and we did a copression test by taking out the spark plugs and putting oil in the holes but theres no compression

Faizel
5

Asked by Faizel Mar 22, 2013 at 05:37 AM about the 1997 Ford Explorer 4 Dr XLT AWD SUV

Question type: Maintenance & Repair

Hi i have a FORD EXPLORER 4L V6 1997 i it dont want to start we check the fuel pump and spark plugs and thats fine when you start it back fires by the part where the air filter is can it be a valve or timing chain .

2 Answers

DavidH25
Not Active

Why would you put oil in the spark plug holes? That is NOT the way to do a compression test. Now if you did a proper compression test and there is no compression, them yes, it could be a timing chain, or if you only tested one cylinder, and no compression, the yes it could be a valve(s) The engine in your car is designed to run on a specific ratio of air to fuel (14 to 1). If this ratio increases by withholding fuel it can cause the engine to back fire through the intake system. The number one reason for this condition is a plugged fuel filter. A fuel-injected engine may backfire back up through the intake if an intake leak is present (causing the engine to run lean), or a fuel injection component such as an air-flow sensor is defective, ignition timing, a drop in fuel pressure, also causing an extremely lean fuel/air ratio. Check your PCV and EGR systems. Best way to do that is get your OBD codes read at a parts store, do not buy anything, write the codes down and bring them back here, one of us will be happy to help you figure out what to do next

DavidH25
Not Active

PLEASE tell me WHY did you "put oil in the holes"??

Your Answer

Add photo

Related Questions

Search Ford Explorer Questions

Ford Explorer Experts

#1 OJ
OJ
Reputation 5,010
#2 Tom Demyan
Tom Demyan
Reputation 2,000
#3 kbro
kbro
Reputation 1,390
View All

Related Models For Sale

Used Jeep Grand Cherokee"
824 Great Deals out of 57,213 listings starting at $1,995
Used Ford Expedition"
336 Great Deals out of 15,534 listings starting at $1,988
Used Chevrolet Tahoe"
390 Great Deals out of 25,765 listings starting at $1,991
Used Ford F-150"
1,864 Great Deals out of 110,132 listings starting at $1,350
Used Dodge Durango"
226 Great Deals out of 19,360 listings starting at $1,000
Used Nissan Pathfinder"
213 Great Deals out of 17,604 listings starting at $995
Used Toyota 4Runner"
229 Great Deals out of 10,192 listings starting at $2,388

Used Cars For Sale

2015 Ford Explorer For Sale
44 Great Deals out of 14,919 listings starting at $26,598
2014 Ford Explorer For Sale
114 Great Deals out of 3,522 listings starting at $18,995
2013 Ford Explorer For Sale
270 Great Deals out of 6,055 listings starting at $15,999
2012 Ford Explorer For Sale
42 Great Deals out of 1,732 listings starting at $13,994