Skip the auto shop - Our mechanics make house calls

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.

A: Hi, thanks for writing in. I recommend list...

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 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: Key won't turn in the ignition 1978 Ford Mustang II

Hi there - there a couple of possible faults preventing your ignition key from turning in the ignition lock cylinder. First is that the key is sufficient worn, or the lock tumblers themselves, that they are simply not moving the...

Q: Firewall

It will be difficult to go through the firewall and the passenger cabin to the trunk because of the number of obstructions. If you are simply trying to bring power from the battery to the trunk, the best thing to...

Q: Truck wont run for more than a couple minutes at a time.

It sounds like you are losing fuel pressure, but if you've replaced everything you've mentioned (except the fuel pump relay) the first test I would perform is to see if you're losing spark. There may be several factors causing a...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...