1.8L engine output

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Apr 8, 2001 | 09:42 AM

john s

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1.8L engine output

<center><img src="http://im1.shutterfly.com/procserv?si=00002937301920010408033951855.JPG&cb=1 5066852&ph=59621&cr=0.0,0.0,1.0,1.0&r=0&p=1&pa=0.5 &b=1&bw=0.2&sa=0&ps=3&po=0&g=2.2&q=80&rx=644&ry=56 3"></center><p>Anyone here with a similar problem? Made a few posts on the TT site, but no answers. When I checked my engine a few weeks ago it was regulating to 265 Nm instead of the spec of 280. Now it's regulating to 257 Nm. Before the torque gets to the regulation speed range (2200 to 5500 rpm) the duty cycle on N75 is over 95% then it backs down to 60% as the engine speed rises. Boost is being regulated to 1.8 bar. With quick acceleration in the low gears I can get spikes to 2.1 to 2.2 bar (with torques in the 270's) but N75 quickly backs off on duty cycle and the boost drops.

Apr 8, 2001 | 01:51 PM

john s

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Boost regulation

<center><img src="http://im1.shutterfly.com/procserv?si=00002937301920010408211708978.JPG&ps=0 &rx=640&ry=480"></center><p>Power is down because ECU is regulating it that way. Is this typical? Traveling is 6th gear, throttle closed, speed dropping. Open throttle slightly to maintain speed, 186 second point. WOT @ about 189 second point. Pressure builds, above 2200 rpm pressure is greater than command pressure. Wastegate is activated, takes almost 2 seconds. Pressure is held at command pressure. Torque is only 257 Nm, spec is 280 Nm.