Runs great at idle but as soon as i get going down the road about 3-5 min after normal driving it falls on its face and die soon after but after i start it back up it runs great for about 3-5 min and then it repeats its self i changed the injector the fuel pump seems fine did a fuel psi check and every thing but can not find a problem and now check engine light 4.3 vortec 95 ladder year
Possibly the fuel filter is slowly plugging up while driving to the point of starving the engine, and when engine stops pressure slowly backfeeds the filter to slightly unplug ..enough to start and run for another couple of minutes.. also check EGR valve for sticking open sometimes a piece of carbon will hold the pintle open causing it to stall..also I know you checked fuel pressure but monitor it to see if it drops off after going down the road...I have seen this where fuel pump gives pressure but not enough after a while, this was caused by a torn pulsator which is the rubber connector between the pump and the fuel line inside the fuel tank...Good luck
Check the vacuum lines on the engine.sometimes these will crack or develop a small hole or break and it will **** too much air in the engine causing it to act that way.
285 views
Usually answered in minutes!
×