2 problems.1997 Chevy blazer, OBD2 and fuel gauge wont read

number 9
https://fuse-box.info/dodge/dodge-ram-1500-2500-3500-1994-2001-fuses-and-relays
https://www.youtube.com/watch?v=uzAA9-XL2nU

It sounds like you have a combo of problems. the PCM & an emissions problem (fuel) Was that PCM new when you installed it? if so, unplug it & plug it back in ( check the connector) Start w/ the comm problem so you can read it & look into the fuel pump. Poss seal on tank? Vacuum leak?

probly a vacuum leak-will set lite cause car runnin lean--listen for noises or chec hoses and gasket quality--problem wiil go away w increase speed--some leaks are hidden like egr valve condition-but it isnt stalling--------may want to try a scan w factory specific equip since car is old--cheap littl code readers wont cut it--dont go to a dealer-softwear dont go back that far

Since this engine is fully electronically controlled the first thing that must be done is to read the fault codes of the engine control computer and check the fuel pressure from the electric pump. You will need an OBD2 system code reader and a fuel pressure test gauge.

The OBDII / OBD2 connector is 18" from the center of the center console.







You will need to purchase an OBDII scanner/reader to read these codes.

The alternative method is get a OBD2 cable and a laptop + software to pull the codes.

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An inexpensive OBD2/CAN bus reader around $75-$120 is a good start.
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Did the inspector mention anything about drive cycle or lack of stored readyness fields?

Please email on why it fail. You can append more info by click the button on TOP RIGHT of this page.

chevy and gmc trucks have an on going problem with this,turn the key on,and get a rubber mallot or a hammer and hit the bottom of the fuel tank a couple of times,this will unstick something in the fuel pump/sending unit.

Advanced Auto Parts and Autozone will check your OBDII for free (On Board Diagnostic System). They will give you a print out of what the code(s) are and possible solutions.
As for the gas gauge, you might check the sending unit from fuel tank and possibly the float in the tank. This requires dropping the tank, you may not be set up to do this work, so find a qualified shop in your area.

The code scanner that you need is called ODBII code reader with ABS, and it works in the same way as the one that you connect to the car computer module (ECU) to read codes when the check engine light comes on, but the cheap ones that you can buy from $50 do not have the ABS brake scan function.

If the problem is the ABS, then it is often a wiring to abs problem, or a defective ABS control module, a scan reading is necessary to know what the problem is.

Below few examples of Code reader with ABS:

Equus 3150 Innova ABS + Professional CanOBD2 ...


$199.00 - Amazon.com


Cp9449 Brake Scan Abs Diagnostic Tool Obd2 ...


$219.67 - eBay


Equus 3160 Innova ABS + Professional CanOBD2 ... $259.99 - Amazon.com


CAN OBDII Code Reader with Multilingual Menu $49.99 - Harbor Freight Tools

this is defiantly a CPU issue but, at the least, it could be a fuse box issue as well. check both to be safe.. oh, some stereos that are purchased and installed incorrectly can cause this as well.

if your obd2 scanner fits the connection you have obd2, obd1 connector is way differnt.

your code p1443
Control System
Canister Purge
Valve (Mechanical)
Malfunction
Monitors the fuel vapor
flow between the
engine intake manifold
and the EVAP
canister. The system
failure occurs when a
leak or blockage
between the intake
manifold, the EVAP
canister purge valve
and the EVAP canister
is detected by the
PCM.
l Pinched, blocked or
plugged fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
canister
l Disconnected, cracked
or cut fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
canister purge valve
Check for audible vacuum
noise in the engine
compartment or significant
fuel odor in the engine
compartment or near the
EVAP canister.

This link has all the codes you need.
http://rockledge.home.comcast.net/~rockledge/RangerPictureGallery/DTCs.pdf