94 Blazer Cranks No Start

[Chevy Maros]

Hi, I have a 94 S-10 Blazer 4x4 4.3L W motor. I have done a lot of work to this money pit and it has another problem now that I'm having trouble shaking down. Last winter around March of 07 I think, shortly after I fixed its last problem (leaky oil cooler lines, btw what a pain in the A ) and got some good running time from it for a change; it just began stalling repeatedly, I ran out of money to commit to the thing so it has sat since and now thats its warmed up I'm back at it but now it won't start at all. I've tried a few things but have not been able to figure out what is causing it not to start. Battery has been desulfated and fully recharged, and fuel pressure is at about 62 and slowly leaks down. I pulled plugs and found no problems. I suspect it may be distributor related, I did pull the cap off and clean off the contacts but I'm probaly going to pick up a new cap and rotor (though I'm not sure how to remove the rotor) along with some fresh plugs and perhaps an in-line spark tester tool tomorrow. I would greatly appreciate any advise you guys have.

I have replace the spider injector, feeder and return lines which were leaking inside the manifold, the EGR valve, entire fuel lines and filter, fuel tank and sending unit, plugs and wires all about 1 1/2 - 2 years ago along with many other unrelated parts. Thanks

[MT-2500]

Does it have good hot blue spark to all or more than one spark plugs?
Is the coil putting out good spark?
Will it start on carb cleaner?
MT

[Chevy Maros]

How can test for those spark conditions, will an inline spark tester work? I went all over today looking for one. Sears, 2 Autozones and a Advance auto but none had one. So i'm going to get one online and i'll just have to wait to get it.

[MT-2500]

In this post socks made one.
http://www.automotiveforums.com/vbul...44#post5718844

A good parts place should have one.
But you can make one to.

I use a phillips screwdriver stick end into plug wire and hold the metal part close to engine block and see if the spark will jump around 1/4 and have a good blue spark and good snap.
Also solder one wire on base of spark plug and ground it to engine block and widen the plug gap to close to 1/4 and see if spark will jump the gap.

[Chevy Maros]

So I got a In-line spark checker tool and tried it on the coil to start with and it got nothing, so I'm going to pick up a coil in the next day or two. I tested the tool on my 93 Camaro and it lit right up so the tool definitly works. It wouldn't be anything else would it? I mean if it cranks but has no continuity at the coil. Thanks

[MT-2500]

How many post does it take to fix it?

Coil can be dead but to get spark out of a coil you need a good dist that is turning to trigger it and good ign to coil.
Is you dist rotor turning?
Got good ign to coil?
Auto place shopuld be ableto test coil.
But most no spark problems will be dist module or dist pickup coil.
Have the dist module tested to.
MT

[Chevy Maros]

Do you know of a way to test the control module?

[MT-2500]

Originally Posted by Chevy Maros

Do you know of a way to test the control module?

It may take some equipment to test.
Check parts place and see if they have a tester.
Best test I know of is to install a known good one.
Also check your old dist for side play on dist inner shaft.
Have you checked to see if you dist is turning the rotor when cranking engine?
If the shaft is lose or the dist gear is stripped I would get a rebuilt dist.


I keep a good complete extra dist and without installing just hook it up and spin it and check for spark.

Good Luck
MT

[Chevy Maros]

Awsome news, got it running today! After a new Ignition Control Module and distributor cap its running great. Thank you to everyone who posted tips and advise.

[MT-2500]

You are welcome and thanks for posting back how it went.
Glad all is well and running good.
When you get time you might want to check base timing with a timing light and dist/pcm in base time mode.
Good Luck
MT