This is a very stressfull time around my house. I have been waiting for this motor since the end of November, it got here last week and I have been diligent in my installation and taking care of its needs, it owes me a start and run. But alas it wont run... I bought a "turn-key" remanufactured 360 AMC from remaufactured.com (NEVER under any circumstances buy anything from this company), they built, ran, and timed the motor prior to shipping it. I installed it (with the usual complications, which have been mostly worked out) and hooked everything up. The first time I tried to start it, it backfired a bunch through the carb so I figured it was timing, after a little while I noticed that the 1 and 5 wires were swapped. So now, it will run and rev high (4K rpm) and then cut out. If I give it gas it will run a little longer but will not even come close to stay running on its own. It has an edlebrock performer carb 4bl, HEI dizzy, its a 77 cj5 and all the fuel system (tank to carb) was new right before I pulled the 304 out. Incidentally, the 304 was running and the jeep was very driveable prior to me removing the 304 so I have to think its something with the motor and not the rest of the vehicle. My thoughts are that: I have spark, and probably decent timing otherwise it wouldnt rev like that, I think its fuel somehow but I have no idea where to start. I did put in brand new gas too by the way. I have posted a 30s video to show what it does when I crank it. BTW, I know its leaking under the front end its a power steering couple leak. Thanks for your help.
Do you have a clear fuel filter on it, with that you can watch for fuel flow. If not test your fuel system by pulling the line off the carb and running it into a bottle. Can you borrow a known, good carb to try?
__________________ '81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s............... John N
I am going to get a clear fuel filter, good suggestion. As far as the carb goes, I bought it new and it was running on the 304 fine when I pulled the motor. Supposedly they ran the motor with the carb on it before shipping it in order to tune and time it.
What are the common vacuum leak locations. I have never "looked for a leak" before. I do think its either fuel or I guess vacuum which results in poor fuel flow. This is all good banter guys, thanks a lot. I would never have been able to do what I have to this jeep if it wasnt for the help I have recieved here.
Went to autozone and pepboys today and asked for a vacuum gauge. I could have gotten a better response from Beavis and Butthead!!!. I will locate on online and purchase there. When I do get it, how do I use it. I do have a theory, I noticed early on when I was trying to start the motor that I got a little backfire and some vapor came out from between the carb and the manifold, could that be where my leak is coming from? If it is, what is the best way to seal that, its a brand new gasket there and I dont think I want to use any sealer.
Im sure autozone probably stocks them on a shelf somewhere. If you dont want to wait either try another autoparts store or just look around and you shoudl be able to find one.
the help at autoparts stores is pretty bad around here too. The Napa here is pretty good, but you really hve to walk the guys at autozone through their own computer system to find a part half the time. Usually i try to find the part number i need online then just get them to cross refrence it or something
But anyways thats somethign they shoudl carry they probably just dont know what it is. They probably dont sell many so they may have not stocked it or had to reorder in years.
"I noticed early on when I was trying to start the motor that I got a little backfire and some vapor came out from between the carb and the manifold, could that be where my leak is coming from? If it is, what is the best way to seal that, its a brand new gasket there and I dont think I want to use any sealer."
I would start there, retorque the carb. If that doesen't help, replace the gasket. Seems to me that if "vapor" can get out, air can get in.
I got it started and running well. It was the gap between the carb and the intake. When I had taken the carb off for putting the motor in I guess I left the washers on the mounting studs and then didnt notice them when I replaced the carb. So I essentially had spacers on all four of the mounting studs. When I took those off and reinstalled/torqued the carb she started right up and hummed nicely. So, it was fuel starved as a result of a vacuum leak, you guys nailed it. Also, it was the gap between the carb and manifold, good job and thanks guys. Next step, I will be working on a power steering leak.
Nice, Gotta love video, best way to visualize issues and actually hear them. Good incentive for other to post with issues like that. I think you will be pretty happy with the motor, everything needs modification on a Jeep.
Look forward to your progress
85' CJ7 Laredo, 383 GM, Turbo 350, NP 203. SOA, 2" frame lift, 34" TSL swampers, Dana 30 open, AMC 20 w/ detroit locker, 4:10's, 1 Piece Mosers, 35" boggers to abuse when needed.