5.7 runs bad when warm sometimes
10

Asked by GuruCJ5L Oct 17, 2017 at 12:41 PM about the 1997 Chevrolet C/K 1500 Silverado Extended Cab 4WD

Question type: Maintenance & Repair

I have a 97 K 1500 with intermittent running problems when
warm it doesn't always do it had just started it recently
after changing the rear end which shouldn't have anything
to do with it I noticed it mainly when using cruise control  
cuz it's at very low RPM just like cruising down the highway
it feels like somebody turn the ignition off and then on
again just intermittently and it never does it cold thing runs
great other than that you can step on it takes right off no
problem but it doesn't always do it either I can drive it all
day long if I don't shut the truck off it never gives me any
issue some days It fired up you go 3 miles and it starts
acting up anybody have any ideas on this the only codes it's
throwing is mass air flow and also 02 I change the throttle
positioning sensor because it felt like it was at the same
throttle position every time and it's at low RPM 14 1500
RPM

11 Answers
59,725

enginecreator answered 7 years ago

Well the thing about its like it shut off and come back on, sounds like a ground issue but the MAF and o2 may be connected to this or another all together issue but they are likely connected to each other.

Mark helpful
59,725

enginecreator answered 7 years ago

O.k. Maf & cam sensor, those 2 are also on the same fuse on a lot of gm trucks. Look at your fuse Panel under dash & may be under hood, I think under dash has Eng. 1 Fuse should be 20 amp. See if it or any others are bad. If not then will have to look farther.

Mark helpful
59,725

enginecreator answered 7 years ago

If that eng. 1 fuse is blown and it blows the new fuse then need to search all those circuits on that fuse for shorts, one post I found that has these codes and blowing the eng1 fuse a downstream O2 had internal short which was found by using a multi-meter to check with.

1 people found this helpful.
Mark helpful
10

GuruCJ5L answered 7 years ago

Thanks you were right it was a blown fuse truck runs great again can't believe I quit driving it because of something so simple thanks again

Mark helpful
59,725

enginecreator answered 7 years ago

Good deal, Something may have shorted to burn the fuse, but the circuits on any fuse can be figured out & tested.

Mark helpful
10

GuruCJ5L answered 7 years ago

I thought about that so I figured I'll drive it for awhile and if it blows again I will dig into it deeper to find the short checked the wiring as far as I could without getting into the harness too much everything look good so I figure I'll just run it for a while if it start screwing up all know where to look that fuse and if so I'll pull the O2 sensor and check it out but until then I think I'm just going to leave it alone the weather where I live right now is pretty nasty it's not like I really want to get underneath of it unless I have to thanks again I appreciate your help

Mark helpful

Your Answer:

Related Questions

  • 5.7 runs bad when warm sometimes 11 Answers

    I have a 97 K 1500 with intermittent running problems when warm it doesn't always do it had just started it recently after changing the rear end which shouldn't have anything to do with it I notice...

    1997 Chevrolet C/K 1500 Silverado Extended Cab 4WD

    -

    Maintenance & Repair

  • 1988 chevy truck 5.7 starts and runs a while then dies and sometimes will start up and sometimes it wont stgart right back up 9 Answers

    I have a 1988 Chevy truck 5.7 just recently it just shut off while I was driving it. it would start right back up and idle a few seconds and die again and this would go on for awhile. then sometimes i...

    1988 Chevrolet C/K 1500

    -

    Maintenance & Repair

  • Hard start when warm 3 Answers

    I have a 98 Chevy c1500 with 289,000 miles, and I've been having a problem with it starting when its warm, after it sits for about an hour or so, it takes about 2 tries to get it to start and after ...

    1998 Chevrolet C/K 1500 Cheyenne Extended Cab LB RWD

    -

    Maintenance & Repair

  • Tbi 5.7 runs then dies 3 Answers

    So I have a 89 Chevy K 1500 5.7, it runs fine. starts up runs for a little while as soon as it gets hot, it dies I and you can turn around and start it right back up.and if i just started up take ...

    1989 Chevrolet C/K 1500 Cheyenne Extended Cab LB 4WD

    -

    Maintenance & Repair

  • i have a 97 chevy 1500 5.7 vortec and it runs choppy at idle 7 Answers

    i have a 97 chevy 1500 5.7 vortec and it runs choppy at idle and when taking off but pulls out of it at 1500rpms but when it shifts it boughs until 1500rpms again and at highway speed i cant run ove...

    1997 Chevrolet C/K 1500 WT RWD

    -

    Maintenance & Repair

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 4 nationwide C/K 1500 listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Chevrolet C/K 1500 Questions

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    15,920
  • #2
    Rowefast
    Reputation
    9,670
  • #3
    John Saffrahn
    Reputation
    6,470
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
131 Great Deals out of 6,882 listings starting at $3,975
Used Ford F-150
304 Great Deals out of 15,351 listings starting at $1,954
Used Chevrolet Camaro
24 Great Deals out of 344 listings starting at $10,500
Used Toyota Tacoma
53 Great Deals out of 1,012 listings starting at $8,708
Used Chevrolet C/K 2500
1 listing
Used Chevrolet Tahoe
15 Great Deals out of 714 listings starting at $5,995
Used Chevrolet Corvette
22 Great Deals out of 1,004 listings starting at $19,500
Used Chevrolet S-10
2 listings starting at $12,975
Used Dodge RAM 1500
7 Great Deals out of 80 listings starting at $4,000

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.