persistant p0300 code HELP please

5

Asked by Jul 14, 2011 at 05:07 PM about the 2001 Chevrolet Suburban LT 1500 4WD

Question type: Maintenance & Repair

just purchased this 2001 suburban.  get up to around 70 mph and ses starts flashing.  Plugged into scanner and cylinders 1,5,6,8 have multiple missfires.  fuel pump leaking down so replaced it as well as plugs, wires.  Checked injector and they have between 11-14 U resistance.  No feeling of misfire at all..truck runs strong with NO perceptable missing at all.  Bad ECU???  checked all grounds also.
Thanks in advance for any help.  its driving me CRAZY!!!!

2 Answers

Having the same problems. 01 Suburban 129,000 miles . Replaced the pump also , same reason . No help . Back to the dealership tommorow for additional tests . Will keep you posted .

1,975

check distributer cap etc.

Your Answer

Chevrolet Suburban Experts

  • #1
    Andrew Olsen
    Reputation
    1,060
  • #2
    Neal Turner
    Reputation
    980
  • #3
    Eric Fritz
    Reputation
    940
View All

Related Models For Sale

Used GMC Yukon XL
271 Great Deals out of 14,432 listings starting at $1,950
Used Chevrolet Tahoe
809 Great Deals out of 42,074 listings starting at $1,987
Used GMC Yukon
611 Great Deals out of 20,728 listings starting at $2,500
Used Ford Expedition
385 Great Deals out of 17,302 listings starting at $1,500
Used Cadillac Escalade
289 Great Deals out of 11,900 listings starting at $1,200
Used Chevrolet Silverado 1500
2,703 Great Deals out of 174,507 listings starting at $955
Used Chevrolet Silverado 2500HD
384 Great Deals out of 30,661 listings starting at $2,995
Used Ford F-150
3,332 Great Deals out of 221,764 listings starting at $1,200
Used Toyota Sequoia
127 Great Deals out of 5,152 listings starting at $1,500
Used GMC Sierra 1500
1,198 Great Deals out of 64,603 listings starting at $999
Used Lincoln Navigator
81 Great Deals out of 3,755 listings starting at $1,795
Used Ford Explorer
1,242 Great Deals out of 69,554 listings starting at $1,000
Used Ford Excursion
11 Great Deals out of 830 listings starting at $2,995

Used Cars For Sale

2017 Chevrolet Suburban LT 1500 4WD For Sale
36 Great Deals out of 2,087 listings starting at $39,000
2016 Chevrolet Suburban LT 1500 4WD For Sale
29 Great Deals out of 505 listings starting at $30,500
2015 Chevrolet Suburban LT 1500 4WD For Sale
17 Great Deals out of 450 listings starting at $23,500
2014 Chevrolet Suburban LT 1500 4WD For Sale
10 Great Deals out of 195 listings starting at $15,008
2013 Chevrolet Suburban LT 1500 4WD For Sale
8 Great Deals out of 202 listings starting at $10,988

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.