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Are you sure it's the AMM? Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Mon, 12 May 2003 09:46:35 In Reply to: AMM died!, SDP, Mon, 12 May 2003 06:04:43 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Boost is a function of engine speed and airflow through the turbo. The AMM simply measures airflow and schedules fuel. Now, if the AMM died to the point where it wasn't scheduling fuel, it would be hard to get a lot of RPMS. But there are backups for the AMM - if you really nail the gas, the engine control figures out the AMM is dead and makes a guess at the right amount of fuel. You should still get boost.
When you say no boost, how 'no boost' is it? It only gets into the yellow? It never gets to yellow?
Yellow is boost. Believe it or not, even having the needle in the white is boost. If the needle gets up near the white/yellow gap when driving, then the turbo is producing some boost. That's because a non-turbo engine's intake runs at vacuum. In order to get near the white/yellow gap (atmospheric pressure) either the turbo is doing some boost, or the throttle is wide open and the engine is turning very fast.
Just make sure it's the AMM that's the bad guy here.
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