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

24,785

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 of 3 people found this helpful.
65,645

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 of 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 of 1 people found this helpful.
47,675

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 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Ranger

Looking for a Used Ranger in your area?

CarGurus has 5,676 nationwide Ranger listings starting at $950.

ZIP:

Search Ford Ranger Questions

Ford Ranger Experts

#1 tennisshoes
tennisshoes
Reputation 1,300
#2 Tracy Hooks
Tracy Hooks
Reputation 800
#3 Tom Demyan
Tom Demyan
Reputation 750
View All

Related Models For Sale

Used Ford F-150
2,059 Great Deals out of 207,350 listings starting at $1,499
Used Toyota Tacoma
473 Great Deals out of 41,593 listings starting at $1,995
Used Nissan Frontier
293 Great Deals out of 23,781 listings starting at $1,995
Used Chevrolet S-10
5 Great Deals out of 1,310 listings starting at $2,695
Used Chevrolet Silverado 1500
1,772 Great Deals out of 181,204 listings starting at $250
Used Dodge Dakota
137 Great Deals out of 3,797 listings starting at $1,495
Used Dodge Ram 1500
412 Great Deals out of 10,832 listings starting at $1,400
Used GMC Sierra 1500
761 Great Deals out of 69,133 listings starting at $1,850
Used Jeep Wrangler
262 Great Deals out of 16,545 listings starting at $2,590
Used Ford Mustang
537 Great Deals out of 45,845 listings starting at $1,999
Used Toyota Tundra
438 Great Deals out of 34,679 listings starting at $2,990
Used Mazda B-Series Pickup
178 listings starting at $2,000

Used Cars For Sale

2011 Ford Ranger For Sale
30 Great Deals out of 912 listings starting at $4,990
2010 Ford Ranger For Sale
19 Great Deals out of 432 listings starting at $3,500
2009 Ford Ranger For Sale
17 Great Deals out of 325 listings starting at $3,499
2008 Ford Ranger For Sale
18 Great Deals out of 395 listings starting at $2,990
2007 Ford Ranger For Sale
20 Great Deals out of 318 listings starting at $2,990

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.