Voltage issue and fuel gauge not working

GRIMLIN13

MEMBER
1993 CHEVROLET S-10
4.3L
6 CYL
2WD
AUTOMATIC
179,000 MILES

My alternator went out so I replaced it and now my fuel gauge isn't working. My vehicle will not hardly climb a hill do to power loss and it will not take full pedal of fuel with out popping and falling on its face. It will barely run 55 miles an hour I have to let it build up speed and it takes forever to get there and then if I hit a hill it losses all power.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi and thanks for using 2CarPros.

Based on your description, it sounds like the fuel pump is weak and not an electrical issue. Do me a favor. Check it for diagnostic trouble codes. That way we will know if it is an electrical issue or not.

Here is a link that shows how to retrieve codes on an OBD1 system like this:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Also, since you had things apart prior to the problem, recheck you work. Make sure nothing was left disconnected such as vacuum hoses, sensors.

Let me know if you find a code. Also, consider checking fuel pressure and for vacuum leaks. Here are a couple links that you may find helpful:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Joe