Q: Is it a fuel pump issue?

asked by on November 28, 2016

My truck will stall when the rpm goes below 700. No check engine light comes on. Temperature is fine. Oil and gas are fine. I cannot strt the engine again without doing this method: press down on the gas pedal, take foot off gas pedal, and then press down halfway on gas pedal while turning key. I don't hear any strange sounds. No smells.

My car has 169000 miles.
My car has an automatic transmission.

It’s possible that a failing fuel pump, or a clogged fuel filter or fuel injectors for that matter, can cause stalling at idle but there are other common causes such as vacuum leaks, EGR system faults, sensor faults such as the mass airflow sensor, as well as problems with the throttle position sensor and idle air control valve. Although the check engine light is not on, a Mechanic would still look for stored or "pending" codes to aid the diagnosis. A certified professional from YourMechanic would simply test each of these systems methodically, in turn, until the fault is found. It should be pretty easy in your case because you are not describing an intermittent problem, that is the fault is always there below 700 RPM and thus one of these systems is going to report "out of range" once tested per FSM (Factory Service Manual) specifications.

Was this answer helpful?
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

smog test incomplete.

If your Check Engine Light is not illuminated, there is not a fault with the system. Before a vehicle can pass emissions testing, certain readiness monitors must be completed. One of which is the heater O2 monitor. The vehicle will...

Muffler is loud and the van jumps when in idle. When it jumps the muffler makes a puffing noise and smells.

This may be related to a failing catalytic converter or potentially a dirty or failing idle air control valve. The idle air control valve reads the air intake as it enters the motor and relays this information to the computer...

Third ignition coil not getting power

Coil packs are usually mounted on an ignition control module that controls the signals for the coil packs to fire. If the coil is good just not working the module may be the problem. Along with the module being tested...

Related articles

2012 Toyota Sienna vs. 2012 Dodge Grand Caravan: Which One Should I Buy?
The battle of the minivans: Toyota Sienna versus the Dodge Grand Caravan. Both of these comfy people-movers provide options galore, and the minivan is meant to get everyone where they need to go safely and quickly, at a reasonable cost...
How Can You Tell That Your Fuel Pump Isn’t Working?
The The fuel pump is responsible for getting fuel out of the gas tank and up to the engine. The pump itself is usually located inside the gas tank. There are a handful of symptoms to look out for that...
The Best Used Cars to Buy If You Have 3 or More Kids
If If you have three or more kids, you could probably get by with a mid-size sedan if all you want to do is take them from Point A to Point B. Realistically, though, having kids means music lessons, athletics,...