306 Blueprint with Holley Sniper Issues

[Beer and Fish]

So I got my engine in and am very happy with the performance and results HOWEVER Sunday I pulled the Bronco out of my shop to give it a bath and I was very careful not to get any insides or under hood wet. Coincidentally, I started the truck and it was super choppy, almost lean-like or complete misfire on multiple cylinders. Chugga Chugga Chugga and never got better. I tried over and over to make it right checking distributer cap for moisture, checking spark plug wires etc. I have a Holley 556-152 Coil. Any ideas on what is happening here? The motor has less than 200 miles on it. It went from being a performer to limping out of the driveway! What gives? Holley Issue? Blueprint issue? Coil Issue? 02 issue?

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[73azbronco]

Check fuel pressure at carb, step one.

 

[Eoth]

Just shots in the dark.... Only thing we know is that a new engine it is running rough after sitting for a bit. Got to start eliminating things. Start with the basics.. Fuel, Spark, Air.... Tell everyone how you checked each and why you think it is good or bad. I could guess what the issue is, but it could lead you down a dead end and waste your time.

 

[Beer and Fish]

most likely a fouled plug thing. First 500 miles or break in according to Blue Print Engines. We will know in a day or two. Doing some other stuff too!

 

[BluePrint]

So I got my engine in and am very happy with the performance and results HOWEVER Sunday I pulled the Bronco out of my shop to give it a bath and I was very careful not to get any insides or under hood wet. Coincidentally, I started the truck and it was super choppy, almost lean-like or complete misfire on multiple cylinders. Chugga Chugga Chugga and never got better. I tried over and over to make it right checking distributer cap for moisture, checking spark plug wires etc. I have a Holley 556-152 Coil. Any ideas on what is happening here? The motor has less than 200 miles on it. It went from being a performer to limping out of the driveway! What gives? Holley Issue? Blueprint issue? Coil Issue? 02 issue?

BLUEPRINT ENGINES PLEASE CHIME IN

Glad to help, sounds like you called in. I would agree, that a fouled plug is probably culprit #1. Is this EFI or Carbed? fuel pressure is also important with both. Usually calling in with serial# is the fastest way to pinpointing, so sounds like you have done that and are on the right track. If its EFI, and has a bunch of cold starts on it with no, or very little drive time, it can fould plugs fairly quick.

You're welcome to try NGK BKR5E/7938 plugs. they are a little hotter.

 

[RODRIG3911]

I'd download a Sniper datalog to see what I shows... Maybe post a log on here and we can check it out togehter

 

[Beer and Fish]

It was fouled plugs. On the road again!