1985 CJ7 4.2L
So I ran into some weird stuff today while driving. My DD is down with a cracked rim, so I'm stuck with the Jeep to get back and forth to work until next week, so hopefully I can get this ironed out tonight.
Here's what happens. I notice it in 4th gear or 5th gear under steady, constant speed. I can't tell you the mph because I don't trust my speedometer, but it happens around 1500 RPM in 5th gear and 2000 in 4th. While all seems good and well, I will be driving along and then it feels like someone has applied the brakes and the Jeep begins to decelerate. It doesn't die or turn off; I can put the clutch in and coast for a few seconds and it usually returns to normal, however, the longer I drive, the worse it gets. When I have the jeep sitting in my driveway, idling, it idles smooth and confident. However, when I approach a stop after this weird cut off scenario, it feels like it's misfiring all over the place. When I was driving down my street to get home just now, it happened, so I tried to downshift to 3rd and put my foot in it and see what happens, and that was the only time it died. But it started right back up while I was rolling. It feels like it's flooding out, as opposed to being starved for fuel, but if I adjust the idle mix screws anymore in, it begins to run like a tractor engine. I thought maybe the float was bad, but it floats nicely and is adjusted according to the rebuild kit instructions. I haven't tried replacing the needle yet. I'm kind of at a loss here fellas.
I've done the Teamrush upgrade and Nutter Bypass. Fuel pump and fuel filter are also new. I replaced the fuel lines from the pump to the carburetor, but everything else is original. I originally thought maybe I was getting starved for fuel, but it's not at high RPM, and it doesn't die, it just doesn't respond to throttle anymore. So that scenario seems less likely. I also don't want to condemn the ICM because the engine only died when I tried to force it through the hiccup. If I put the clutch in and let off, it gets back to normal and I can drive for about 30 more seconds before it happens again.
So I ran into some weird stuff today while driving. My DD is down with a cracked rim, so I'm stuck with the Jeep to get back and forth to work until next week, so hopefully I can get this ironed out tonight.
Here's what happens. I notice it in 4th gear or 5th gear under steady, constant speed. I can't tell you the mph because I don't trust my speedometer, but it happens around 1500 RPM in 5th gear and 2000 in 4th. While all seems good and well, I will be driving along and then it feels like someone has applied the brakes and the Jeep begins to decelerate. It doesn't die or turn off; I can put the clutch in and coast for a few seconds and it usually returns to normal, however, the longer I drive, the worse it gets. When I have the jeep sitting in my driveway, idling, it idles smooth and confident. However, when I approach a stop after this weird cut off scenario, it feels like it's misfiring all over the place. When I was driving down my street to get home just now, it happened, so I tried to downshift to 3rd and put my foot in it and see what happens, and that was the only time it died. But it started right back up while I was rolling. It feels like it's flooding out, as opposed to being starved for fuel, but if I adjust the idle mix screws anymore in, it begins to run like a tractor engine. I thought maybe the float was bad, but it floats nicely and is adjusted according to the rebuild kit instructions. I haven't tried replacing the needle yet. I'm kind of at a loss here fellas.
I've done the Teamrush upgrade and Nutter Bypass. Fuel pump and fuel filter are also new. I replaced the fuel lines from the pump to the carburetor, but everything else is original. I originally thought maybe I was getting starved for fuel, but it's not at high RPM, and it doesn't die, it just doesn't respond to throttle anymore. So that scenario seems less likely. I also don't want to condemn the ICM because the engine only died when I tried to force it through the hiccup. If I put the clutch in and let off, it gets back to normal and I can drive for about 30 more seconds before it happens again.