BeachRat Posted July 21, 2006 Report Share Posted July 21, 2006 So new PCV box and hoses went in last weekend. Also replaced intake manifold gasket, as mandatory and new silicone vacuum hoses. Car starts up... and dies. It's as if the MAF were bad, it just won't idle. Except the MAF is less than 6 mos old, and I DIDN'T touch it during this repair.Jason diagnosed it as the EGR, as I re-used the gasket with some crappy sealant. I tried to get a new gasket, but it's "special order" and that just wasn't going to fly... Just don't shoot me for not trying. Okay, replaced the EGR with a brand new gasket tonight. Still having the same issues.Checked vacuum lines, nothing seems to be broken or disconnected. It's all new silicone and vac lines for the PCV box, so I'm just shot for ideas. It starts just fine, cranks over like it should. But it only pulls 10mmHg and dies if you don't rev the throttle. Runs really rough, rich as all hell and just won't stay up.I want to say it's a vac leak, but enough to only have 10mmHg vacuum? There is one massive hole somewhere! I'm most likely going to take everything back off, double-check and reassemble this weekend. Just looking for any ideas if anyone's got anything before I do all that damn work, again! Final kicker: no codes. None. Nada, zilch. The only one I've been able to throw is a 1-2-1 and that's after un-plugging the MAF. Edit: Since it's not in the sig: 103,000 miles, left hand drive, 2.3L turbo. Cup holders in the center console. Link to comment Share on other sites More sharing options...
dmelviØØ7 Posted July 21, 2006 Report Share Posted July 21, 2006 Sounds like something I did one time, check to make sure there is nothing obstructing the intake manifold from sealing to the head. Also be sure to make sure all of your hoses are connected, especially off of your intercooler. That's all I got, hope it helps. Link to comment Share on other sites More sharing options...
thelostartof Posted July 21, 2006 Report Share Posted July 21, 2006 when are you ripping it apart ... or putting it back together .. need my help? Link to comment Share on other sites More sharing options...
WhiteT5 Posted July 21, 2006 Report Share Posted July 21, 2006 It doesn't take much of a vacuum leak to make you drop to close to 10 mmHg. An open port on the vacuum tree will do it. Link to comment Share on other sites More sharing options...
A pimp named Slickback Posted July 21, 2006 Report Share Posted July 21, 2006 To add to this, if you hold the throttle open a little, you can keep it running. It runs like crap, misfiring and chugging. It almost seems as if it's "stackfiring". Link to comment Share on other sites More sharing options...
BeachRat Posted July 21, 2006 Author Report Share Posted July 21, 2006 It doesn't take much of a vacuum leak to make you drop to close to 10 mmHg. An open port on the vacuum tree will do it.I've actually driven the car like that before: I had the line to the cluster gauge disconnected at that little rubber piece under the hood. It definitely didn't cause a vac leak that bad!Current plan of action is to go back down to the PCV box, verify part numbers. The lower short coupler had a metal sleeve I'm not sure is supposed to be on there: wasn't on the old part. Link to comment Share on other sites More sharing options...
TM850R Posted July 21, 2006 Report Share Posted July 21, 2006 That metal sleeve is supposed to be on there. From what Ive read its a update on the old part. Did you connect the vacuum line well on the passenger side of the intake manifold. The line should come from the PCV "box" as you called it. Make sure that is nice and tight on there, that gave me a hell of a lot of trouble, and seemed to pop off every time I thought it was on. I just did the same thing as you over the weekend and only get 16 hg of vacuum. I still have a couple vacuum lines to replace but I dont know how much its going to help. Link to comment Share on other sites More sharing options...
lax01 Posted July 21, 2006 Report Share Posted July 21, 2006 did you mess with the FPR vacuum lines at all? did you make sure everything is connected to the vacuum tree? is the vacuum tree secure? did you connect everything to the pcv valve on the intake hose? ummmm...I ran outta ideas Link to comment Share on other sites More sharing options...
Fred1948 Posted July 21, 2006 Report Share Posted July 21, 2006 Use a 2 to 3 foot long piece of tubing (I usually use something with about a 3/8 i.d.); put one end in your ear and use the other end to move all over the engine and listen for leaks. Has pinpointed problems for me several times. Link to comment Share on other sites More sharing options...
BeachRat Posted July 21, 2006 Author Report Share Posted July 21, 2006 Thank you to all for your suggestions. I did get the vac line on the intake, running from the right side back to the intake pipe. Actually missed it the first time, and was uber-disappointed when it didn't fix the problem. As for the vac tree, is there supposed to be an o-ring or gasket that seals it on the intake manifold? All I see is hard plastic: hard to tell on a car that's been in Arizona it's whole life. Link to comment Share on other sites More sharing options...
lax01 Posted July 21, 2006 Report Share Posted July 21, 2006 Thank you to all for your suggestions. I did get the vac line on the intake, running from the right side back to the intake pipe. Actually missed it the first time, and was uber-disappointed when it didn't fix the problem. As for the vac tree, is there supposed to be an o-ring or gasket that seals it on the intake manifold? All I see is hard plastic: hard to tell on a car that's been in Arizona it's whole life.mine doesn't...i snapped the head off the bolt too and just used a metal screw and haven't had a problem...i doubt its The tree, unless its completely popped off...did you reconnect the IAC? Link to comment Share on other sites More sharing options...
BeachRat Posted July 21, 2006 Author Report Share Posted July 21, 2006 mine doesn't...i snapped the head off the bolt too and just used a metal screw and haven't had a problem...i doubt its The tree, unless its completely popped off...did you reconnect the IAC?It's connected, but to my custom piping. I'm still so baffled that something so major is not out in the blue like this. No minor "leak" would cause this problem! Link to comment Share on other sites More sharing options...
Fred1948 Posted July 21, 2006 Report Share Posted July 21, 2006 Thank you to all for your suggestions. I did get the vac line on the intake, running from the right side back to the intake pipe. Actually missed it the first time, and was uber-disappointed when it didn't fix the problem. As for the vac tree, is there supposed to be an o-ring or gasket that seals it on the intake manifold? All I see is hard plastic: hard to tell on a car that's been in Arizona it's whole life.There is supposed to be an o-ring. I replaced my dried up one about a week ago. I found one from an assortment that worked well. Link to comment Share on other sites More sharing options...
thelostartof Posted July 21, 2006 Report Share Posted July 21, 2006 where is the car? tempe or gilbert? want me to come by and help ya find it? Link to comment Share on other sites More sharing options...
partsguy Posted July 21, 2006 Report Share Posted July 21, 2006 Runs fine but won't idle?? When that happened to mine it was the idle air control valve, it was loaded with carbon, had someone take it off, clean it and all was fine. Link to comment Share on other sites More sharing options...
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