jQuery not supported.



Stumble, Hesitation, Bucking, Hard to start, Stalling,

Stumble, Hesitation, Bucking, Hard to start, Stalling, backfire, jerking

Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby gscream [OP] » Jan 04 2012, 5:45am

My truck:
1989 Chevy K1500
5.7L 350 4x4 V8

I'm new to this forum so forgive me if I break any rules. My truck randomly stalled on me about a week ago. Very shocking because it's never done that. A few days later it began to stumble and hesitate upon acceleration. During idle it would sound as if it were about to shut off but it wouldn't. Rough idle and hesitation sounded like a vacuum problem, so I checked the TBI. The EGR valve was faulty so I replaced it. That fixed the rough idle and it drove fine for a day or two. But then yesterday and today, my truck began to buck pretty hard. I was driving down the interstate and it started stumbling, bucking and I heard a misfire or backfire. It's was very cold here in Georgia but I don't think that has anything to do with the trucks behavior. It was also hard to start for the first time in 3 years. I had to pump the gas pedal to get it to start. Over the past years this is what's been serviced: remanufactured engine, rebuilt transmission, egr valve, drive shaft, battery, brakes, tires, water pump, catalytic converter, muffler, fuel filter, and thermostat. I pulled codes off and this is what I got 32, 42, 43, and 44. It bucked and jerked around for about 30mins. I parked it for about 40 mins and then it drove fine. Here is what I think the problem maybe:

1. EGR Solenoid
2. Fuel Injectors
3. TPS
4. Fuel Pump

I don't know what else it could be. Any ideas?

PS: This truck is my baby!!
Attachments
Photo0532.jpg
Original Poster
gscream
Newbie
Newbie
Posts: 8
Topics: 1
Blogs: 0
Joined: Jan 04 2012, 5:16am
Years of membership: 2 years of membership2 years of membership
Location: Georgia
Year: 1989
Make/Model: Chevrolet Silverado
Extra Info: 5.7L 350
Group Membership:
Registered users
Related Topics  4.8 hard start, rough idle, hard shifting   Hard start but never first of the day   Warm hard start   08 silverado hard start   hard start problem   Hard start issue   HELP.... Hard to start when hot   hard to start after fuel up   Hard start when truck gets warm   5.3L Hard Start at High Altitude when Warm   2003 Sierra 1500 hard to start   Hard Start Fuel Pressure question   Intermittant Low Idle/Hard Start. No CEL, Misfire on scanner   88 Silverado 350 TBI A/T Hard start Rough Idle stalls in gea 
Engine Sponsor
Advertise Here

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby sparkjumper » Jan 04 2012, 5:54am

Could you have gotten some bad gas (water)?
User avatar
sparkjumper
Combustion on 3 pistons [L2]
Combustion on 3 pistons [L2]
Posts: 392
Topics: 3
Images: 11
Blogs: 0
Joined: Oct 12 2011, 2:29am
Years of membership: 2 years of membership2 years of membership
Location: Central Pennsylvania
Year: 2011
Make/Model: Chevrolet Silverado
Extra Info: All Star 4X4 Z71
Group Membership:
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby puppeteer » Jan 04 2012, 6:11am

Spark could be right but if it is jumping and having that much trouble then you have more than bad gas. Good places to check would be fuel filter very cheap fix. supposed to be changed every 5k but no one does. Also might be cap and rotter. I had a old truck that did that until it stalled out and that is what it happened to be. I may be wrong but i dont think the 89 has fuel injectors?
puppeteer
Combustion on 2 pistons [L2]
Combustion on 2 pistons [L2]
Posts: 282
Topics: 8
Images: 19
Blogs: 13
Joined: Dec 10 2011, 5:42am
Years of membership: 2 years of membership2 years of membership
Location: Wisconsin
Year: 2005
Make/Model: GMC Sierra
Extra Info: 2500 HD 6.6 Dmax
Group Membership:
Registered users
Servicemen

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby ASTE25 » Jan 04 2012, 7:42am

It sounds like a spark problem, although, those engines are notorious for the intake manifold gaskets leaking. Check the fuel pressure and flow rate as well to see if it is within specs.
Jordan
2013 Blue Granite Metalic Silverado 2500HD Z71 4X4 extended cab regular bed
6.6L Duramax/Allison 6 speed
Line-X premium over the rail (black)
User avatar
ASTE25
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 10916
Topics: 19
Images: 21
Blogs: 0
Joined: Jan 03 2011, 6:37am
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: New Market, Alabama
Year: 2013
Make/Model: Chevrolet Silverado
Extra Info: 2500HD Z-71
Group Membership:
Automotive Technicians
Member Extraordinaire
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby gscream [OP] » Jan 04 2012, 11:53am

