1996-1999 Regals + other models?

[po440]

Ok so I have a 1998 Regal LS nonSC Auto
Was having problems with A/c blowing weak at the dash vents and I thought it was the Passenger Air scrubber. I replaced it as I couldn't remember when it was last done. Didn't solve the problem but the air smelled better (no more rotting plant life). So I noticed that the bi-level and dash ducts were engaged even though The control was set to norm. After checking the obvious stuff (fuses, resister, relay, and running a 12v direct jumper to blower) I started checking vacuum lines. The 1/8 inch plastic line running from the intake at the power brake booster junction was intact. This line at one time gave me a PO440 code awhile back when it was pulled loose after taking off the engine noise silencer. So I figured this was not the problem. However I remembered that this problem began after a battery change. So after following the plastic line down and around the fender skirt just before the battery there is a tee one side runs to the vac tank under left fender. The other I don't know where that one runs. Anyway, the line running to the vac tank was brittle and when the battery came in contact with it must have snapped the line. Repaired with a piece of rubber line. All is well now.

 

[steelcity]

What is the code for p0440 ? Evap ?

 

[po440]

PO440 IS the code for small evap leak. Sometimes its the Gas cap leaking at the o-ring or not tightened all the way. Also can be anyone of the solenoids.

Purge on intake manifold passenger side(ish) facing front grill.

Gas tank purge-under rear left fender behind plastic skirt/well.

Gas tank pressure-on top of tank- access through trunk through trap door on floor under carpet.

That little vacuum line caused the mechanics and myself a major headache. Kept getting SES light after reset. We replaced all the solenoids because we ran a smoke leak test and couldn't find a leak anywhere in the evap system. When I took it home I started checking and replacing all the lines that were involved with the solenoids. I decided to use a vac pump on each solenoid and low and behold I got the SES light to go off when I applied vac to the purge sol on engine. I back traced the source and that's when I found the 1/8 inch vac line pulled out of its boot. Silicone on the tip and put it back in the boot. Bingo SES and code cleared... The problem with the climate control bit was accompanied with an intermittent SES light. I didn't get a chance to check it but I am willing to bet it was that PO440 code again as this busted HVAC line used that manifold line as the source of its vacuum. Obviously the HVAC problem had to exist during this time also, but it was winter and really didn't notice the problem until we used the A/C.

 

[po440]

The other side of the TEE runs to the HVAC!...DUH! Brain fart... of course it does.....