Q: Car won't start after I changed the fuel pump. It was dying and back firing before I changed it. Could it just be low on gas now?

asked by on

Could I just need gas in it or could it be something else? I tried to use starter fluid to start it. That didn't work, it caught on fire but did bit start.

My car has 198754 miles.
My car has an automatic transmission.

Hi, thanks for writing in. I recommend listening to hear if the fuel pump is running during cranking, and checking fuel pressure. Should be at least 10 psi. If the pump is not running, check the fuel pump fuse(s) and relay, and for voltage to the pump. This engine also uses an oil pressure cutoff switch - no oil pressure, no fuel pump operation (safety issue).

What symptoms led to replacing the fuel pump? Didn’t hear the fuel pump run? Problem code for low/no fuel pressure? Even though this vehicle is pre-OBD II, problem codes are set and can be extracted. It is best to extract the problem codes now to determine what the current problem state is.

"Dying and backfiring" are symptoms of a lean mix, but could also be a problem if the car has jumped the timing, or there are big air leaks in the intake (e.g. EGR valve stuck). If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Car won't start after I changed the fuel pump. It was dying and back firing before I changed it. Could it just be low on gas now?

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 overheated and blew out coolant

Coolant can leak from a variety of places. The system, when warm, is under pressure; 22 psi on your A4 Quattro. Even when the engine is at normal operating temperature, when a sudden leak occurs, it can “blow” everywhere. If...

Q: I have a 93 Cutlass Ciera with a th125c transmission that wont shift out of first, a solenoid inside causing the vehicle not to change.

Hi there. The issue with the transmission is either the downshift cable is out of adjustment or the governor is leaking. Check the downshift cable and see if its too tight. If its too tight, the cable will need to...

Q: Hi I am changing the top Radiator Hose to my mothers 94 Oldsmobile.. I see 2 clamps and the shorter hose.. That's what I bought an

Hello, and thank you for writing in. Bleeding the cooling system is a process of removing the air from the system by allowing the thermostat to open and flush any air out. There is a bleeder screw located next to...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.