Skip the auto shop - Our mechanics make house calls

Q: Vehicle stalls, loss of power, rough idle.

asked by on

Pete I have a 1995 Chevy pickup, automatic, with the 5.7. It has a rough idle when in gear but not moving it also stalls usually while making left turns, when it's getting ready to stall the tachometer will get really bouncy. What I mean by bouncy is that the tach will swing up to 5k and back down to 1k without the engine throttling up or down any. Sometimes in a small turn it will die not a big enough turn to stall the engine because of power steering pump issues it seems more like an electrical problem. I have gotten the trouble code 54 from the ecm. I have recently swapped the motor out, replaced distributor, dist cap, module, rotor, wires, plugs, fuel pump, rebuilt the throttle body, fuel filter, both temp. sensors, egr valve, mapp sensor, all with new parts. I Neglected to mention before I swapped engines I did a complete rebuild of the used engine. New pistons, rings, cam, lifters, timing chain and sprockets, oil pump, and all gaskets. I have more info that doesn't fit in the box

My car has 180000 miles.
My car has an automatic transmission.

Hello, As you may know, code 54 relates to the fuel pump relay which means that there is likely a faulty connection or low voltage to the fuel pump relay. The ECM monitors the voltage to the fuel pump from the fuel pump relay. If the voltage is below specification code 54 will be triggered. I would suggest check power to the fuel pump relay to be sure there is proper voltage there.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car makes knocking noise

A knock is never good to hear on a car and could mean catastrophic failure in the engine. It could be something simple like something coming loose and knocking in the engine compartment, but it could also be something as...

Q: The car struggles to accelerate, and it stalled out last night before I shut the car off.

What you are describing sounds like a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information...

Q: Very sluggish almost dies on idle till I get to about 20 mph, have replaced ignition module, plugs, rotor and distributor cap.

This is a sign of a failing idle air control valve. This is a unit that is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.