Possible distributor issue

[Keepinitoldskool]

So awhile back my truck, 88 sierra 5.7l tbi, started missing, popping, and bucking and could barely be driven. After a quick inspection i found alot of corrosion inside the distributor so i bought a whole new one. I swapped them out making sure that it was at TDC on #1 and it went into the exact position the original dizzy was in. I got the timing set with no problems. Now the truck is running alot better but im still getting some bucking under a load. I decided to replace the plugs and wires. While checking the firing order i noticed that my distributor isnt eaxactlt orientated like the ones i see in other pictures, the whole thing is turned about 10-15* clockwise from where i see number one on other peoples. Could this be my problem although i gad no problem getting the timing set to 0*?

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[Keepinitoldskool]

also it runs perfect at idle and light throttle smooth and quite

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[chipskittles]

Sounds like weak spark to me

 

[Keepinitoldskool]

Sounds like weak spark to me

The entire ignition system is brand new, distributor, coil, plugs, and wires.

Good news is i just drove it 45 miles without a single hiccup. It seems i fixed the issue. But it does feel slightly down on power. I gapped my plugs at 40 instead of 35 since i have all new ignition system i figured i could get a hotter spark and better burn, but i may pull them back out and reduce the gap back to 35 to see if it makes a difference.

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[chipskittles]

Keep the plugs simple too, none of those fancy pants spark plugs lol

 

[Keepinitoldskool]

Keep the plugs simple too, none of those fancy pants spark plugs lol

Yeah on this old motor i just use the ac delco coppers. My 2001 6.0l takes those damn iridiums that are like $7/each

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[Keepinitoldskool]

Ok so i drove it again today and it actes up again. Feels more like a fuel issue though. I pulled over and shut it off, then started it up and tried to blow the problem out the tailpipes, then proceeded to drive 60 miles with no issues.

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[tannerezell077]

Ok so i drove it again today and it actes up again. Feels more like a fuel issue though. I pulled over and shut it off, then started it up and tried to blow the problem out the tailpipes, then proceeded to drive 60 miles with no issues.

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try coolant temp sensor test it and then if that's not the case check fuel pressure, ground wires (especially check fuel pump ground wire)

 

[Tom P]

You say it looks like it's 10-15 degrees off from similar truck? Very well could be you're a tooth off. Had the same issue in an old 350 I rebuilt. Would start and run ok but had no power down the road. That was an old school hei system with vacuum advance though.

 

[Kevin New Mexico]

As long as your base timing is on then it does not matter were your #1 is. I rotated my dizzy 90* to keep it away from the heat. My base timing for my 464 had been at 8*, just changed it to 10*. Change your fuel filter.