Please HELP!!!
I have a question about a 1989 Jeep Grand wagoneer with the 360ci. V8.
I purchaced this Jeep not running, I first did a compression test-
-This is how the comperssion test went -
-1-98 2-110
-3-98 4-115
-5-110 6-120
-7-100 8-118
I replaced the fuel filter, fuel pump, plugs wires, cap, and roter.
After doing the tune up the Jeep cranked 5-6 times making a "fwooump"
sound on every revolution, then it fired up - hi idiling at about 2500RPM
- I kicked it down off high idle and it made a "snapping" noise through
the carbuerator - it then idled very rough and would not idle on it's own
- from then every time I would raise the RPM's it snapped like exhaust was
comming up through the carb (not like a carb backfire, very steady), upon
further inspection I found the plastic carb baseplate to be cracked, and the
gaskets were pushed out and leaking fuel. After researching carburators,
rebuild kits, etc. I decided to purchase a Edelbrok aluminum 4bbl intake
(non EGR) and a 600cfm Edelbrok 4bbl carb as a package, eleminating the egr and all smog accessories
thinking this would resolve the issue. It did not. The motor does run a lot
smoother but still has a miss and still snaps through the carb when raising
the RPM's.
My question is - what would this snapping noise through the carb be?
Iam under the impression that if the exhaust valves were hanging up,
there would not be any compression.
What am I missing?!
I do not think this an AMC specific problem so I am posting this on several different forums.
Thanks for any and all ideas...I'm ready to pull hair out!

 

moe in wichita ks
double check the spark plug wireing. check for vacuum leeks. check that there is a steel plate sandwitched between two gaskets under the carb. why? if the manifold is a spredbore style and the carb is a squarebore, and you only have one gasket,there will be acavity in the bottom of thecarb that is above a wall on the manifold when the gasket deforms it makes a vacuum leek. you HAVE to use Edelbrok gaskets and steel plate, the bottom gasket is not the same as most gaskets it must be made for the Edelbrokmanafold.

 

plug wiresX2 when they arc they make a snapping noise look for it when its darker out. It also may not even be the wires it could be the distributor or coil.