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95 Chev 1 ton no start.

O

old

Well-known Member
Location
Camdenton Missouri
So I went to the friend place today to see if I could get his 1 ton running. Tried spraying carb cleaner in the TBL to see if ti would try to run and that was a no go. I pulled the center wire from the cap and put a spark plug in it and used vise grips to hold it tight to a good ground. I have NO spark. So we replaced the ignition module, the coil, cap and rotor. Still no spark. So what else might it be?? I'm thinking either pick up coil which is in the distributor or the ECM which if it is the ECM that will cost a good bit of $$
Thanks and hope some one can give me some ideas as to what maybe wrong
 
The only way to check the stator is with a scope, but if I had the symptoms you did and found a bunch of greenish corrosion around the pickup stator when the cap was removed. I'd replace the distributor, usually pickup and module come with it.
 
ECM won't kill the spark on that engine, distributor can function without ECM input. ECM just tells the ignition module where to put the timing. If you want to check, unplug the bypass under the dash on the passenger side, brown wire in a single connector, taped to the main harness. Disconnecting the bypass forces the module to control timing based on speed, this is also for setting base timing. If it has no spark with that disconnected, the ECM has nothing to do with it. Any other basics checked? Power to coil, power to injectors, injector pulse, fuel pump run on key on? No spark may just be a symptom of no power. Distributor pickups do fail, but they usually cause erratic running. Replace the whole distributor if you decide to throw the pickup at it, the magnet and pole piece on the shaft crack and cause all sorts of weird issues.
 
I did look at the wiring diagram and saw that as per that diagram the pink wire on the coil Went right to the ignition switch so I did try a hot wire form the Battery to the coil and still have no spark or start
 
Closely check the fuse box under the hood.
On a 1995 GMC I came across a dead fuse socket that caused exactly the problem you are describing.
Dang thing showed voltage when checked with a meter but would not light a test light.
Ran a temporary jumper from one of the other sockets that had key on power last year and still working fine.
 
I did check all the fuses and did notice there is an ignition A and B fuse so I'll try to remember to check that there is power on both sides of both fuses with a test light
 
check for a short where the wire goes thru the bottom of the distributor. Sometimes rubbing wears thru the wiring & shorts across the dist. plate, killing the power. Prolly can't see that from the top.
 
On my 95 K1500, I washed the engine (350) and that killed the coil (deader than a mackerel), left me stranded about a mi from home. I cover the ignition with a plastic bag if I want to wash it any more.
 
Ya this one has been odd. No spark at all and a good number of things that can cause it. Would not give spark even when hot wired so it has to be something that does not happen often so a bit harder to track down. One thing tha tdoes not help is this guy is a turn key guy. If it runs good if it doesn't then well he has no clue what to do other then call me. LOL

At least his 1941 9N still runs good. That is how we met years ago he put an ad on Criag's list need some one to fix his tractor and I answered his add
 
When my '95 did this, it was the dist. pick-up coil. I goggled for info & pretty much checked things as you have. I recall there was a way to check that unit before removing dist, [ohms & needle sweep while cranking, can't recall] I just went ahead & changed dist, as that was the only untested thing.
 
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