I'v been working on a trouble code po171, comes and goes, have changed both of the O2 sensors, looked all over for a vacuum leaks didn't find any, I noticed that the vacuum line going to the fuel pressure regulator doesn't have any vacuum on it??? Is this normal?? I checked the line and its clear, pulled the housing off the throddle vlv and have alot of vacuum there but not pulling anything on the regulator....is there a problem??? its a 2003 chevy cavalier 2.2 eng

10

Asked by Mar 21, 2012 at 09:12 AM about the 2003 Chevrolet Cavalier Base Coupe

Question type: Maintenance & Repair

5 Answers

First thing to check is your fuel pressure. It should be 50-60 psi with the key on and engine off. Do you have any other trouble codes along with it? Does it have an actual driveability issue? Meaning can you tell that it is not running right? Does it cut out, die or? When the code was read did they/you check the freeze frame data? A quick way to check if there is a hole in the diaphragm of the fuel pressure regulator is to smell the vaccuum hose going into it. It should not smell like fuel. There are many things that could cause your problem so it is a gradual process of elimination. Do not start taking stuff apart and changing out parts. This is a common mistake and will compound your problem and cost lots of money. There could be contaminates in your fuel, a plugged filter, a bad injector etc etc etc.

3,125

what r the conitions outside when light comes on? ei. cold wet hot ive had to replace intake gasket on one before

10

It doesn't seem to matter what the weather is, I took and sprayed carb. cleaner all around the intake and didn't find any change in the eng.......not saying thats not it, just that it didn't change the way the eng. was running.....

10

"BadGirl", fuel psi is 55, no other trouble codes, it drives fine till the code comes up then die's but starts back up, guess I am not sure about the freeze frame data, no fuel smell in the vacuum hose, I'll take a closer look at the fuel in the tank and filter......what bothers me is there's no vacuum on the hose going to the fuel pressure regulator, that has me puzzled......

1 of 1 people found this helpful.
3,125

id take the trottle off and clean that port of throttle body no vacuum equal higher fuel pressure try sticking a paperclip in there with throttle body cleaner to clean it out and clean throttle plate and bore

Your Answer

Cavalier

Looking for a Used Cavalier in your area?

CarGurus has 882 nationwide Cavalier listings and the tools to find you a great deal.

ZIP:

Chevrolet Cavalier Experts

  • #1
    John Saffrahn
    Reputation
    3,050
  • #2
    dandyoun
    Reputation
    1,360
  • #3
    mbar1
    Reputation
    1,220
View All

Related Models For Sale

Used Chevrolet Malibu
977 Great Deals out of 65,934 listings starting at $1,000
Used Chevrolet Impala
544 Great Deals out of 35,192 listings starting at $900
Used Chevrolet Camaro
433 Great Deals out of 30,717 listings starting at $2,495
Used Toyota Corolla
782 Great Deals out of 53,913 listings starting at $1,200
Used Honda Civic
753 Great Deals out of 69,402 listings starting at $1,000
Used Ford Mustang
590 Great Deals out of 36,206 listings starting at $1,200
Used Ford Focus
803 Great Deals out of 55,008 listings starting at $800
Used Honda Accord
1,024 Great Deals out of 57,886 listings starting at $1,099
Used Chevrolet Silverado 1500
2,260 Great Deals out of 168,224 listings starting at $1,000
Used Pontiac Sunfire
298 listings starting at $2,100
Used Toyota Camry
931 Great Deals out of 80,594 listings starting at $1,440

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.