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03-21-2008, 03:11 AM
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#1 |
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Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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96 4.3 wont start
I went to move my s10 today & it wont fire. Cranks & cranks. It has oil pressure when cranking so I know its not the sender. Ill try a cap, coil & plugs & see if that helps. I dumped a little gas in the TBI but not even a pop. Its got quite a few miles & I was a little worried about the timing chain, but the way it sounds on the net they dont go out very often. Any other ideas what to look for? Talk slowly, Im pretty dumb when it comes to the newer stuff. Todd?...Thanks...
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03-21-2008, 06:10 AM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: 96 4.3 wont start
Check for spark first. No spark? Ignition module is toast. Does the rotor turn when you crank it? If so then the timing chain is good. If the rotor is not turning during cranking, the timing chain is toast.
If the engine turns over fast like no load on it, the chain is my first guess. Can you hear the fuel pump prime with the key on? |
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03-21-2008, 06:39 AM
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#3 |
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Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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Re: 96 4.3 wont start
Fuel pump primes. I havent had the cap off yet but will tomorrow. I held the pedal to the floor for bit & it coughed one time. Where is the module on a 96? It most definately needs a tune up either way.
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03-21-2008, 08:10 PM
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#4 |
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Registered User
Join Date: Apr 2004
Location: N.E. MO
Posts: 1,749
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Re: 96 4.3 wont start
My first guess would be spark plug wires if they haven't been replaced in a while.
Especially if the weather has been damp there like it has been here. I'm not that familiar with the newer motors though.
__________________
72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey |
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03-22-2008, 01:18 AM
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#5 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: 96 4.3 wont start
Under hood, passenger side, upper engine area, mounted on front cylinder head below valve cover under ignition coil. Trace the coil wire back from the distributor. The ignition module is bolts to the same bracket as the coil.
 The coild and ignition module are connected together with the small harness. |
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03-22-2008, 01:21 AM
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#6 | |
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Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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Re: 96 4.3 wont start
Quote:
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03-22-2008, 01:19 AM
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#7 |
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Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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Re: 96 4.3 wont start
I called a mechanic friend today & he said he has been replacing a LOT of basic tuneup parts because of the humid weather. He also told me that the 4.3 isnt really known for timing chain issues & he gave me a list of things to check. I have to tint windows tonight so maybe Ill dig into it this weekend. I doubt its ever been tuned up, its gonna get one now...
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03-22-2008, 04:12 PM
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#8 |
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blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: 96 4.3 wont start
they call that an ignitor. it has no logic, just a remote switch for the coil.
I can call you tonight. |
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03-27-2008, 07:14 AM
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#9 |
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Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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Re: 96 4.3 wont start
Cap & rotor fixed it. They were both origionals yet...
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