Jeep will not run after new carb and distributor, PICS
Ok I have posted several times on this but now I have everything installed on my 98 jeep yj 4.2L 258. but I am not having any luck getting it to fire.... My first guess is that I have the timing off. I do have fuel flow, it took awhile and a mouth full of gas but it is pumping.
I will explaine both the carb and the dist in pictures below.
This is a new engine to me, it has about 35000 miles on it.
I installed a new:
CRT Performance HEI Distributor
New exhaust manifold and new Valve cover
Carb install specs:
I installed the vacume lines per the diagram on the 32/36 sticky
I came off of the CTO valve in two places with a T like shown in the diagram from there I went to another T one into the carb vac port on the right side in the picture and than to the vacume advance on the carb
off of the valve in the spacer below the carb to the PCV valve and than down to the charcoal canister
straight to canister
from CTO to EGR valve (i do not have and EGR tube so I plugged the hole with a bolt until I can get one)
Hose to the right is fuel
hose to the lower left with T is the vac advance
hose on the top left is carb vent directly to canister as well
Distributor (CRT Performance HEI)
This engine had the distributor removed when I got it so I had to find TDC on my own. I put my finger over the 1st cyl spark plug hole and turned the engine until I felt the air. When I checked the timing the line was at 0 TDC. I would assume this means I found the TDC of the 1st cyl.
from there I installed the dist with the vacume advance facing the passanger fender, took off the cap and marked the first point based on the rotar button. installed the wires 153624. I do get a spark.
so I get nothing....... it turns and I hear a carb pop every 10 seconds or so and a little bump but nothing that sounds like it is going to fire. I even tried turning the dist 180 Deg out but still nothing. The plugs are flat black not wet.
On the air coming out on number one, remember you will get that 2 times. One on compression and one on the exhaust stroke. Make sure that you get a suction first than a compression. You could have stab the dist on the compression stroke.
90 YJ, 4.2 with 2150 carb 4.0 Head and headers, Nutter with TFI and MSD. 1" BL, 2.5" spring lift, 33", Goodrich KM Mud Tires. Dana 30 w Aussie, Ford 8.8 w LS. 9000lb HF Winch.
It is not hard to turn, I pulled the plugs and re-gapped per the spec around .045-.050, I am going to make sure I am on TDC and try turning the dist while having someone else crank it, I was by myself last night so it wsa hard to do....
can someone tell me if I have the vacumes hooked up right per the labeled photo above??
Right off the bat I can tell you that you have your advance for the distributor hooked up wrong, but it's an easy mistake when you look at the diagram. You need to connect it to the port that is listed as "EGR" and cap the "vacuum advance" port. It may not make sense now but I will explain it below the image if you would like to know why.
The Weber 32/36 is commonly used as an upgrade on British made MG cars with carburated engines which use Manifold vacuum (starts out high at idle and decreases as engine RPM increases) to alter the speed of the distribution and "advance" it. While most American engines (including the AMC 4.2) use Ported vacuum (starts out at near zero at idle and is highest at WOT) to advance the timing. This should not prevent the engine from running, but once it is it will increase the performance of the engine once it is running.
On another note it is hard to tell if you have your electric choke hooked up from the picture you posted.
1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped. Daily Driver since April 23rd, 2003