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  1. #1
    Join Date
    Apr 2013
    Location
    Springfield, VA
    Posts
    27

    Default PCV job done, now car won't idle

    Okay, I am pretty much an amateur, but I did the PCV job on my 2003 XC70 (214,000 miles).

    A little harder than I had hoped, but got everything back together. I used the IPD kit.

    Anyways, I rehooked the battery, doublechecked all hoses and started it. Very rough idle then dies. Tried it a couple of time more. On one occasion it seemed to work fine, idled at about 1100 like it was warming up, then dropped down and died.

    I had pulled the ETM off to clean it, and in doing so I broke the plastic locks on the side of the connector, but it seems to be on so I am not sure that is a problem.

    I am at a loss. Does this sound like I destroyed the ETM? There is just the six pin connector for the ETM, right? No separate ground wire or anything?

    Anyways, any ideas would be greatly appreciated. I really don't think taking it all apart would accomplish much, but I can imagine the bill I would get for a dealer to troubleshoot and fix...

  2. #2
    Join Date
    Feb 2010
    Location
    Virginia Beach
    Posts
    3,853

    Default

    Sounds more like a vacuum leak...I would check all the connections, particularly the ones that are hard to see...which on this stupid job describes almost everything...
    Current Fleet:
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    2005 MB S600 (100K, Michelin AS3+, M1 0W40)
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  3. #3
    Join Date
    Apr 2013
    Location
    Springfield, VA
    Posts
    27

    Default

    Well, on a longshot I pulled the MAF sensor connection, and lo and behold the car runs fine. I have a 'Engine service required' warning, but considering the MAF is disconnected that probably makes sense.

    Would a bad MAF cause the horrible idle/stalling? I wonder if pulling it to clean is worthwhile, or just replace it.

    So I guess I add a MAF cleaning/replacement to my broken oil dipstick and broken coolant temp sensor due to my ham-handed maintenance skills...

  4. #4
    Join Date
    Apr 2011
    Location
    Northern CA
    Posts
    227

    Default

    Two thoughts come to mind:
    1) is the connector on the ETM fully seated? Try removing and reseat. It is a PIA given it is under the manifold but would cause an erratic idle.
    2) did you replace the gasket between the ETM and the manifold? If you reused that could be contributing.

  5. #5
    Join Date
    Apr 2011
    Location
    Tampa, FL
    Posts
    107

    Default

    Quote Originally Posted by Astro14 View Post
    Sounds more like a vacuum leak...I would check all the connections, particularly the ones that are hard to see...which on this stupid job describes almost everything...
    X2 on the vacuum leak.
    Jim<><
    '04 XC70 AWD CrossCountry 2.5T
    '99 Land Rover Discovery I (sold )
    '86 Saab 900i (sold a long time ago...)

  6. #6
    Join Date
    Jun 2012
    Location
    Upstate, NY
    Posts
    43

    Default

    Quote Originally Posted by 9dawgs View Post
    X2 on the vacuum leak.
    X3 on the vacuum leak.

  7. #7
    Join Date
    Nov 2011
    Location
    Dover, NH
    Posts
    196

    Default

    This is too funny. Well, not really, but I can relate to a few things.

    I just did this same job on my XC in December. A week went by and my wife called me after she dropped the kids at school saying the car would not start. I went there thinking the worst. Before I popped the hood I gave it a try. It would start and then die immediately. I popped the hood and there was the pipe hanging off the MAF with a not-at-all tight clamp. I couldn't believe that 1, I didn't tighten it and 2, It was driven daily for a week before it became a problem. After reconnecting the pipe it started right up.

    On the first repair I did (radiator replacement) I had read a walk through that warned about being careful about breaking the oil dipstick. I thought to myself "What kind of idiot would not be careful enough and do that?" Turned out I was one of those idiots.

    Good luck with your problem.
    2005 XC70 Ruby Red
    2007 V70R GT 477/Nordkap

  8. #8
    Join Date
    Apr 2003
    Location
    Devon PA
    Posts
    11,409

    Default

    Vacuum leak
    All emails please use: jrl1194 (at) aol.com

    2007 V70 2.5T White/Oak, 112K miles. My daily driver and GORGEOUS
    2000 V70R wife's. Won't sell, now at 148K miles !! and still (almost) perfect.
    2000 S70 GLT SE with 29,000 miles!!! A time capsule, V70R front bumper, Volans, etc. SOLD!!! (I Will regret selling this!)

  9. #9
    Join Date
    Apr 2013
    Location
    Springfield, VA
    Posts
    27

    Default

    Okay, just went out again, all hoses appear to be connected. The only one I couldn't pull on to check is one of the TCV hoses (the one that goes back to the turbo). The engine is still hot and I don't feel like getting burned.

    Anyways, I understand that the consensus is my problem is a vacuum leak, however I do not understand how that jibes with my symptoms. I changed out the MAF with a brand new one (goodbye $180), and everything seemed to run fine after a single instance of sputter and die. Drove the car around for the afternoon, everything seemed fine. In the evening drove for a while, stopped at a 7-11, came back out and the car would sputter and die when I started it. I disconnect the MAF, and the car runs fine. Reconnected MAF, car kept running. Stopped at next spot, tried to restart car with no success. Same disconnect MAF, start car, reconnect MAF, but now car is needing to have this process repeated a couple of times.

    I don't want to continue easter-egging this, because now I fear I bought a new MAF for no reason. I am thinking I will get the car running and drive to autozone and see if they can pull a code, but I am sure I have filled the computer with codes with all of the disconnecting and everything else.

    My gut feel is this is electrical, which puts me in the position to have to take it to the dealer, which of course I want to avoid.

    In answer to below questions regarding ETM; I have reseated the connector several times, and I did use a new gasket when I reinstalled it (I got the gasket from the dealer).

    So based on the above and my lack of finding obvious vacuum leaks (meaning no dangling hoses), should I try something else, or keep looking for a vacuum leak?

  10. #10
    Join Date
    Apr 2011
    Location
    Tampa, FL
    Posts
    107

    Default

    Quote Originally Posted by youropeen View Post
    On the first repair I did (radiator replacement) I had read a walk through that warned about being careful about breaking the oil dipstick. I thought to myself "What kind of idiot would not be careful enough and do that?" Turned out I was one of those idiots.
    Haha, well I must be one too. I broke mine off as well when I did mine a couple of weeks ago.
    Jim<><
    '04 XC70 AWD CrossCountry 2.5T
    '99 Land Rover Discovery I (sold )
    '86 Saab 900i (sold a long time ago...)

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