I'm sure its not the spark plugs. Had those changed by a professional shop in February when I changed the engine. I also changed out the fuel filter the day it stalled. The 89 has 2 fuel injectors. It's a TBI. Bad gas? Ive been getting gas from the same place for a year. I doubt it.
Original Poster
gscream
Newbie
Newbie
Posts: 8
Topics: 1
Blogs: 0
Joined: Jan 04 2012, 5:16am
Years of membership: 2 years of membership2 years of membership
Location: Georgia
Year: 1989
Make/Model: Chevrolet Silverado
Extra Info: 5.7L 350
Group Membership:
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby gscream [OP] » Jan 04 2012, 12:26pm

Also, I just went out and started the truck up. It's about 23 degrees outside. It started with no problems. It appears to b idling fine. What do I do if it is bad gas?
Original Poster
gscream
Newbie
Newbie
Posts: 8
Topics: 1
Blogs: 0
Joined: Jan 04 2012, 5:16am
Years of membership: 2 years of membership2 years of membership
Location: Georgia
Year: 1989
Make/Model: Chevrolet Silverado
Extra Info: 5.7L 350
Group Membership:
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby gscream [OP] » Jan 04 2012, 1:50pm

Okay, after about 45mins of driving, this is what was going on. the engine drove fine. the problem this time was with the transmission! It would not kick back down or downshift properly. It would just cause the engine to rev and rev. But after about 10mins of that, it went away. The truck drove fine....except when I was going on a steep steep steep hill. It did sputter and buck just a little bit. I'm now wondering if there is anything that controls the timing between the engine and the transmission? What component can go bad and cause the engine to stumble and the automatic transmission to not downshift?
Original Poster
gscream
Newbie
Newbie
Posts: 8
Topics: 1
Blogs: 0
Joined: Jan 04 2012, 5:16am
Years of membership: 2 years of membership2 years of membership
Location: Georgia
Year: 1989
Make/Model: Chevrolet Silverado
Extra Info: 5.7L 350
Group Membership:
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby puppeteer » Jan 04 2012, 7:09pm

Clutch packing's could be warn to bad, or maybe torque converter which is essentially a pump on the shaft of the engine that uses fluid pressure to turn the transmission instead of a clutch like on a standard type trans. Recently i had a friend who was having some problems kind of like that and it turned out to be a loose wire harness to be best case scenario.
puppeteer
Combustion on 2 pistons [L2]
Combustion on 2 pistons [L2]
Posts: 282
Topics: 8
Images: 19
Blogs: 13
Joined: Dec 10 2011, 5:42am
Years of membership: 2 years of membership2 years of membership
Location: Wisconsin
Year: 2005
Make/Model: GMC Sierra
Extra Info: 2500 HD 6.6 Dmax
Group Membership:
Registered users
Servicemen

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby ASTE25 » Jan 04 2012, 8:32pm

The lockup converter could not be unlocking, which would act like a manual transmission if you were slowing and not down shifting or not pushiong the clutch in. It may have a bad tcc solenoid.
Jordan
2013 Blue Granite Metalic Silverado 2500HD Z71 4X4 extended cab regular bed
6.6L Duramax/Allison 6 speed
Line-X premium over the rail (black)
User avatar
ASTE25
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 10916
Topics: 19
Images: 21
Blogs: 0
Joined: Jan 03 2011, 6:37am
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: New Market, Alabama
Year: 2013
Make/Model: Chevrolet Silverado
Extra Info: 2500HD Z-71
Group Membership:
Automotive Technicians
Member Extraordinaire
Registered users

Re: Stumble, Hesitation, Bucking, Hard to start, Stalling,

Postby gscream [OP] » Jan 04 2012, 11:09pm

Drove it again for about 30mins. Engine was fine. Just stumble during uphill acceleration. However, the transmission was still sooooooo bad. It wouldn't go past 20mph. I'm going to take my Chevy to Mr. Transmission tomorrow afternoon.
Original Poster
gscream
Newbie
Newbie
Posts: 8
Topics: 1
Blogs: 0
Joined: Jan 04 2012, 5:16am
Years of membership: 2 years of membership2 years of membership
Location: Georgia
Year: 1989
Make/Model: Chevrolet Silverado
Extra Info: 5.7L 350
Group Membership:
Registered users
Next

Return to Engine

 

  • Similar topics
    Replies
    Views
    Last post

Common search terms

engine problem think stumble check stalling fuel bucking hesitation hard start done pretty today getting still tires back same right first trucks

It is currently Sep 02 2014, 5:47pm

  • Sponsor
Login  •  Register
SHOP TALK (Live Chat)
Engine Forum
EngineThis is where all of our engine discussion and conversation takes place. Talk about engine diagnostics, adjustments, modifications, performance and care. Motor tuning and repair to gain horsepower and fuel efficiency.
To create a new topic in Engine, click this button:
Previous topic Next topic
Sitewide News Sitemaps & Feeds

Who is online

Users browsing this forum: No registered users and 5 guests