I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. The first coil I installed, I did not install the two grounding straps. No fire . I exchanged the coil for a new one and installed the new one with the straps, still no start. Can you tell me how to trouble shoot this problem.
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The rotor button should be pointed at the number one cylinder on the contact of the distributor cap. Be careful because on some of the GM distributor caps can be a little confusing. The contacts on the inside of the distributor cap can sometimes be a little confusing. Also on another note, those 5.7 vortec heads on a older 5.7 TBI block will make a very noticeable difference. Make sure and check the exhaust and intake ports and see if they are the same size. Some vortec heads have what they call a "Cathedral port". Lastly if you are kinda handy around a shop you can port and polish the inside of the cylinder head yourself. The main thing is to get all of the rough casting burs off the inside of the ports. I have used a flex head dremel tool and sanded them smooth. You will not believe the increase in torque, horsepower, and throttle response. Good luck.
have you checked the filter, i know you state the fuel lines are clear though. likely fuel injectors have lost flow. the TBI injectors can be cleaned, but i usually just replace them. but check them using a timing light hooked to the coil wire for timing of each injector spray. the pattern under the light should be even and conical shape, no major spatter. if one shows low volume, the other one should be replaced at same time, it will save you having to change it when you put brand new next to old one a have same problem again. only replace with brand new, i've had 7 bad remanufactured injectors on one truck at one point in time, only replace with new!
Try a new distributer cap and rotor button,these are notorious for wearing out the carbon pick-ups and leaving carbon tracks in the cap which messes up the fireing order.If that does'nt fix it try plugs and wires.