hey my 96 blazer wont start at all i smell gas its got good spark but it never starts up, the only thing i noticed is that when i crank it wont start but when i let go of the key an put it on the off position like to remove the key it sparks again anybody has an idea??? i replaced the coil, icm, crankshaft sensor and camshaft and i scanned the ecm and no codes... any ideas??????

 

I see that you already have a thread concerning this matter. You should repost this information into that thread. I am locking this one.