Question about 2001 GMC Yukon XL
Fuel pressure at port above engine is 32 when turning to ACC and running. I am told it should be 58-62. I am having low end power issues when taking off. Power slowly returns around 2000-3000rpms but never comes back 100%. I have changed the fuel filter, spark plugs, and spark plugs wires. I also cleaned the air filter. Told it could be PCM, positioning sensor, and fuel pump. Why fuel pump? I have fuel pressure (granted it is low) and truck runs. How PCM? I am not maxing the system out for it to blow by the relief. How positioning sensor? Truck doesn't stall and only has issues on acceleration from stop.
I'm surprised it even starts, fuel pressure is vital for proper atomisation of fuel, i would start there
Posted on May 26, 2010
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Posted on Jan 02, 2017
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