I put a car together two years ago using an 89 IS vert for a donor. The engine and trans had 185k miles. After putting my car together it dynoed at 132 whp. I only changed the oil, plugs, plugwires, rotor and cap. After the first year I put a 220k mile engine in the car, don’t ask. I dynoed the car at a different dyno facility but still on a Dynojet. It dynoed at 133 hp. I did compression tests on both engines. The cylinders were within 5-10 psi of each other. However, I did a leak down on both. My first motor’s valves and rings leaked bad. The second engine’s valves were tight but the rings were leaky. I’ve since decided to rebuild the first engine. For some reason I ha e a feeling the rebuilt motor is going to put down the same power and I have something else going on with the car than the engine itself. Both motors had brand new injectors and fuel regulator as well. My A/F was around 12-13 with no dips.
How do you check the TPS?