New guy with a project.

[Hillbillybuddha]

My first Datsun since my little brother drove my 1972 240z into oncoming traffic back in the 80's

My girlfriend decided to buy me a truck yesterday. (She really is great) because my old 1966 F250 gets about 10mpg. She saw a 83 Datsun/Nissan 720 for sale for $500. Great deal, right? Drives and handles great! I mean, it is a peppy little monster. The only problem, the guy told her, was that it was registered out of state. I guess by, "registered in another state", he meant one without emissions controls.

I opened the hood and there are no vacuum hoses; aftermarket headers, no cat, weber carb, tiny aftermarket air filter, no O2 sensors that I saw (but no "check engine light" either???) and who knows what else. All great stuff if I lived in the land of the free but here in california, we have a responsibility to our friends and neighbors who like to breath and stuff.

So, it would seem that I have some work to do. Luckily, tomorrow is 50% off day at the Pick n Pull, and an 82 Datsun 720 got dropped off at the lot yesterday (according to their website) So the plan is, go pull all the emissions stuff off of that truck, plug it onto my truck, have a CAT installed and give the old smog test "a go". I assume I'll fail the first test but it will give me a base from which to build from.

Here's my question, the lack of the "Check Engine" light. I'm assuming that the ECU has been changed (or deleted??? I'm at work now and haven't looked all that close yet) Actually, I'm not sure what my question is... Ok, here's one. I consider myself a good, shade tree mechanic. I've rebuilt engines, I've rebuilt transmissions, I was about to put power steering and power disc brakes on my 66 F250. If there's a job, I can generally get it done (unless its welding and needs to look pretty. I can weld and I can "pretty" but I can't seem to do both)

So, how hard is this going to be?

Thanks,
Joel


Oh, one more question. How does that engine run so well with all those open vacuum connections? I mean, really! I put my finger over one of the ports and my finger got sucked right to it... Crazy!

[Hillbillybuddha]

I just realized I do, in fact, have a question:
It seems that, at Pick n Pull, they have an 1982 720 (Z22S engine) and a few 1986 and 87 Nissan 720's (which I'm guessing would have the Z24i engine) and I believe that I have the Z24 engine.)

Will these emission systems be the same or close enough? I'm mostly worries about passing the "visual inspection" part of the test.

[Tpanda]

I just realized I do, in fact, have a question:
It seems that, at Pick n Pull, they have an 1982 720 (Z22S engine) and a few 1986 and 87 Nissan 720's (which I'm guessing would have the Z24i engine) and I believe that I have the Z24 engine.)

Will these emission systems be the same or close enough? I'm mostly worries about passing the "visual inspection" part of the test.

go with 86-87 models. My z22 looks similar to Z24's but if youre going apples to apples thats just my two cents.

Probably wouldnt be a bad idea to snag the carb off the Z24 if its not fuel injected. Ive read the webers fail emmissions.

I live in SC with no emmissions so my truck is all vacuum ports plugged, no cat, and weber carb. Land of the free and rednecks. lol

[Hillbillybuddha]

Hopefully I grabbed the from the correct truck. I did grab the carb too. I took lots of pictures and tried to get from the trick that looked the closest, I think only the fuel to carb line looked a little different but I'm thinking the one on my trick was altered a little too except the Weber and spacer.

I'm going to the muffler shop in a few to get a CAT installed.

I do have a question about the O2 sensors, is the only one on this truck in the header? And I don't think this truck had a check engine light. Could that be right?

Thanks

[ben1]

My 83 doesn't have an ECU, an O2 sensor, or a check engine light. Just a carb w/ electric choke and vacuum-run mechanical emissions stuff (which I ripped off). I don't live in an inspection state, but I'd make sure your engine is tuned up and your catalytic converter is working right and you should be OK.