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


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
Reputation 8,430
#2 Tom Demyan
Tom Demyan
Reputation 3,340
#3 tennisshoes
Reputation 1,930
View All

Related Models For Sale

Used Ford Expedition"
584 Great Deals out of 21,463 listings starting at $2,111
Used Jeep Grand Cherokee"
1,261 Great Deals out of 74,259 listings starting at $1,500
Used Ford F-150"
3,271 Great Deals out of 216,769 listings starting at $1,000
Used Chevrolet Tahoe"
1,141 Great Deals out of 36,609 listings starting at $1,695
Used Dodge Durango"
412 Great Deals out of 22,713 listings starting at $995
Used Toyota 4Runner"
388 Great Deals out of 18,866 listings starting at $2,400
Used Nissan Pathfinder"
487 Great Deals out of 25,028 listings starting at $1,500

Used Cars For Sale

2017 Ford Explorer For Sale
3 Great Deals out of 34,813 listings starting at $22,240
2016 Ford Explorer For Sale
266 Great Deals out of 10,838 listings starting at $19,999
2015 Ford Explorer For Sale
148 Great Deals out of 3,297 listings starting at $12,995
2014 Ford Explorer For Sale
328 Great Deals out of 5,609 listings starting at $9,999
2013 Ford Explorer For Sale
337 Great Deals out of 5,418 listings starting at $9,300