evap leak

[dc03]

whats the most effective way to find such a leak

[BobbyP]

Snip from:

http://www.denlorstools.com/home/dt1...h_article.html

Unless the evaporator has a fast leak, it can be the most challenging component to check. The evaporator can be checked with an electronic leak detector at the evaporator drain tube (careful not to stick the probe in water). Another clever idea is to use a fiberoptic borescope to snake through the evaporator drain tube (most are water resistant). With the fiberoptic borescope light turned on, you may actually see dye on the evaporator fins.

[ssicarman]

Originally Posted by dc03

whats the most effective way to find such a leak

Year, model, actual trouble code number????


Also apparently Evap Emision System or AC evaporator core problem--to clarify it for sure.

Originally Posted by BobbyP

Snip from:

http://www.denlorstools.com/home/dt1...h_article.html

Unless the evaporator has a fast leak, it can be the most challenging component to check. The evaporator can be checked with an electronic leak detector at the evaporator drain tube (careful not to stick the probe in water). Another clever idea is to use a fiberoptic borescope to snake through the evaporator drain tube (most are water resistant). With the fiberoptic borescope light turned on, you may actually see dye on the evaporator fins.

[Bigdaddy94sc2]

Originally Posted by BobbyP

Snip from:

http://www.denlorstools.com/home/dt1...h_article.html

Unless the evaporator has a fast leak, it can be the most challenging component to check. The evaporator can be checked with an electronic leak detector at the evaporator drain tube (careful not to stick the probe in water). Another clever idea is to use a fiberoptic borescope to snake through the evaporator drain tube (most are water resistant). With the fiberoptic borescope light turned on, you may actually see dye on the evaporator fins.

Is it mean if I started to chuckle? Maybe, because you did try to help.

I think the poster is referring to EVAP system leaks (Emissions Vapor Recovery)

More than likely, it is probably a bad seal on your gas cap, if not, it could be a number of things. Post year/model/ code number/ recent repairs, if any for more help.

[dc03]

2000 saturn sl1 the trouble code is p0442 evap system small leak detected and i also must add a thanks to u guys u have been rather helpful

[ssicarman]

Originally Posted by dc03

2000 saturn sl1 the trouble code is p0442 evap system small leak detected and i also must add a thanks to u guys u have been rather helpful

Most common source of this code is that the gas cap has not been tightened down enough. From there as Bigdaddy94sc2 said a bad gas cap. Believe it or not a bad PCM temps sensor or even a bad thermostat.



Subject: SES Lamp On with DTC P0442 EVAP System Small Leak Detected Set (Diagnose Evaporative Emission (EVAP) System, Repair as Necessary) #05-06-04-049 - (08/17/2005)



Models: 2000 Saturn S-Series Vehicles

with 1.9L Engine (VINs 7, 8 - RPOs LL0, L24)



Condition
Some customers may comment that the Service Engine Soon (SES) lamp is illuminated.

Upon further investigation, technicians may find diagnostic trouble code (DTC) P0442 "EVAP Small Leak Detected" set.

Cause
One of several EVAP system component issues may cause a DTC P0442 to set in the PCM and illuminate the SES light.

Correction
Refer to DTC P0442 diagnostic procedures in the appropriate 2000 Saturn S-Series Service Manual or SI to diagnose and repair the vehicle as necessary. If there is no concern found, follow the diagnostic steps listed in the "Service Procedure" section of this bulletin and repair as necessary.

Service Procedure
Perform the following inspections and repair, if necessary:

Inspect both ends of all EVAP circuits for damaged and/or spread terminal pins.
Inspect the coolant temperature sensor connector for corroded, damaged, and/or spread pins.
Remove the coolant temperature sensor and inspect the temperature-sensing probe to determine if it is composite (plastic). If so, replace the coolant temperature sensor with a new sensor, which will contain an all-brass temperature-sensing probe. Replace the thermostat.

[dc03]

now heres the thing ive already bought a new gas gap but i had other codes that went away when i did this also my car vibrates pretty bad when at a stop now is this evident that there may also be a vacum leak???? or may other problems exist i changed two of the motor mounts the dog bone on the driver side and the top moter mount on the pass side because i thought that it might also be causing the vibrations

[BarnOwl]

Originally Posted by ssicarman

Remove the coolant temperature sensor and inspect the temperature-sensing probe to determine if it is composite (plastic). If so, replace the coolant temperature sensor with a new sensor, which will contain an all-brass temperature-sensing probe. Replace the thermostat.

Did you do the above??? That can certainly cause your problems. Do that and if you still have a problem, I'd say the cannister purge solenoid is next.

[dc03]

i will try this and let u guys know if it works but why does it cause these problems and by the way thanks a million for all ur help

[dc03]

ok well the codes went away and havent come back i changed the coolant temp sensor as told but my car still has issues it vibrates when at a stop and as soon as the peddle is pressed it stop vibrating i have had ppl tell me many things that can cause this 1 spark plugs i changed them and the wires i then changed the dog bone mount on the driver side and the top mount on the pass side i havent yet changed the dog bone on the pass side but......... ive been also told that vacum leak could cause such a prob (vibration) but i dont know im at a loss here can someone please help me

[ssicarman]

A vacuum leak will normally cause a high idle rather than a vibration.

It may be that the engine is vibrating from a rough idle or an engine miss. Check plugs, wires and coils. As well as the intake manifold to head gasket for a vacuum leak.

[Bigdaddy94sc2]

Sounds like Intake Mani gasket to me! Use some carb cleaner and spray along the back of the engine, where the intake meets the head, near the passenger side, near cyl #1, and see if the idle changes. If it does, you have an intake gasket leaking vacuum.....