98 350 vortec 5.0 liter

Asked by Oct 29, 2017 at 01:03 AM about the Chevrolet Silverado 1500

Question type: Maintenance & Repair

I get in and start my truck that runs just fine,i put it
in reverse and as im backing up all the sudden it
starts running like its only hitten on 4 cylinders.
Sometimes its a constant backfireing and
sometimes it doesnt backfire at all. Loss of power,
hard to start. Yet i can still drive it down the hwy @
75 mph. Its been parked now for a cpl weeks with
me only having moments after work to mess with
it. Ive always had a problem with it starting,only
occasionally tho it would start but instantly die i
could either put a rag soaked in gas where the air
filter is or i could wait 10 min and it would start just
fine.

1 Answer

10,755

see if the injectors are firing normally unless you have the TBI unit on top the motor then just see if those injectors are working ,, , test or replace ignition module , and if you can purge the fuel rail at the valve see what the gas looks like , check plugs , wires ,coils , I used to think parts (alt. fuel pumps ) ,would just quit but thats not always the case ,intermediate problems are the worst because the problem has to be tested when it occurs otherwise it'll test normal , a gas soaked rag is asking for problems get a soda bottle with a pin hole in the cap and squirt some gas in the throttle if you have to ,

Your Answer:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    4,560
  • #2
    Andrew Olsen
    Reputation
    3,820
  • #3
    Rowefast
    Reputation
    3,790
View All

Related Models For Sale

Used GMC Sierra 1500
61 Great Deals out of 9,455 listings starting at $4,595
Used Ford F-150
141 Great Deals out of 10,248 listings starting at $2,000
Used Chevrolet Silverado 2500HD
12 Great Deals out of 1,645 listings starting at $5,950
Used Ram 1500
193 Great Deals out of 27,365 listings starting at $5,388
Used Dodge Ram 1500
11 Great Deals out of 397 listings starting at $4,900
Used Toyota Tundra
19 Great Deals out of 1,628 listings starting at $2,318
Used Toyota Tacoma
24 Great Deals out of 1,814 listings starting at $5,999
Used Chevrolet Colorado
25 Great Deals out of 3,211 listings starting at $2,485
Used Chevrolet Tahoe
11 Great Deals out of 1,307 listings starting at $3,690
Used Chevrolet Camaro
8 Great Deals out of 1,046 listings starting at $10,995
Used Ford F-250 Super Duty
9 Great Deals out of 777 listings starting at $5,995
Used GMC Sierra 2500HD
10 Great Deals out of 1,718 listings starting at $3,900
Used Ford Mustang
27 Great Deals out of 1,775 listings starting at $4,800
Used Dodge Charger
32 Great Deals out of 947 listings starting at $4,995
Used Chevrolet Silverado 1500HD
3 listings starting at $8,928

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.