Why does my Harley hesitate when I start up?
One of those details might point right at a cause. – It starts just a little like it’s not warmed up right away but after it’s warm it gets bad. -If it starts to hesitate I accelerate and it goes away immediately till I let off and start cruising again.
What causes a misfire after a warm up?
Misfire After Warm Up: Misfire After Warm Up. Runs Great When Cold… Misfire after warm up. Runs great when cold. Has new engine new plugs wires injectors when starts misfiring can shut down start back up and runs fine until a few minutes then starts again. have the same problem? This sounds like you have an intake valve that is leaking.
Why does my engine stall after a warm-up?
Somewhere along the lines when the ECM switches its fuel map after it warms up, you are losing the mix. It is either the fuel you use, a vacuum leak you haven’t found, a bad ground or battery (or both), loose connection at a sensor or fuel pump. Vacuum leaks should have been taken care of when the engine was overhauled.
What does it mean when your engine hesitates under load?
An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. If the Check Engine Light comes on, you may find any of the following codes: P0171, P0174 Lean fuel condition codes P0120 to P0124 Throttle position sensor codes
What causes engine hesitation and stumble problems on the 90 +?
Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again. The car would then run faultlessly for the rest of the trip.
Somewhere along the lines when the ECM switches its fuel map after it warms up, you are losing the mix. It is either the fuel you use, a vacuum leak you haven’t found, a bad ground or battery (or both), loose connection at a sensor or fuel pump. Vacuum leaks should have been taken care of when the engine was overhauled.
An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. If the Check Engine Light comes on, you may find any of the following codes: P0171, P0174 Lean fuel condition codes P0120 to P0124 Throttle position sensor codes
Why does my ECM stop working after warm up?
Fuel/Air/Fire/Ignition in the right mix and correct order. Somewhere along the lines when the ECM switches its fuel map after it warms up, you are losing the mix. It is either the fuel you use, a vacuum leak you haven’t found, a bad ground or battery (or both), loose connection at a sensor or fuel pump.