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.

2,945

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 out of 1 people think this is helpful.
2,945

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

Add photo

Related Questions

Cavalier

Looking for a Used Cavalier in your area?

CarGurus has 1,059 nationwide Cavalier listings and the tools to find you a great deal.

ZIP:

Search Chevrolet Cavalier Questions

Chevrolet Cavalier Experts

#1 John Saffrahn
John Saffrahn
Reputation 2,890
#2 dandyoun
dandyoun
Reputation 1,290
#3 mbar1
mbar1
Reputation 1,170
View All

Related Models For Sale

Used Chevrolet Malibu
827 Great Deals out of 81,055 listings starting at $995
Used Chevrolet Impala
515 Great Deals out of 29,109 listings starting at $1,100
Used Chevrolet Camaro
153 Great Deals out of 32,676 listings starting at $1,995
Used Honda Civic
491 Great Deals out of 87,957 listings starting at $1,499
Used Honda Accord
717 Great Deals out of 87,000 listings starting at $1,250
Used Ford Mustang
364 Great Deals out of 46,830 listings starting at $1,999
Used Ford Focus
542 Great Deals out of 56,093 listings starting at $800
Used Toyota Corolla
665 Great Deals out of 71,481 listings starting at $600
Used Pontiac Sunfire
316 listings
Used Dodge Neon
703 listings starting at $1,950
Used Toyota Camry
831 Great Deals out of 89,153 listings starting at $950
Used Chevrolet Silverado 1500
1,730 Great Deals out of 167,270 listings starting at $1,800
Used Nissan Altima
847 Great Deals out of 78,711 listings starting at $1,677