Surges or hesitates before accelerating?

PENNY C MATURA

MEMBER
1995 CHEVROLET 1500
5.7L
V8
2WD
AUTOMATIC
162,000 MILES

Recently my truck started running ragged, so I changed plus, wires, distributor, fuel filter, air filter, and gave it a gas treatment thinking maybe I had gotten bad gas. Does not do the surging or hesitation all the time before finally picking up speed. Thinking it may be TPS? Any advice would be greatly appreciated, you guys have always come through before. Already priced the TPS and new fuel pump but want to get input before shelling out money for no reason. Thanks!

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,896 POSTS

Hi,

Have you done a few preliminary checks? For example, have you checked for engine vacuum leaks or have you checked fuel pressure?

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

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

Let me know. Also, are there any odd sounds from the exhaust which could indicate a plugged converter and have you pulled diagnostic trouble codes?

https://youtu.be/b2IJGfImVvw

If you haven't checked for codes, do that. Most parts stores will do it free of charge.

Let me know.

Joe

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Saturday, January 16th, 2021 AT 4:09 PM

PENNY C MATURA

MEMBER
5 POSTS

Hi Joe, thanks for reply and yes he is taking it to get diag. Codes today and will do the fuel pressure test and check vacuum as well and I'll update you once that is done. It's an older Chevrolet truck getting up there in miles.

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Monday, January 18th, 2021 AT 5:58 AM

JACOBANDNICKOLAS