94 GMC 350 TBI won't start

Asked by Nov 15, 2016 at 02:25 PM about the 1994 GMC Suburban C1500

Question type: Maintenance & Repair

I changed the intake gaskets put it back
together and now it won't start I try to turn
it over and it keeps popping out the

6 Answers


Do you mean you are getting a backfire out of the carb, if so sounds like your timing if off for some reason, did you touch anything else while working on the car ?

No I didn't touch anything else and yes it's back firing


Check the timing and make sure all the spark plug wires go to the correct cylinders.

I did that and rechecked I'm lost


Check for vacuum leaks but I think you missed something on the timing. Did you get it 180 degrees off? Try static timing - put the #1 cylinder on TDC compression stroke and then set the distributor so that the rotor points to the #1 spark plug wire. This should get you close enough for the engine to start.

Ok I'm going to redo it again

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