in the truck. We have checked wires in ignition switch for power and all seem fine. Ignition module has power and ground. I still feel we r missing something. I have read so many posts in different forums and webpages that I have completely confused myself. Can anyone PLEASE shed some light on where I should go from here.
I have a 97 Blazer with a Cranks but No start condition. It was hard starting for several weeks, then just wouldn't start.
We have replaced the fuel pump, fuel filter, relay is good. We have excellent pressure now but no spark. We replaced the battery, the plugs and wires, ignition coil, cap and rotor. We have checked all fuses and all are good. Although I do find it odd that with all the elec components on this engine there is only 1 fuse center in the truck. We have checked wires in ignition switch for power and all seem fine. Ignition module has power and ground. I still feel we r missing something. I have read so many posts in different forums and webpages that I have completely confused myself. Can anyone PLEASE shed some light on where I should go from here.
07-05-2016 | 04:30 PM
#2
Senior Member
True Car Nut
Joined: Feb 2015
Posts: 5,978
Likes: 933
From: Earth
Hello, I'm new here so just learning my way around.
I have a 97 Blazer with a Cranks but No start condition. It was hard starting for several weeks, then just wouldn't start.
We have replaced the fuel pump, fuel filter, relay is good. We have excellent pressure now but no spark. We replaced the battery, the plugs and wires, ignition coil, cap and rotor. We have checked all fuses and all are good. Although I do find it odd that with all the elec components on this engine there is only 1 fuse center in the truck. We have checked wires in ignition switch for power and all seem fine. Ignition module has power and ground. I still feel we r missing something. I have read so many posts in different forums and webpages that I have completely confused myself. Can anyone PLEASE shed some light on where I should go from here.
I have a 97 Blazer with a Cranks but No start condition. It was hard starting for several weeks, then just wouldn't start.
We have replaced the fuel pump, fuel filter, relay is good. We have excellent pressure now but no spark. We replaced the battery, the plugs and wires, ignition coil, cap and rotor. We have checked all fuses and all are good. Although I do find it odd that with all the elec components on this engine there is only 1 fuse center in the truck. We have checked wires in ignition switch for power and all seem fine. Ignition module has power and ground. I still feel we r missing something. I have read so many posts in different forums and webpages that I have completely confused myself. Can anyone PLEASE shed some light on where I should go from here.
1. How many miles are on your Blazer?
2. Can you pull codes from the PCM?
3. What is the fuel pressure when the ignition is on?
07-05-2016 | 04:57 PM
#3
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Junior Member
Joined: Jul 2016
Posts: 3
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Thank you for response.
We don't have the guage for pressure but just put in brand new Delphi fuel pump. I can tell you it shoots out now as I didn't before. I was told it won't have any codes because the battery was replaced with a brand new one. But no one has tried to get any. I believe we r sitting at 163523. I bought this truck in Feb from a dealer who told me he had just replaced the fuel pump. I believe he put in a cheap one as the module itself was cracked and the strainer was very dirty. But now we r getting no spark at the plugs at all. We changed the ign coil, cap and rotor, plugs and wires. Not understanding at all how changing the fuel pump screwed with the fire....unless it wasn't the pump in the first place???
We don't have the guage for pressure but just put in brand new Delphi fuel pump. I can tell you it shoots out now as I didn't before. I was told it won't have any codes because the battery was replaced with a brand new one. But no one has tried to get any. I believe we r sitting at 163523. I bought this truck in Feb from a dealer who told me he had just replaced the fuel pump. I believe he put in a cheap one as the module itself was cracked and the strainer was very dirty. But now we r getting no spark at the plugs at all. We changed the ign coil, cap and rotor, plugs and wires. Not understanding at all how changing the fuel pump screwed with the fire....unless it wasn't the pump in the first place???
07-05-2016 | 05:24 PM
#4
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Joined: Jul 2003
Posts: 17,942
Likes: 1,804
From: Dark Side, AZ
If you are not getting spark wile cranking, then the ignition module probably isn't seeing a crank signal from the crankshaft sensor.
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07-05-2016 | 06:31 PM
#6
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Joined: Feb 2015
Posts: 5,978
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From: Earth
Thank you for response.
We don't have the guage for pressure but just put in brand new Delphi fuel pump. I can tell you it shoots out now as I didn't before. I was told it won't have any codes because the battery was replaced with a brand new one. But no one has tried to get any. I believe we r sitting at 163523. I bought this truck in Feb from a dealer who told me he had just replaced the fuel pump. I believe he put in a cheap one as the module itself was cracked and the strainer was very dirty. But now we r getting no spark at the plugs at all. We changed the ign coil, cap and rotor, plugs and wires. Not understanding at all how changing the fuel pump screwed with the fire....unless it wasn't the pump in the first place???
We don't have the guage for pressure but just put in brand new Delphi fuel pump. I can tell you it shoots out now as I didn't before. I was told it won't have any codes because the battery was replaced with a brand new one. But no one has tried to get any. I believe we r sitting at 163523. I bought this truck in Feb from a dealer who told me he had just replaced the fuel pump. I believe he put in a cheap one as the module itself was cracked and the strainer was very dirty. But now we r getting no spark at the plugs at all. We changed the ign coil, cap and rotor, plugs and wires. Not understanding at all how changing the fuel pump screwed with the fire....unless it wasn't the pump in the first place???
I agree with Mike, it'* probably not getting crank-position sense. It was probably flaking then failed in your lap.
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