96 chevy 1500 5.7 vortec starts fine,after a few minutes idle drops and runs rough


Asked by Aug 10, 2016 at 10:42 PM about the 1996 Chevrolet C/K 1500 Silverado Extended Cab SB

Question type: Maintenance & Repair

Hi,this is my first post on here.i have been
trying to fix my 110k mike silverado.it had sit
up over 6 years when I got it with problems,i
started replacing parts,delphi spider
injection kit,new gas tank and pump,fuel
filter,flushed all fuel lines,new distributor cap
and rotor with distributor gasket,ac delco
plugs and new wires,i removed egr valve and
cleaned sticking pintle...got everything done
and truck started right up and sounded
good,but after a few minutes idle dropped
real low and started running rough,which will
get even worse if you turn power steering all
the way.only code I get is p0307.read a little
about random misfire codes and came to
another conclusion it was iac valve,swapped
it with same results.I did a fuel pressure test
today and I read 55psi with key on,50.5
when it starts and when it starts to idle
erratically again,the pressure was 56-58.my
money tree has wilted some and hoping
someone who has seen this issue before
can help me,thanks

No answers yet

Your Answer

Add photo

Related Questions

  • 96 Chevy C1500 5.7L Vortec Truck won't start, Replaced Fuel Pump, Filter & Has Spark. 78 answers

    Hey everyone, I have a 1996 Chevy C1500 with a 5.7L Vortec, I got the truck recently and was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, also the pump turns on and there...

    Chevrolet C/K 1500


    Maintenance & Repair

  • 5.7 chevy 1500 loses power 3 answers

    When i get on a hill and down shift the Engine loses power. this truck had o2 sensor code with a vacccum leak that was repaired. Fuel psi is 35. Could an o2senzor do this

    1996 Chevrolet C/K 1500 Cheyenne Extended Cab SB


    Maintenance & Repair

  • Idleing rough 2 answers

    I have 1999 chevy silverado with 5.7. Motor runs smooth until you come to a stop. The idle drops to barely running and is rough. Take off and runs well. Why is it running rough at a stop

    1999 Chevrolet C/K 1500 LS 4WD


    Maintenance & Repair

  • 1994 Chevy C1500 5.7 bogs/backfires when I give it gas. 34 answers

    My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl thr...

    1994 Chevrolet C/K 1500 Silverado Standard Cab Stepside SB 4WD


    Maintenance & Repair

  • My Chevy Lumina will not start hot, runs/idles rough 105 answers

    I have a 1996 Chevy Lumina LS, 3.1 V6. Over the last 18 months I have had problems with it getting hot (not engine coolant) and not starting after driving for a while or running a few errands of 10-20...

    1996 Chevrolet Lumina 4 Dr LS Sedan


    Maintenance & Repair

Search Chevrolet C/K 1500 Questions

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,610
#2 John Saffrahn
John Saffrahn
Reputation 2,260
#3 Rowefast
Reputation 1,190
View All

Related Models For Sale

Used GMC Sierra 1500"
1,029 Great Deals out of 56,923 listings starting at $2,300
Used Ford F-150"
3,271 Great Deals out of 216,650 listings starting at $1,500
Used Chevrolet C/K 2500"
287 listings starting at $1,995
Used Dodge Ram 1500"
520 Great Deals out of 13,739 listings starting at $995
Used Toyota Tacoma"
626 Great Deals out of 30,504 listings starting at $2,850
Used Chevrolet S-10"
13 Great Deals out of 1,811 listings starting at $1,749
Used Chevrolet Tahoe"
1,076 Great Deals out of 36,075 listings starting at $1,700
Used Chevrolet C/K 3500"
299 listings starting at $5,995
Used Chevrolet Camaro"
799 Great Deals out of 38,852 listings starting at $2,650