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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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It cranks but will not start and it back fires, yes its a

Customer Question

it cranks but will not start and it back fires
JA: Have you checked the engine's fuel supply? And the spark plugs -- are they all working?
Customer: yes its a 1990 chevy silverado k1500
JA: Are you fixing your Silverado yourself? What have you tried so far?
Customer: i checked for spark and i have spark and i can smell the fuel going into the throttle body
JA: Anything else you want the mechanic to know before I connect you?
Customer: i just replaced the intake manifold. it didn't have problems before that
Submitted: 2 months ago.
Category: Chevy
Expert:  kalamykid replied 2 months ago.

The first thing you need to do is pull the number one plug out on the drivers side. Turn the engine over with a ratchet and with your finger in the spark plug hole, turn the engine clockwise till you feel the compression pushing against your finger. The turn the crank till the timing ***** *****nes up on the ballancer with the timing tab on the timing cover. The remove the cap and see what wire the rotor button is pointing to. It should be pointing to the number one plug.