Engine Skipping rough idle, loss of power


Asked by Aug 05, 2013 at 08:31 PM about the 1996 GMC Sierra 1500 C1500 SLE Extended Cab SB

Question type: General

1996 GMC Z71 this happen all at once engine is misfiring, rough idle, loss of power, will
start right up, check plugs,/replaced wth is going on with it ,also check MAP sensor and
clean it check all plug wires, can someone help me?

11 Answers

the end of your battery cable (the non-clamp side) has a bolted connection to the chassis/frame...regardless of how it LOOKS, undo the bolt, wirebrush the lug and the place that it attaches to to assure a 300 cca connection~...the cable goin' up to the motor too (near the alternator)~

12 out of 12 people think this is helpful.

the battery pulls enough power to "weld" the connection....which it does and a little blue arc appears and some corrosion is left behind...you cannot see this phenomenon, because the requirements of the ignition and fuel pump can tolerate varying amperages and voltages....but the delicate computer controls do not do well with varying amperages and voltages...this is hard to notice until failure~.....why pray..tell do they stick a .75Amp requirement on the same playfield as the 300 amp requirement makes no sense at all~

6 out of 6 people think this is helpful.

get your ground nice and clean and your computer will stop belly-achin'~

3 out of 3 people think this is helpful.

after you do what mark said to do and you still have a problem,go to your auto parts store and get a bottle of CHEVRON FUEL INJECTION AND FUEL SYSTEM CLEANER.It comes in a black bottle,read instructions then add to your fuel tank.Ive got a 1996 k-1500 with 5.7 vortec,it started misfiring and did what you said and still had problem.Put CHEVRON FUEL INJECTER CLEANER in at let it idle for 4 to 5 minutes and my misfire was gone.The 5.7 vortec has a very PICKY ATTITUDE one slight inerference with the engine and it will let you know in a BAD way.GOOD LUCK!!!! Thanks mark for your answr ill write that one down!

2 out of 2 people think this is helpful.

sorry my answer had the name MARK in it.It should read judge _roy.sorry!!

1 out of 1 people think this is helpful.

naw...man, it ain't like that...every contribution should be taken into account...there is no such thing as a WRONG answer....just those that will offend~

1 out of 1 people think this is helpful.

Thankyou judge_roy for your comment,its people like you,and I hope that people would say myself,and alot of others,that share there inputs on trying to help our brothers and sisters across the great U.S.OF A.THANKS!!

1 out of 1 people think this is helpful.

awww thanks bigc52....life is precious and we shall not waste ANY of it pushing negative energy...no good could possibly come of it~...nuff lecturin'---- sometimes it takes a major trauma to bring the truth out~

1 out of 1 people think this is helpful.

the actual Hangin Judge was an Evil man....took his name because no one else wanted it~

1 out of 1 people think this is helpful.

So your computer is happy now....every one is happy and the story ends with a happy ending....one might hope~

1 out of 1 people think this is helpful.

Chevron's got techron in there already....so if your motor is picky and gums up easily that'd be the one....the Toyota would run on vodka,,,the MINI must have 93 or runs like crap.~

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 55,958 nationwide Sierra 1500 listings starting at $2,400.


Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
Reputation 4,390
#2 John Saffrahn
John Saffrahn
Reputation 3,070
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,690
View All

Related Models For Sale

Used Ford F-150"
3,170 Great Deals out of 215,803 listings starting at $1,000
Used Dodge Ram 1500"
539 Great Deals out of 13,899 listings starting at $995
Used Toyota Tacoma"
632 Great Deals out of 30,001 listings starting at $2,850
Used Chevrolet Tahoe"
1,040 Great Deals out of 36,534 listings starting at $1,695
Used GMC Yukon"
547 Great Deals out of 14,667 listings starting at $1,500
Used GMC Sierra 2500"
212 listings starting at $4,999
Used Chevrolet Camaro"
813 Great Deals out of 39,041 listings starting at $2,650

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
18,771 listings starting at $20,851
2016 GMC Sierra 1500 For Sale
76 Great Deals out of 13,585 listings starting at $22,305
2015 GMC Sierra 1500 For Sale
191 Great Deals out of 4,747 listings starting at $15,995
2014 GMC Sierra 1500 For Sale
161 Great Deals out of 4,271 listings starting at $14,899
2013 GMC Sierra 1500 For Sale
86 Great Deals out of 2,641 listings starting at $12,400