What RPM does the turbo kick in?
Discussion
Yesterday, I showed my car to my uncle, who bought 4 esprits new back in 88. Well, I guess it made him feel young again, because he was really slamming on the pedal. He got the RPMs very high...like 6500 a couple of times. After that, it seems the turbo only starts kicking on at about 4000 and seems weak. Before this, it would turn on as it approached the 3000 RPM mark, and really boosted the acceleration. What should it be at? Could the turbo have been damaged? Anyway to check its function? Maybe I am just getting used to the boost.
Ok, My car seems tuned fine, and has recently been serviced. I did change the air filter and spark plugs yesterday. The car seems to run just fine, but the turbo seems absent (The timing belt is fine). It does turn on, but it is not as powerful feeling. Mabey like there is a leak somewhere. When I push on the gas there is a significant amount of slack in the throttle cable. At the engine, there is enough slack to almost pull the cable right off. Could this cause these symptoms? Does the turbo kick on if you achieve a specifed RPM, or does it kick in if you achieve a specified RPM in a specified time? The latter circumstance would make that seem possible. Also, I found a vacuum line that was leaking. It was the one at the front on the the intake manifold that raps around to the drivers side and meets next to another vacuum line. That seemed to help, but I still think something else (throttle cable) is contributing to the problem. My uncles high RPM ordeal may not have pushed the car to it limit, it was only for about 1 second, but the oil light came on. We immediatly stopped the engine and restarted it, and all indicators were normal. He claimed that the throttle linkage was "stuck" (I did not mention that before) and reved the engine up while only going about 10 mph, which may be what is throwing the performance off now.
I checked the timing. Everything lines up and the belt is at a good tension. All is great there. I know this sounds stupid, but what/where is the plenium? Is it tough to open, and will I need to buy a gasket to put it back together? I will check that today...once I know what it is. The throttle seems very loose.
Ok.... I believe my oil light came on because the pump could not keep up with the RPM of the engine, and it was there as a warning. But, it did turn off immediatly. The car idles with oil pressure around 4, but when moving, it is up to 5. The car always runs at about 80C. The boost gauge will get up to .65 bar, but is is just slightly delayed and not quite as quick to boost up. I did take the plenium off, and am repainting all of that stuff orange again. My cable adjuster was at the maximun adjustment, and there was a good inch of slack in the cable still. I am positive that is as bad as it could get. The symptoms, I believe started when the car was reved up. Then again.....I could have disrupted an old vacuum line putting in the alternator last week. I am going to make sure the plenium is sealed tight, because it sounded like one of the hoses going to it was sucking in air around the edge, and did has a small tear in it. And maybe that was compounded by the terribly loose throttle cable. Where can I get a new cable/ or shorten this one and inch?
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