rough idle, loss of power in gear and cruising

Asked by Charles Jun 28, 2015 at 04:57 PM about the 1995 Chevrolet Chevy Van G20 Extended RWD

Question type: Maintenance & Repair

My G20 van with TBI/EGR/TWC/H02S is idling rough as if a vacuum leak but checked all the lines and no leak. When applied a slight acceleration its hesitant and bucks. When driving at cruising speed it looses power and bucks but runs a little better when accelerating in passing gear. There are no codes in the ECM when checked with a code reader. Checked the EGR and seems to be working it opens at approx. 2000 RPM's and when checked for closing a few weeks ago there was no air blowing through when closed! The solenoid vacuum is irregular sometimes it will go up and immediately drop to 0 and  sometimes it will go up and maintain vacuum but sometimes not respond at all with no vacuum. Can you help with this situation?

1 Answer
65,400

firebird338 answered 9 years ago

Check air filter and clean throttle body with throttle body cleaner spray also change fuel filter if have not done done so in a while. Add fuel injector cleaner to gas tank then take out on road and hit the passing gear a few times that will help the injector cleaner to clean the injectors and remove carbon build up.

4 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • rough idle, loss of power in gear and cruising 1 Answer

    My G20 van with TBI/EGR/TWC/H02S is idling rough as if a vacuum leak but checked all the lines and no leak. When applied a slight acceleration its hesitant and bucks. When driving at cruising speed it...

    1995 Chevrolet Chevy Van G20 Extended RWD

    -

    Maintenance & Repair

  • 1995 Chevy G10 Seems like loss of power! 2 Answers

    Seems like loss of power! replaced cat, muffler,air filter, plugs, wires,cap, rotor, temp sensor, tried a new map sensor did the same put old one back on. Was dying on start up till after i replaced...

    1995 Chevrolet Chevy Van G10 RWD

    -

    Maintenance & Repair

  • 84 Chevy Van Rough Start/Idle question 3 Answers

    My van has an after market manual choke and usually fires up after the second try with the choke out all the way. I let it warm up a bit then put the choke in mostly all the way. Sometimes, when I put...

    1984 Chevrolet Chevy Van

    -

    Maintenance & Repair

  • dangerous shaking of front end 2 Answers

    I have a 2009 Express cube van that shakes so bad at time that a cup of coffee jumps out of the cup holder. It has had new brakes and pads ( three times), new front end, new shocks. Nothing seems to...

    Chevrolet Chevy Van

    -

    Maintenance & Repair

  • 1987 g20 chevy van aint getting no power to the injectors 2 Answers

    aint getting no power to the injectors

    Chevrolet Chevy Van

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Chevy Van Questions

CarGurus Experts

  • #1
    John Saffrahn
    Reputation
    510
  • #2
    Gene Arnett
    Reputation
    430
  • #3
    Paul
    Reputation
    350
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Express
30 listings starting at $12,990
Used Chevrolet Astro Cargo
1 listing
Used Dodge RAM Van
2 listings
Used GMC Savana
23 listings starting at $19,900
Used GMC Savana Cargo
18 Great Deals out of 442 listings starting at $5,800
Used Ford E-Series
5 Great Deals out of 129 listings starting at $2,795
Used Chevrolet Astro
4 listings
Used Ford Transit Cargo
28 Great Deals out of 1,009 listings starting at $10,999
Used GMC Vandura
2 listings
Used Chevrolet Corvette
22 Great Deals out of 1,004 listings starting at $19,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.