Question about Chevrolet Silverado 3500HD
My duramax shuts down to 2000rpms and when it does it I can't get over 65mph. A new supply pump has been put in the tank, new ecm, new injectors, new map sensor, and new electrical 90 degree conectors to the injectors and I still having the same trouble. When it shuts down to 2000rpms, it shows to be low fuel rail pressure
Try hooking up a fuel pressure test gauge to fuel rail pre filter and post filter and rev truck to 2500 rpm what is fuel pressure ?
next using a vacume pump attach to fuel pressure regulator pump up while engine is running only pump up to 8 psi to see if pressure changes if not replace pressure regulator .
it could also be ur speed sensor switch on overdrive transmission
good luck with it
Posted on Jun 30, 2008
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sorry but I believe you have this posted in the wrong product
category? Please re-post the question in the proper category if this
is the case, otherwise you have my apologies. This is the car and
truck problem category
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