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Joined: Aug 2004
Posts: 3
Grease Monkey
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Grease Monkey
Joined: Aug 2004
Posts: 3 |
Okay folks. Here's what i got. I just put in the newly rebuilt 265...went to start it up for engine break in and we got some fairly consistant sputtering??? Acted like a foul plug? Not sure, but a little back firing noise coming from driver side exhaust. Sounded more @ the headers. I am thinking possibly the valves are too tight? I'm new at this, so I may be WAY OFF! I checked all the plugs on that side, none came up positive for gas, so I must be getting spark right? What could it be?
Adam
2000 Dodge Neon w/mods
1957 Chevy Bel-Air
"all stock, don't mock"
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Dec 2001
Posts: 2,142 Likes: 3
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Dec 2001
Posts: 2,142 Likes: 3 |
Pull the plug wires while it is running one at a time and replace them and seee where there is NO difference.
John
John
1954 Belair Sport Coupe
1960 2 door Impala Hardtop 348/340HP 4spd
1962 2 door Impala Hardtop 409/409 4spd
1962 2 Door Biscayne Sedan 327/250 Auto
1977 Monza Mirage 305 4 Speed
1988 Celebrity Wagon
2018 GMC Sierra 2500 HD Diesel
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
Hi, Sounds like a good time to run a compression check and see if anything shows up. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Do you have solid lifters or hydralics?...Sounds as if a valve is too tight....as noted a compression test will pin point it...or pulling one plug wire at a time...would readjust the valves
Gene Schneider
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Joined: Nov 2001
Posts: 19,758 Likes: 63
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 63 |
Vacuum gage will also show if valve (particularly intake) does not seat correctly. Gage reading will jump around if valve problem.
How Sweet the roar of a Chevy four!
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Joined: Dec 2001
Posts: 399 Likes: 1
Backyard Mechanic
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Backyard Mechanic
Joined: Dec 2001
Posts: 399 Likes: 1 |
Make sure you have the plug wires correctly running to the cylinders. Especially on the passenger or even side. The loom runs from the disributor and then is divdied out and takes a twist at 6 and 8. Also make sure your distributor is at #1. 
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