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 Coupe FWD

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.

3,155

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.
3,155

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 802 nationwide Cavalier listings starting at $1,695.

ZIP:

Chevrolet Cavalier Experts

  • #1
    John Saffrahn
    Reputation
    3,060
  • #2
    dandyoun
    Reputation
    1,380
  • #3
    mbar1
    Reputation
    1,230
View All

Related Models For Sale

Used Chevrolet Malibu
1,091 Great Deals out of 62,504 listings starting at $880
Used Honda Civic
832 Great Deals out of 60,528 listings starting at $950
Used Chevrolet Impala
565 Great Deals out of 34,343 listings starting at $1,100
Used Ford Focus
796 Great Deals out of 62,799 listings starting at $900
Used Chevrolet Camaro
442 Great Deals out of 31,709 listings starting at $1,450
Used Honda Accord
1,075 Great Deals out of 74,232 listings starting at $1,100
Used Toyota Corolla
960 Great Deals out of 66,681 listings starting at $1,699
Used Chevrolet S-10
12 Great Deals out of 1,207 listings starting at $1,600
Used Ford F-150
3,210 Great Deals out of 223,761 listings starting at $1,200
Used Toyota Camry
1,117 Great Deals out of 86,207 listings starting at $995
Used Nissan Altima
1,372 Great Deals out of 77,643 listings starting at $1,695
Used Ford Mustang
581 Great Deals out of 39,803 listings starting at $1,895
Used Chevrolet Silverado 1500
2,659 Great Deals out of 174,214 listings starting at $955

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.