Mechanical- Cylinder #5 quit firing

10

Asked by Jul 13, 2016 at 11:03 PM about the 1999 Ford Ranger XLT Extended Cab SB

Question type: Maintenance & Repair

Loss power in very hot weather, stopped at Autozone for PC diagnostics.
"An ASE certified Master Technician has seen this problem on your type of vehicle before and has performed the following repair to fix the problem:
Replace Ignition Coil (s), Spark plug (s) and Spark Plug wire (s).

The mechanic back home is telling me I may have had a problem with fuel injection, but the diagnostics at AutoZone said nothing about fuel injections possible failure.
Is this possible? Wouldn't the AutoZone Diagnostics test have said something about fuel injection?

Primary DTC  P0305  Diagnostic Trouble Codes (DTC)
Overview - Cylinder Number 5 Misfire detected
Definition - Code P0305 indicates that cylinder 5 had too many misfires within a predetermined period of time.

4 Answers

35,355

Both technically can be right. The mechanic may be speaking from experience, the Autozone's computer is just regurgitating probabilities. Do a little visual inspection yourself - make sure the plug wire didn't touch the manifold and get burned, reseat all the plug wires, etc. It would be a shame to spend all that money on a set of plug wires and coil when it a loose wire.

3 people found this helpful.
74,155

Kenf,is right,start with the obvious,then if that dont fix the issue,pull the number five wire off,and crank car,check for fire at that plug,if you have fire,there will be only two issues that would cause this,the fuel injector on five,or you have a bad valve.

2 people found this helpful.
10

Thank you both for that advice. I'll look into it first thing in the morning. Due at the shop at 8.

1 people found this helpful.
64,355

Never ever ever buy parts based on a diagnosis from an auto parts store. Many times they are correct, but many times they are not. I would look at the spark plug and wire first, maybe even move them to another cylinder to see if the miss moves. If that yields no information you could swap the injector with one on another cylinder to see if the miss moves. How many miles are on the plugs and wires?

1 people found this helpful.

Your Answer

Ranger

Looking for a Used Ranger in your area?

CarGurus has 4,584 nationwide Ranger listings starting at $1,195.

ZIP:

Ford Ranger Experts

  • #1
    tennisshoes
    Reputation
    1,600
  • #2
    F_O_R
    Reputation
    1,060
  • #3
    Bob Beaman
    Reputation
    1,030
View All

Related Models For Sale

Used Ford F-150
2,315 Great Deals out of 214,995 listings starting at $1,300
Used Toyota Tacoma
408 Great Deals out of 44,674 listings starting at $1,995
Used Nissan Frontier
294 Great Deals out of 24,425 listings starting at $1,550
Used Chevrolet Silverado 1500
1,783 Great Deals out of 149,328 listings starting at $444
Used Chevrolet S-10
8 Great Deals out of 939 listings starting at $950
Used Dodge Dakota
70 Great Deals out of 3,035 listings starting at $1,595
Used Dodge Ram 1500
306 Great Deals out of 9,515 listings starting at $1,750
Used Jeep Wrangler
254 Great Deals out of 18,605 listings starting at $1,950
Used Toyota Tundra
470 Great Deals out of 38,668 listings starting at $1,999
Used Ford Mustang
253 Great Deals out of 36,696 listings starting at $2,500
Used GMC Sierra 1500
708 Great Deals out of 58,809 listings starting at $1,995
Used Ford F-250 Super Duty
365 Great Deals out of 41,824 listings starting at $1,600

Used Cars For Sale

2011 Ford Ranger For Sale
31 Great Deals out of 682 listings starting at $3,488
2010 Ford Ranger For Sale
15 Great Deals out of 375 listings starting at $4,450
2009 Ford Ranger For Sale
4 Great Deals out of 255 listings starting at $3,950
2008 Ford Ranger For Sale
17 Great Deals out of 355 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.