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

5

Asked by 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

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

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 10,540
#2 Tom Demyan
Tom Demyan
Reputation 4,220
#3 tennisshoes
tennisshoes
Reputation 2,430
View All

Related Models For Sale

Used Jeep Grand Cherokee
1,041 Great Deals out of 72,529 listings starting at $1,200
Used Ford Expedition
424 Great Deals out of 23,826 listings starting at $1,500
Used Chevrolet Tahoe
588 Great Deals out of 33,583 listings starting at $1,375
Used Ford F-150
2,133 Great Deals out of 191,027 listings starting at $290
Used Dodge Durango
286 Great Deals out of 21,043 listings starting at $1,125
Used Toyota 4Runner
227 Great Deals out of 19,591 listings starting at $2,300
Used Nissan Pathfinder
316 Great Deals out of 22,211 listings starting at $2,200
Used GMC Yukon
425 Great Deals out of 20,532 listings starting at $1,495

Used Cars For Sale

2017 Ford Explorer For Sale
62 Great Deals out of 37,399 listings starting at $22,712
2016 Ford Explorer For Sale
127 Great Deals out of 3,817 listings starting at $16,995
2015 Ford Explorer For Sale
180 Great Deals out of 4,848 listings starting at $12,997
2014 Ford Explorer For Sale
258 Great Deals out of 5,594 listings starting at $8,995
2013 Ford Explorer For Sale
90 Great Deals out of 2,730 listings starting at $8,900

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.