put new plugs in after aprox 100 miles plugs on the left are burnt fried caked black and the plugs on right are brand new..how can this be?

Asked by Aug 10, 2015 at 11:45 PM about the 1993 Ford Ranger

Question type: Maintenance & Repair

what could cause this?  truck runs good but wont start after it warms up until the motor
cools then fires right up..at stops  idle speeds up

4 Answers

119,735

You may be burning lean, did you change the coil packs, is your timing correct?

6,205

Sounds like left bank could be running lean. Maybe a vacuum leak, gasket, etc. You might want to bite the bullet and put in platinum plugs. They pay for themselves in time.

230

Why did you replace the plugs to begin with, were they too burnt? Need more info to diagnose this. A vacuum check would be advised although I doubt that is it. Also do not wait 100 mi., put in a new set of plugs do a power run then pull and read them immediately. Have you checked for codes?

6,205

I might have read your heading wrong... are the left bank plugs black and wet? what do you mean by caked? That would indicate oil and the right bank is burning properly.

Your Answer

Ranger

Looking for a Used Ranger in your area?

CarGurus has 4,571 nationwide Ranger listings starting at $1,895.

ZIP:

Ford Ranger Experts

  • #1
    tennisshoes
    Reputation
    1,590
  • #2
    F_O_R
    Reputation
    1,060
  • #3
    Bob Beaman
    Reputation
    1,020
View All

Related Models For Sale

Used Ford F-150
2,299 Great Deals out of 215,952 listings starting at $1,300
Used Chevrolet S-10
12 Great Deals out of 949 listings starting at $950
Used Dodge Dakota
64 Great Deals out of 3,050 listings starting at $1,595
Used Dodge Ram 1500
305 Great Deals out of 9,549 listings starting at $1,750
Used Jeep Wrangler
249 Great Deals out of 18,799 listings starting at $2,695
Used Ford Mustang
256 Great Deals out of 36,844 listings starting at $2,500
Used GMC Sierra 1500
701 Great Deals out of 58,667 listings starting at $1,995

Used Cars For Sale

2011 Ford Ranger For Sale
22 Great Deals out of 667 listings starting at $3,488
2010 Ford Ranger For Sale
18 Great Deals out of 374 listings starting at $4,500
2009 Ford Ranger For Sale
7 Great Deals out of 248 listings starting at $3,950
2008 Ford Ranger For Sale
15 Great Deals out of 358 listings starting at $2,095

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.