I have a 2000 mercury marquis with v8 it runs fine for awhile then usually on an incline it looses power and backfires a little , I pull over an Rev it a couple times and it will start to run normal a

Asked by Dec 05, 2015 at 05:30 PM

Question type: Maintenance & Repair

This  usually happens at speed over 50mph
. Have replaced fuel filter

2 Answers

61,045

Try running a good fuel system cleaner through a couple of tanks of gas. I like Seafoam and Chevron Techron.

24,445

Give it a tune up, loss of power and backfiring might mean something's amiss with the spark/ignition, the backfire caused by unburned air/fuel mixture igniting in the cat, you'll have to run some diagnostics, maybe the problem is in the PCM and/or sensors like camshaft sensor). Any trouble codes?

2 of 2 people found this helpful.

Your Answer

Add photo

Related Questions

Shortcuts

Search Maintenance & Repair Questions

Maintenance & Repair Experts

#1 Tom Demyan
Tom Demyan
Reputation 169,230
#2 dandyoun
dandyoun
Reputation 91,700
#3 tenspeed
tenspeed
Reputation 74,010
View All

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.