Skip the auto shop - Our mechanics make house calls

Q: My truck cranks but is slow to start. It idles rough and stalls out. I've already replaced my fuel pump - what could it be? 1997 Dodge Ram 1500

asked by on

I have to turn my key multiple times to get my truck to start it would turn over but not start but after a couple times and I would have to keep my foot on the gas to keep it at idle it runs pretty loud to. But I thought it was my fuel pump but I changed that out still same issue. Also changed the TPS sensor.

A: Hello - I believe your problem is low fuel ...

Hello - I believe your problem is low fuel pressure, at least during the cranking phase. If the fuel pump check valve is not maintaining pressure in the fuel system while the engine is turned off, cranking time is long while the pump builds pressure. A dirty fuel filter, fuel pump relay with burned contacts, or malfunctioning fuel pressure regulator (fuel pressure low) may also be an issue here. On the air intake side, a dirty throttle body, and/or idle control valve would also create poor idling and stalling. I would recommend a thorough fuel system and air intake system inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Issue involving spongy brakes after multiple bleeds.

You may have rear brakes out of adjustment. I'd try to adjust them until you get a light drag on the drums. Check both front calipers to make sure the slides are free and lubed well. Then you should have...

Q: Truck not moving

Hi. This issue could be a drum or caliber hanging up. Road dirt and debris is normally the cause of this issue. Jack the vehicle up and place on jack stands. Inspect the brakes for any gripping with the rotors,...

Q: Van loses power constantly - 2008 Dodge Sprinter

Is the Check Engine Light on, or is there any warning sign other than the power loss itself? One area to consider is to make sure all of the basic maintenance of the vehicle is up to date; This includes...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...