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    Runs great but has a stumble at half throttle

    89 YJ Wrangler 2.5L - 19k miles on new engine. Runs great and has good power, except a slight stumble between 2k to 3k rpm. All vacuum leaks fixed. All sensors + TPS and Fuel Press Reg, and CPS replaced. Seems to run lean at mid range and part throttle. ECU rebuilt to new spec. Any ideas?
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    What is this sensor on my 89 Wrangler YJ 2.5?

    This sensor, on my 89 YJ 2.5L, is on the Firewall below the battery, and near the Vacuum Canister. The PO pulled the Hose, and cut the Sensor Wire. It has a Ground Lead going to the Firewall. Could not find it in my Jeep YH FSM. Thanks in Advance for Info!
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    89 YJ Fuel Line

    My 89 2.5L does not have a Fuel Rail, and I need to check the Fuel Pressure. Are there fittings, or a kit I can install, in order to connect my Fuel Pressure Gauge. I am told the pressure should be 14.6 psi, and excess should flow back to the tank via the return line. Do I have the lines labeled...
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    Rough Idle on 89 YJ 2.5L

    89 YJ has rough idle, but runs smooth in the higher RPM ranges. Pic attached of a Manifold and TBI (not mine but similar). When I spray Brake/Carb Cleaner at or near the Vacuum Tubes (arrow) the idle smooths out for a few seconds. Pretty sure this indicates a hairline crack in one of the tubes...
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