converted_to_datsun Posted March 24, 2012 Report Share Posted March 24, 2012 So I bought a 620 2 weeks ago and I'm going through stuff under the hood. on the inake and exhaust manufold there are these metal lines comming out that are suppost to be from an exhaust pump? looks like most of the emissions stuff has been hacked out. My mechanic friend says i should get a new manifold and start fresh. Is there a way to remove all that stuff and still have the rest of my systems work perfectly? I'm about to rebuild the carb tomorrow but not sure what to do after that. Quote Link to comment
datzenmike Posted March 24, 2012 Report Share Posted March 24, 2012 Better post a picture of what you have. Things like the PCV system should be kept. EGR and air pump can be scrapped. Quote Link to comment
converted_to_datsun Posted March 24, 2012 Author Report Share Posted March 24, 2012 I'll post pics in the morning. what systems do i need to pass emissions? I'm exempt where i live but i might move in a couple months Quote Link to comment
datzenmike Posted March 24, 2012 Report Share Posted March 24, 2012 That depends on where you go, what's been done to the truck and what you plan to do. Quote Link to comment
pharouh Posted March 24, 2012 Report Share Posted March 24, 2012 Pictures please,and get a factory service manual. It will be your friend. I had a 78 like that. It looked like they just starting removing stuff with no reason. Quote Link to comment
converted_to_datsun Posted March 24, 2012 Author Report Share Posted March 24, 2012 I'll take some pics today when I'm working on the carb. and my buddy down the street has a manual somewhere. Prolly dig it out when we're doing the carb. He's helping me fix my truck, then when he gets his taxes I'm helping him build his new off road rig. Pretty good deal haha i get to have twice as much fun Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 the lines into the exhaust manifold for the smog stuff were just crimped Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 here's my stock carb before i started the rebuild. I just did the top cause it wasn't in bad shape. Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 Quote Link to comment
TENDRIL Posted March 25, 2012 Report Share Posted March 25, 2012 is it not running good right now is there a mixture, or back-pressure issues.... Quote Link to comment
converted_to_datsun Posted March 25, 2012 Author Report Share Posted March 25, 2012 There was major back pressure issues, but i cut the clogged cat off a couple days ago. I have no muffler just 6 ft of pipe now. It runs ans drives great, i just want to get back some mpg's... I think I'm going to get an intake with all the smog stuff still on it and a manual choke kit to fix my faulty electric choke. Then prolly do more with the exhaust to restore my back pressure. kinda just taking it one roblem at a time. Quote Link to comment
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