There is a misfire in my engine, changed plugs & wires. now it reads that the fuel leveling sensor is bad, will this help?

do you want gue$$ or how to test using TOOLS?
4 engines but told it YEAH. 3.2L
check all fuses first. a 20cent part, we test them 1 of 3 ways (ask)
flashing CEL means , CATS are going to run way too hot and may be damaged, means dont drive it far.

you failed to tell the 4 O2 DTC errors..
there are 2 kinds, heater or sensor out (cell) voltage
which one is key to the problem why do that>?
O2 sensors all 4 failing to me (blind) smacks of heaters shorted. (or the wires to them 1 wire shorted can short them all out) and is never good this.
you have p0300 errors to, ? or just 1 code p030x
where x is a number 1 to 6 and is always the same exact number, again no DTC told just vague.
questions all I have are those, blind must ask them ok.?
ever get a full tuneup 19 years.?
for sure spark plugs and filters and fan belt.(serp)
on this 3.2L the O2 heaters shorted blow 2 fuses
pre O2 or Post 02 fuses. so seems not this. hoodbox

ESP mind meld 1:
misfire codes P030x (x = 0 to max or 6)
if one fails it means that cylinder # has weak
combustion. or if p0300 all are.
caused by
that cylinders is bad, (example burned head valves)
and low compression tests (below 150psi) or vacuum test gauge shows, vacuum bouncing like mad,. oops
bad engine.

or bad spark (never did a tune up here ,bingo)
and last bad fueling if fuel is too lean on all 6
we see po300 and lean burn codes p017x or LTFT long term fuel trim way off at +xx huge %
or too rich fuel and misfires (on all or just 1 cyl)
or just one injector is dead , leaks or is 1/2 clogged

lacking any list of all DTC failing,all i can do is say how to do the tests. (engine,spark ,fueling)
scan the PCM
write down all DTC found
and share them all, skip none..

A misfire could be caused by a bad , clogged fuel injector . A vacuum leak . How are you reading a misfire ? A code ? A dirty mass air flow sensor can cause misfires . Low fuel pressure ,clogged fuel filter . When you replaced the fuel pump did you replace the ceramic sending unit resistor card with a new one ?
Fuel Gage
The IPC displays the fuel level as determined by the PCM- engine computer. The IPC -instrument panel cluster receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
?€¢
The PCM detects a malfunction in the fuel level sensor circuit.

?€¢
The IPC detects a loss of class 2 communications with the PCM.

When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description will further explain how the system functions. Refer to Fuel System Description .
Do you know about class 2 serial data communication .
Do

How about a Vehicle & Motor & test results

Scan Tool Data would help

Misfire Counts,Fuel Trim,vehicle maintenance history

If you have a Chevy Blazer- the fuel pressure regulator
& spyder are under the intake & could be the problem

Lots on the internet on that & video

You have OBD Codes-what are they? Google them

Don't see how you would think changing the spark plugs
would be the only issue

I answered this already

If a MIL Lamp is flashing please do not use the car

That on a ford that is called a Class A Cylinder misfire & will
destroy your exhaust converter, as well as possible other
engine damage,work on the misfire issues

An intake vacuum leak can cause this as well as other issues, read about it below.
Check Engine Light On, P0300 Random Misfire Code A random misfire means your engine is misfiring, but that the problem is not isolated to one or two cylinders. It is jumping around in a random way from one cylinder to another. A random misfire code usually means the air/fuel mixture is running lean. But the cause might be anything from a hard-to-find vacuum leak to dirty fuel injectors, low fuel pressure, a weak ignition coil, bad plug wires, or compression problems. Even a dirty MAF sensor can cause a lean code and/or misfire to occur. The engine may be stalling because it isn't getting enough throttle opening. The cause is often a problem in the idle air control system. The first thing to check is the intake vacuum with a vacuum gauge. On most vehicles a normal reading is 17 to 21 inches Hg. If the needle is lower, is jumping up and down or steadily dropping, you have a vacuum problem. Look for possible vacuum leaks by checking vacuum hose connections, the throttle body and manifold, and PVC valve and plumbing. An EGR valve that is leaking can also act like a vacuum leak and cause a random misfire. The next thing you should check is the fuel pressure with a gauge. If it is not within specifications (refer to a service manual for specifics because fuel pressure is critical for proper engine performance), the problem may be a weak fuel pump, low voltage to the pump (check the relay and wiring), or obstructions in the fuel line (like a plugged filter). A bad fuel pressure relay can also leak pressure and prevent an otherwise good fuel pump from delivering full pressure to the injectors. Dirty injectors can also restrict fuel delivery and cause a lean fuel condition. Many regular grades of gasoline do not contain adequate levels of detergent to keep the injectors clean. Frequent short trip driving accelerates the buildup of injector deposits. Cleaning the injectors with a good quality fuel tank additive (or having them professionally cleaned) can solve this problem. Look at short term fuel trim (STFT) and long term fuel trim (LTFT) with your AutoTap Express DIY. If the numbers are high, it tells you the engine is running lean

P0300 Random/Multiple Cylinder Misfire Detected, the 304 is for cylinder number 4 any of these could be wrong If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors. Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open

first PO171 o2 bank 1 s1 lean PO174 o2 bank2 lean
PO401 cyl 1 misfire
when an engine misfires the oxygen sensor will read the oxygen from that cyl sensor doesnt read fuel so every misfire is a air pump to diagnose we have to fix misfire first check the coil wires and plugs for cyl 1 use spray bottle with water run engine hot at idle spray wires with water if enging runs rough shakes or stalls then replace the wires dont spray with to much water if the wires are real bad you may not be able to restart engine

try this first once fix misfire clear codes and drive it

plz comment vote reply if you need more help

P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

codes 03-40 are misfires on cylinders 3 & 4 and 325 is ur knock sensor if u had bad gas/water in tank or need tune up and those 2 cylinders misfired could set off code for knock sensor or visa versa as to abs light sheck sensor wires for connection and or damage none observed have rescanned and find out if sensor or unit if sensor scan code will tell u which one ur directional usually blinks faster on the side with the bulb out

Sounds like you have a vacuum leak for the lean code and the misfires. I don't see a 473 code in my manual, but have a 463. The 463 is for the fuel level sensor open or voltage high.