Hey all,

Okay so I have read all other forums but Im gonna post this again. Been having this annoying P0172, replaced my MAF and its still here. Now I heard some other people had a vac leak near the power steering??? I looked and looked and cant seem to find the hose anywhere. Does anyone have pics?

Here are the symptoms: Slight delay in cranking at startup when cold. Maybe CTS??? Possible vac leak?

Thoughts are greatly appreciated.

Its a non turb 2.4 base btw

thanks

 

Cranking is the engine turning over. Slight delay would indicate that when you turn the key to "start" nothing happens for second or two and then it starts to crank. Or , , , are you saying it cranks more before it starts ??
Might be a bad ignition switch, poor connection at the battery or starter or in-between.

If you have a fuel pressure regulator on the fuel rail there is a vacuum line running under the intake that goes to the fuel pressure regulator. On a 97 there is a chance you're regulator is under the car or I'm thinking 70 series ??

 

Sorry for being unclear. The car seems to crank more before starting. Not much but you can tell some mornings.

I replaced the battery about a month ago, P0172 was there before that however.

I believe the regulator is on the fuel rail by the injectors but Ill have to double check. How can I test my lines? Blowing smoke down a one is what I have seen in the past.

There are a couple other threads that talk about a vacuum elbow on the left passenger side under power steering pump that attaches into the manifold??? Do you know anything about this?

Thanks

 

Other than the one in the picture I don't think there is one over there. If you pull up a "HOW TO" on PCV with pictures it should show you what's under there.

 

Why are you assuming you have a vacuum leak? Have you ckd?

A P0172 could be caused by a number of things:
OBD-II Trouble Code: P0172 System Too Rich (Bank 1)

 

From reading other forums, most point to a vac leak. I dont want to start throwing parts at this thing and hope it fixes the problem. Start cheap and work my way up. What do you suggest?

Tomorrow morning Ill take a few pics of what I think might be causing the problems. Cracked vac elbow and grease on lower intake after the MAF????? Dont know if a leaky injector causes that or not

 

You already replaced the MAF; is that your idea of not throwing parts at it and starting cheap?

Easiest way to find a vacuum leak is get yourself a spray can of carb cleaner (good idea to have fire extinguisher handy too) and start squirting in and around the intake manifold while engine is idling. If spraying on a particular spot/area changes the idle speed, then you found the leak. Also ck for vac lines coming from intake manifold that go no where (i.e. are disconnected).

There's a vacuum tree on top of the manifold on driver's side (under throttle linkage cover); it often breaks/cracks causing leaks. Looks for any vacuum plugs that came off, etc. etc.

All that being said, it could be other things; leaky injector, leaky fuel pressure regulator, etc. That's what I meant by seeing if you do have a vac leak before assuming you do...

 

Under tech tips its stating check vac lines first.

This is obviously for a V70 but also for the 850 models

 

This video will show the vacuum line that goes to the passenger side of the intake manifold. You will see it at 1:35.

 

Thanks sooo much rspi!!!!!!!!
Check out the vac hose after that and look at the pic!!! Huge gaping hole in it
Bet that is why Im getting my P0172
Anyways thanks again, now I can fix the problem

 

You are welcome. Hope it does the trick.

 

Update on the code.
Replaced the part and passed CA smog with flying colors. $5 repair in total!!!

Thanks again for everyones help