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Discussion Starter · #1 ·
Hello,

This one has me stumped. I have '96 Chevy 1500 5.7L truck. Its been running strong and going on 160K orginal miles. Last week, I went to start it up and it will turn over but not start. Now I'm a junior mechanic and I instantly thought fuel pump. Fuel pump is good. I'm getting a healthy gyser of fuel at the engine. I next thought spark. I took a plug out and did the screwdriver test and I have good spark. I shot starter fluid into the intake and it will not start. I visualy checked the fuses.... they looked good. There is no check engine light and the computer is offering no codes. What else could cause it all of a sudden to have these conditions? Any guidance would be appreciated!!

Wes
 

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well what kind of spark, where is spark, is it at right time and in all cylinders? What screwdriver, put the plug against the block... I once had car die on me while driving, plenty spark at coil and nothing at plugs, the distributor rotor had shorted inside to the shaft.



 

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I know of cases where GM "small cap" HEI ignition systems will burn throughout the cap internally and you will get a spark but NOT a strong one as it is pertly "leaking" through the burn tracts inside the cap

and for the fuel flow @ the engine I assume you disconnected the line into the central multi point injector thingy - I have heard of plenty of injector unit failure causing NO start / ZERO fuel into engine
also check the Fuel PRESSURE over flow as it being a return type of system if the Pressure regulator has quit there will be flow but NO pressure and NO fuel injection
 

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Discussion Starter · #4 ·
Well, I feel like a bit of a bonehead. It ended up just being a extremely dirty distributor cap & rotor. I didn't suspect because I had just replaced it less than a year ago. What causes the extreme buildup of corrosion on the points so quickly? I did fork a couple extra bucks and got the copper pointed ones.

Wes
 
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