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 2,960
#2 Tom Demyan
Tom Demyan
Reputation 1,430
#3 kbro
kbro
Reputation 1,180
View All

Related Models For Sale

Used Ford Expedition"
601 Great Deals out of 18,524 listings starting at $1,700
Used Jeep Grand Cherokee"
1,160 Great Deals out of 56,209 listings starting at $995
Used Chevrolet Tahoe"
988 Great Deals out of 29,112 listings starting at $2,800
Used Ford F-150"
3,060 Great Deals out of 152,622 listings starting at $1,000
Used Dodge Durango"
430 Great Deals out of 21,247 listings starting at $1,495
Used Toyota 4Runner"
377 Great Deals out of 11,639 listings starting at $1,499
Used Nissan Pathfinder"
358 Great Deals out of 21,144 listings starting at $1,950

Used Cars For Sale

2015 Ford Explorer For Sale
11 Great Deals out of 32,214 listings starting at $24,995
2014 Ford Explorer For Sale
126 Great Deals out of 2,921 listings starting at $21,888
2013 Ford Explorer For Sale
253 Great Deals out of 4,238 listings starting at $16,495
2012 Ford Explorer For Sale
122 Great Deals out of 1,951 listings starting at $14,494
2011 Ford Explorer For Sale
105 Great Deals out of 1,701 listings starting at $14,905