Car surging at times and other times lacks power all while driving

DTHOMAS75

MEMBER
2004 CHEVROLET TRAILBLAZER
6 CYL
4WD
AUTOMATIC
244,000 MILES

Car sometimes feel to surge and other times seems to slow down. Running terrible it seems.

Friday, September 10th, 2021 AT 12:19 PM

5 Replies

SQM

MECHANIC
6,383 POSTS

Hello,

A vehicle can have surging issues due to spark, fuel or vacuum issues.

Have a look at this article it covers the basics of the surging issues, should be able to provide you with some insights.

https://www.2carpros.com/articles/engine-surges

Also is your check engine light illuminated? If the issue is due to a sensor or other components it can trigger the engine light. If so have the vehicle scanned for codes.
You can get this done at any of your local auto parts store. Just take your vehicle there and they will scan and give you the codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let me know of any questions.
Thank you.

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Friday, September 10th, 2021 AT 2:28 PM

DTHOMAS75

MEMBER
3 POSTS

No check engine lights. Now today it started pitter puttering. A month ago we replaced the transmission solenoid when it was doing that and it took car if the puttering until today. So far in last 3 months we have replaced alternator, radiator cap, thermostat, water pump, fan clutch, the transmission solenoid along with the transmission filter, air filter and if course oil change. Just received parts to fix both front bushings as well. I'm to the point of driving it off a bridge.

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Tuesday, September 14th, 2021 AT 1:54 PM

SQM

MECHANIC
6,383 POSTS

So when you say its pitter puttering, what does is actually do? Hesitation on acceleration? Low power?

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Tuesday, September 14th, 2021 AT 6:26 PM

DTHOMAS75

MEMBER
3 POSTS

Like transmission slipping or when you have bad gas. Small jerking when going 40 or over.

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Tuesday, September 14th, 2021 AT 6:45 PM

SQM

MECHANIC
6,383 POSTS

Sounds like it might be shuddering going in to the high gear. Which is typical of transmission shuddering. Usually the transmission will shudder when there is not enough fluid pressure inside the transmission, which can be due to low or dirty fluid or a failed component like the solenoid.