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Here is a trick for testing COP coils that I learned from a Nissan service bulletin: you can disconnect the individual coils while the engine is running to find a faulty coil, in fact an EFI/COP 4 cyl _ engine will run (idle) with just one coil connected as long as it is a healthy coil with a good spark plug. I assume that an EVO has Coil on plug ignition. If it pressurizes quickly or the tank level rises it could be a faulty HG. Immediately go check and see if the cooling system pressurizes, and if it has a pressurized coolant tank, see if the level rises. Before doing anything else, open the radiator or coolant tank cap and check coolant level. Each manifold is molded with smooth transitions from the throttle body opening to the plenum to the runners with clean parting lines for an optimal finish, both inside and out and features a genuine Skunk2 nameplate.This is what I would do for quick & dirty diagnostics:Ĭheck it out when the engine is completely cold.
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MOTOR SPORTS EVOM PRO
Similar to OEM manifolds, Skunk2’s Pro Series Intake Manifolds are shell-molded from 356-aluminum, CNC-machined for superior strength, a precise fit, and a high-quality finish, and vacuum-tested for quality. Skunk2 is a familiar name in the intake manifold business, with more than 10 years of experience designing, testing, and building them. Pro Series Intake Manifolds also include the necessary provisions for the Evo’s brake booster line, MDP sensor, and vacuum accessories (EGR valve excluded), and incorporate two additional 1/8-inch NPT threaded ports, which can be used for any number of vacuum/boost-related devices such as gauges, boost controllers, and more.Each manifold comes equipped with plugs and fittings as well as a dipstick k relocator. Unlike other intake manifolds, Skunk2’s incorporates the factory configuration, leaving the throttle body in its original location, which means the original intercooler piping and hoses can be reused. Skunk2’s Evo Pro Series Intake Manifold is a simple bolt-on affair. The Pro Series Intake Manifold’s unique design increases wave scavenging effects at the engine’s ideal operating range, which allow for a broad increase in usable power.
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Pro Series Intake Manifolds also feature thicker castings when compared to the OEM piece, which leaves plenty of room for porting, and each runner exit is machined and hand-finished to best match the cylinder head’s ports. Peak gains as high as 33+ whp have been realized when paired with Pro Series Throttle Bodies with positive results across the board, beginning as low as 3,200 rpm. Its all-new Pro Series Intake Manifold features OEM-length runners with larger bores and a special tapered design as well as a larger, tapered plenum that together preserve mid-range power but increase and accelerate airflow to allow for significant top-end gains. Conventional large-plenum, short-runner intake manifolds provide top-end power gains but suffer in the mid-range. Skunk2’s all-new, cast-aluminum Evo Pro Series Intake Manifold-which was tested and developed on the company’s own Evo Time Attack race car-is a direct-fit replacement and offers significant horsepower and torque gains without compromising mid-range power output.
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Skunk2’s newly designed Evo Pro Series Intake Manifold was designed with “street enthusiasts” who utilize turbochargers as small as the factory unit in mind and want more power without sacrificing mid-range performance. The intake manifold solution street-driven Evo VIII-IX owners have been waiting for is here.