Being told that my fuel pump is going bad which I replaced a year and a half ago truck runs perfect and runs great for 30 or 60 or even 100 miles and then it starts to lose power it'll drop from 60 to 50 miles an hour start to bog down a little and being told it's the fuel pump but it doesn't make sense to me I've been traveling across country for nine days trying to figure this problem out someone said it might be catalytic converter starting to go bad I'm at a loss I'm about to pay 600 bucks to have a new pump put in I had a fuel pump gauge tester put on and it went up to where it should and then the gauge just dropped and the needle started bouncing around and then back up and the guy said that's indication of the pump going bad I didn't know pumps could keep working and then just I thought they were either on or off or starting problems which line starts fine every time need help thanks

 

You need to get a live data stream so you can visually see what is happening in there. You can assume it is the fuel pump, but you just replaced it and OEM's last 20 years. If it is so intermittent it may be something else that live data could show you. Bad ground, short, any number of other parameters.

Does it go into "limp mode" or just bog down and then recover? Does turning the truck off then restarting "cure" it for a while?

If you cat is going bad then live data would also show that with the down stream O2 sensors.

ForScan may be able to show all this live data or buy a good scan tool or find an indie shop with a good scanner for a small fee. I would not like to see you **** away money on a new pump and it not be the problem.

 

Truck starts up and runs great down the highway going 65 mph on cruise pulling a camper and then out of the blue been either 30 miles or 60 miles in a day sometimes 100 it just starts to bog down the truck is never not started it seems to run great it has not died even when this problem has occurred a mechanic put a gas pressure valve tester on it said that the pump was starting to go bad I just it's been a thousand miles since I left Michigan this has been going on every day it seems like a pump would just give out or not work the last time I pump went bad it just got to where I couldn't start the truck anymore and I have none of that going on I'm more inclined to think it might be catalytic converter starting to back up with back pressure coming back in towards the engine after a while and causing it to feel like a mess or a power loss don't know thank you

 

Is your Check engine light on? Did it flash or stay on? There has to be codes if it running like this.

ForScan is free and can give you all the Trouble Codes and lots more.

Another site suggested the the Fuel Pressure Regulator as the culprit. Under acceleration, the vehicle should accelerate smoothly no matter how hard or light the gas pedal is depressed. If the Ford will not accelerate smoothly, but instead jerks and jumps under acceleration, your fuel pressure regulator should be inspected.

Did you install a cheapo fuel pump?

It could be a lot of other things.

Loss of power Inspection Service

When your vehicle begins running rough at stoplights or hesitates while driving down the highway, it is not just annoying, it is a sign of your car needing further attention. Unfortunately, simply knowing there is a problem isn’t enough to make it go away. Since there are a variety of issues that can cause a loss of power, it is vital to narrow down the issue to a particular system.

Common reasons for this to happen:

• Defective fuel pump or filter: Since the fuel pump is responsible for supplying your vehicle with fuel, it can cause a loss of power when it begins to wear out or when the in-tank filter becomes clogged and prevents the free flow of fuel. When the fuel pump is failing or unable to push fuel through the filter, your car will sometimes make sputtering noises at high speeds, act like it is going to stall as you accelerate from a stop, or simply stop running when it is under the stress of a hill or heavy load.
  
• Vacuum leak: When a vacuum leak is present in your vehicle, it interferes with the computer’s ability to regulate the air-to-fuel ratio, which can sometimes lead to power loss. Such leaks will frequently cause the Check Engine” light to come on, and you can usually hear a hissing noise come from the engine area if you listen closely under the hood of your vehicle.
  
• Ignition system: When the ignition system is malfunctioning, your vehicle may also have problems starting periodically in addition to power loss. Frequently, a tune-up will solve this problem, but it is important to have a qualified mechanic with the proper diagnostic tools check the system as a whole. Modern tune-ups typically involve replacing fewer parts than years past, but with more attention being paid to the fuel injection system at the same time.
  
• Timing belt or chain: A worn timing belt or chain can cause the valves on your engine to open and close at the wrong intervals, sometimes resulting in a loss of power. When the timing is off, it is frequently accompanied by a slight clattering noise at the front of the engine.
  
• Catalytic converter: When the catalytic convertor fails or become clogged, it prevents proper air flow through the engine, which can cause power losses. Aside from a loss of power, your car may also run at a higher temperature than usual or have an erratic idle. A mechanic can easily check your catalytic convertor with a vacuum gauge to determine if it is functioning properly.
  
• Airflow sensor: When your airflow sensor is failing or dirty, it can send wrong signals to your engine’s computer that can result in power losses while accelerating. This type of issue usually causes your Check Engine” light to come on and your vehicle to behave sluggishly even when there is power.
  

 

So you have tested the pump and seen the pressure fall, a mechanic tested it and told you it was bad and yet here you are asking people who have not tested the pump if you pump is ok ? Hmmm, ok I will play.
your fuel is just fine, keep looking for the obvious fix.












































not