The Green Jeep - 94 YJ Sahara

Love some GM. Glad yall had a good trip!
 
Let’s see if this help air flow under the hood. If anything it looks mildly cool and adds 10HP because it came with two stickers.
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Noel said:
Got ya, I rarely overheat but I’m not running fenders at all. Was thinking about doing the vents too to help with the heat. Mine sits outside most of the time so idk that I wanna do it.
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Yeah this hasn’t been an overheating issue. Mechanical fan and oem shroud works great. Just have had issues with vapor lock due to all the heat trapped in the engine bay.

I did mount these further back than the instructions specify so that the louvers were right over the engine and I left the drip trays out since it stays in the shop. But the motobilt kit does have them to keep water off the engine if it sits outside a lot.
 
StretchASU said:
Yeah this hasn’t been an overheating issue. Mechanical fan and oem shroud works great. Just have had issues with vapor lock due to all the heat trapped in the engine bay.

I did mount these further back than the instructions specify so that the louvers were right over the engine and I left the drip trays out since it stays in the shop. But the motobilt kit does have them to keep water off the engine if it sits outside a lot.
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Yea, I’ve seen your heat soak problems. Surely it will fix that. Had the same happen with a wj before. Simply popping the hood and leaving it on the safety latch while wheeling would solve it. The v8 in mine stays pretty good. Just a few times it got hot. But probably need a cooler thermostat to start with
 
Good trip to Harlan this weekend with a bunch of folks. Mid to high 80’s both days was a good test and the vapor lock issues are gone even after pulling the long climbs on the access roads running from Putney up the Mtn and the same going from Evarts back up to the top and out to Mason Jar. Put some good miles on the YJ without much issue.

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I'm fighting the vapor lock issue now the weather is hot. I've got all sorts of insulation on fuel lines, fuel rail , injectors, ... I've got the hood vented, rerouted the exhaust and it still does it after a long climb. I think mine is due to the AW4 building a shit ton of heat and I still have complete inner fenders. I've got a set of Genright AL flat fenders I'm going to throw on there and do away with the inner fenders altogether, hopefully that will help or solve the issue.
 
BIGWOODY said:
I'm fighting the vapor lock issue now the weather is hot. I've got all sorts of insulation on fuel lines, fuel rail , injectors, ... I've got the hood vented, rerouted the exhaust and it still does it after a long climb. I think mine is due to the AW4 building a shit ton of heat and I still have complete inner fenders. I've got a set of Genright AL flat fenders I'm going to throw on there and do away with the inner fenders altogether, hopefully that will help or solve the issue.
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Internal stock style pump or external E2000/inline? I learned during the whole fuel line mess on this that the inline pumps sometimes have a small screen on the inlet and it gave the same symptoms just under different conditions. Any crud on that inlet screen and it had good enough fuel pressure to run to about 2800rpm then fell on its face. Fuel temp in the cell might be an issue too. I think Austin had to build a heat shield around his cell on one of the out west trips.
 
StretchASU said:
Internal stock style pump or external E2000/inline? I learned during the whole fuel line mess on this that the inline pumps sometimes have a small screen on the inlet and it gave the same symptoms just under different conditions. Any crud on that inlet screen and it had good enough fuel pressure to run to about 2800rpm then fell on its face. Fuel temp in the cell might be an issue too. I think Austin had to build a heat shield around his cell on one of the out west trips.
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Stock pump set up in a motobuilt fuel cell (behind rear seat).
 
Correct. I ended up soaking the fuel cell in ice bags and cold hotel towels with an umbrella and carried on Mary Poppins style until I got home. Once I got back, MarsFab built an awesome aluminum enclosure lined with insulation to keep it from baking in the sun (there was an air gap between them also). Fixed my issue entirely and I ran and E2000 under the tub. No inner fenders. Fuel rail wasn't wrapped and no hood vent for what its worth.

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SPOA87YJ said:
Correct. I ended up soaking the fuel cell in ice bags and cold hotel towels with an umbrella and carried on Mary Poppins style until I got home. Once I got back, MarsFab built an awesome aluminum enclosure lined with insulation to keep it from baking in the sun (there was an air gap between them also). Fixed my issue entirely and I ran and E2000 under the tub. No inner fenders. Fuel rail wasn't wrapped and no hood vent for what its worth.

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Dang. Mason Jar looks rough as hell these days
 
I had issues a few years ago. Updated all the hoses, belts, thermo, even put a new fan motor on it, as well as poison spider hood loovers(sure gets hot in the seat without the windshield though) Depends on engine type and fuel pump, but My old CJ had issues with heat also, and putting the fuel filter with a return back to the tank Returns any fuel over what can be used) , back on it. No more vapor lock.
 
Recycling parts off the CYJ build since they’re still laying around. The front leafs on this thing were bent and pretty clapped out. Some RE1444’s with the bottom leaf removed worked great to fix that issue and not raise the front much as it sits maybe 3/4-1” higher now so it’s pretty level with the back.

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