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Username Post: 1995 Chevy Truck 5.7 V8 no spark        (Topic#355147)
Roadyacht 
Poster
Posts: 14
Roadyacht
Reg: 07-19-18
02-07-19 05:23 PM - Post#2759339    

Hello Everyone
I have a no spark condition but the engine will crank
I replaced the ICM in the distributor thinking that was the problem. But I still have a no spark now
I was wondering if I need to test the coil (but I need some info on how to do that, all suggestions would be appreciated)
I did have the ICM tested before I purchased a new one and it tested BAD.
I have a OHM meter and a test light
I also have oil pressure when cranking and no codes are set in the computer.
I put a new coolant sensor in last fall and cleaned all grounds, it was running perfect until yesterday when I went to start it after sitting all winter in the garage.
Thanks in advance
Denny aka Roadyacht



 
CowboyTrukr 
"8th Year" Silver Supporting Member
Posts: 4189
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
02-07-19 11:13 PM - Post#2759356    
    In response to Roadyacht

How old is the distributor, Denny?

Greg

'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD
‘87 GMC S15 SCLB 4.3 Auto - SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
Guy named Guy 
Poster
Posts: 40
Guy named Guy
Age: 27
Loc: Grand Prairie, TX
Reg: 07-31-13
02-08-19 01:15 AM - Post#2759360    
    In response to CowboyTrukr

I'm with CowboyTrukr. With TBI, it's always a bad distributor when there's no spark.



 
Roadyacht 
Poster
Posts: 14
Roadyacht
Reg: 07-19-18
02-08-19 07:48 AM - Post#2759370    
    In response to CowboyTrukr

Here is more info that you requested
This truck has 75000 original miles on it and I am the only owner.
It is garaged every winter since I have had it, I only put about 3000 miles on it during the summer months
I also checked the fuel pump relay and it seems to work correctly, I hear the pump turn on when I jump 85 & 86 pin on the fuse block, with key on there is one pin with voltage all the time.
Battery shows 12.35 Volts, but remember I have been cranking it to try and start.
I'am now charging the battery but it seems to be up to par because it cranks very fast
For some reason I'm thinking now it might be the coil, but don't know how to check it.
Thanks for being here to help.
Denny aka Roadyacht
my email is KJ8Y2@aol.com



 
CowboyTrukr 
"8th Year" Silver Supporting Member
Posts: 4189
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
02-08-19 08:42 AM - Post#2759379    
    In response to Roadyacht

Borrowed this from long time member, Vaughn.

Does the coil have 12 volt on the positive terminal when the key is turned to the on position (not cranking)? If it doesn't,run a jumper wire from the positive battery terminal to the positive coil terminal, and then try to crank it over.

Greg

'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD
‘87 GMC S15 SCLB 4.3 Auto - SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
Roadyacht 
Poster
Posts: 14
Roadyacht
Reg: 07-19-18
02-11-19 08:37 AM - Post#2759615    
    In response to Guy named Guy

Looks like I found the problem I think
Here is what I found
I was always checking for spark at the end of the #1 plug wire with the tester, and always no spark.
So after checking the coil with a ohms meter, things seemed to check out good (low resistance on primary and high resistance on secondary, I thought the coil might be good so I decided to look further down the line.) low and behold I checked the wire from the coil to distributor and nothing on that wire, I cut the boot off and there it was terminal had rusted very bad no connection, no wonder I never seen spark at the end of the plug wire
Now I thing when I get a set of wires It will start, At least I hope so.
Going to hook up a test light at the coil and see if it sparks, when I get a chance to go out back and see.
LESSON LEARNED ALWAYS CHECK SPARK AT COIL FIRST
Thank for the help again
Denny aka Roadyacht



 
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