engine performance

286,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
Avatar
NOMADIC MECHANIC
  • MEMBER
  • 1 POST
from a stop to accelerate engine coughs or hesitates through the intersection
Dec 10, 2022 at 2:10 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Hi,

That can be caused by a few things. I need to get a bit more information. First, is that the original mileage on the engine? Second, does the engine smooth out after it gets going? Are there any odd odors or smoke from the exhaust?

The first thing to do is check to see if there are diagnostic trouble codes. This vehicle has an OBD1 system that doesn't require a scan tool to retrieve the codes. All you will need is a short jumper wire or even a paper clip. Follow the directions in this link and let me know the results:

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

If there are no codes, I would check would be the fuel pressure and regulator. If you haven't already, here is a link that explains how it's done:

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

We could have too much or little fuel pressure.

Try these to get started and let me know the results. Also, let me know as much as you can that may help me diagnose the issue.

Take care,

joe

Dec 13, 2022 at 12:36 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle