Engine Performance problem
1983 Jeep CJ7 V8 Four Wheel Drive Manual 200000 miles
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I installed a Chevy 1994 5.7L engine in to my jeep. When hot the jeep spudders really bad and sometimes dies. If I let the jeep set for about 30 minutes or more, it will restart. However, it more common when going up an incline I get a lose of power and feels like it is starving for fuel.
I was wondering if I was experiencing vapor lock since it does restart after it cools off. However, it is a TBI. Since this is a transplant, I did install an electric fuel pump from Napa Auto. However, I did not install a fuel regulator. Where is the regulator suppport to go and can this cause the problem?

Thank you for any input you can provide.
Rob

Check the fuel pressure and also for restriction in the exhaust system-

I noticed that the catalytic converter is bluish purple in color too. I've read other forums that the return line on a non-tbi is to small when converting to a tbi system. Is this true? I'll looking at buying a fuel pressure guage so I can check the psi at the tbi.
Is the pressure regulator built in to the tbi or is it external?

Its in the TBI unit- Test the fuel pressure and comeback with the readings.

will do. It will most likely be later this week. I have to order a guage.

Can the catalytic converter be causing any of the exhaust restriction you mentioned prior? I don't get the strong sulfer smell, but I noticed the discoloration of it.

Can a smaller return fuel line cause a back pressure?

rasmataz wrote:

Its in the TBI unit- Test the fuel pressure and comeback with the readings.

I finally received and installed my fuel pressure gauge. When I turn the key to running position, I get 5psi. When I start the engine, I get 8psi. Sounds like my pump is a little short of the 13psi.

My current pump is a universal pump from Riebes. Doing some more research, I find that the Master E8153 pump is recommended pump for my conversion.