Chukkieegg Posted January 13, 2020 Author Report Share Posted January 13, 2020 Mines defo a manual lol but worth checking the grommet I guess lol Link to comment Share on other sites More sharing options...
972.5boxster Posted January 13, 2020 Report Share Posted January 13, 2020 Link to comment Share on other sites More sharing options...
972.5boxster Posted January 13, 2020 Report Share Posted January 13, 2020 You see the little valve with the thin pipe coming out of the valve in the bottom right of the photo? Well the other end of that pipe is what seems to fit into the nipple/grommet thing on the intake. Had fallen out on mine. Link to comment Share on other sites More sharing options...
Chukkieegg Posted January 13, 2020 Author Report Share Posted January 13, 2020 972.5boxster your pic is defo different setup to my 2.5 boxster I defo don't have a small pipe like that what age is you boxster? Link to comment Share on other sites More sharing options...
972.5boxster Posted January 13, 2020 Report Share Posted January 13, 2020 Really early. First registered may 97. Link to comment Share on other sites More sharing options...
Chukkieegg Posted January 13, 2020 Author Report Share Posted January 13, 2020 OK sure someone with more knowledge than me will claryify but I defo ain't got a vac pipe like that can I ask is the throttle body a cable controlled one? As diagram is the intake setup for a2. 7 and 3.2 from memory thr 2.5 only has 1 pipt between the intake manifolds wondering if you're intake has been swapped at some point Link to comment Share on other sites More sharing options...
972.5boxster Posted January 13, 2020 Report Share Posted January 13, 2020 Hi, yes mine is cable controlled. Diagram may be a later version, just used a generic parts catalog it may not include all revisions I suppose. Link to comment Share on other sites More sharing options...
the baron Posted January 14, 2020 Report Share Posted January 14, 2020 13 hours ago, Chukkieegg said: 972.5boxster your pic is defo different setup to my 2.5 boxster I defo don't have a small pipe like that what age is you boxster? You will have this pipe it’s right at the back and a pig to get to, my car is a jan 1997 2.5 so earlier than yours, so if mine has it yours will. Link to comment Share on other sites More sharing options...
the baron Posted January 14, 2020 Report Share Posted January 14, 2020 @Chukkieegg did you sort the problem? I had a friend fill the other day and experience similar issue to you, and it turned out to be the petrol, it had water in it from the petrol station, loads of cars experienced and posted up on a local forum, just a thought if your still have it issues Link to comment Share on other sites More sharing options...
Chukkieegg Posted January 14, 2020 Author Report Share Posted January 14, 2020 OK so headers were shot and I hot a cheap set off ebay exhaust specliast fitted last Monday and car is loads better but defo not missing just revs are now erratic on Tickover I then have been ill and was unable to drive for a few days and now away for a well earned break so can't investigate further it did get different brand of fuel on last fill but not a supermarket brand so will take a look when I get back once again thanks for the info @the baron Link to comment Share on other sites More sharing options...
Boxstclever Posted January 14, 2020 Report Share Posted January 14, 2020 Have you cleaned the throttle body? The gunk build up can cause erratic idle. Link to comment Share on other sites More sharing options...
Chukkieegg Posted January 14, 2020 Author Report Share Posted January 14, 2020 @Boxstclever did clean throttle body last summer but didn't remove the black plastic part attached so maybe need to dismantle again and take the black plastic off and clean that part of throttle body as well did see a video on it so could be possible cause Link to comment Share on other sites More sharing options...
edc Posted January 14, 2020 Report Share Posted January 14, 2020 If you have played with the intake check for vacuum leaks. Link to comment Share on other sites More sharing options...
Chukkieegg Posted March 21, 2020 Author Report Share Posted March 21, 2020 OK I know not posted for ages Tickover is still lumpy on idle and fluctuates having relooked at this thread I do think the little vac pipe is missing /disconnected from the rubber ring that goes onto the throttle body chamber if I can find the valve it connects to will it most likely be fitted to it still and does it just push fit into the rubber ring? Think as most likely we will be in lock down shortly due to coronavirus will have time to find it lol Link to comment Share on other sites More sharing options...
IHC Posted June 30, 2020 Report Share Posted June 30, 2020 Chukkieegg - did you get to the bottom of this was it an O2 sensor after your graph analysis? I've done similar and they do appear to report quite differently. My 1997 2.5L is suffering the same, occasionally dropping from idle to stall at lights etc. So its had, new plugs and coils, oil change, air filter (all due anyway) and a throttle body clean. After all this love it is still reporting: Current Fault Log, P0300: Random/Multiple Cylinder Misfire DetectedP0304: Cylinder 4 Misfire DetectedP0305: Cylinder 5 Misfire DetectedP0306: Cylinder 6 Misfire DetectedIt tends to idle fine when cold, but when warm gets lumpy as it drops to 800rpm and then occasionally drops further sometimes to the point of stall. O2 sensors look like: Green is Bank 2 which seems to jump around a lot more than Bank 1 in red Link to comment Share on other sites More sharing options...
IHC Posted July 3, 2020 Report Share Posted July 3, 2020 So I spoke to my local indy 'Black Country Porsche' who was very helpful, recognising at worst to could be chain guides/variocam. However his suggestion, before doing anything else just put a new MAF in. One Bosch MAF latter and idle is rock steady and sweet so that's a big win. It's a bit high now though at about 1050rpm. So I'll see if it settles, Ive already failed to find any air leaks, my next step will be a further clean of idle control valve. Good progress, I'm very pleased with a non-shaking idling car even if a little high. Link to comment Share on other sites More sharing options...
Chukkieegg Posted July 3, 2020 Author Report Share Posted July 3, 2020 I do think it may be the vac pipe just not had any chance to look at it on mine need a dry day as don't have a garage and also been busy at work Link to comment Share on other sites More sharing options...
½cwt Posted July 3, 2020 Report Share Posted July 3, 2020 1 hour ago, Chukkieegg said: I do think it may be the vac pipe just not had any chance to look at it on mine need a dry day as don't have a garage and also been busy at work Did you clear stored data in the ECU, as it may still be running the adjustments it made to compensate for the duff MAF. Link to comment Share on other sites More sharing options...
Chukkieegg Posted July 25, 2020 Author Report Share Posted July 25, 2020 OK finally managed to take a look today Clear dtc codes 3of em all exhaust related but it's is running rich and possibly got a slight blow on exhaust which I think may be os cat Anyway found the vac pipe and have managed to refit revs loads better on Tickover so I know what to look for next time I clean the throttle body 😂 Link to comment Share on other sites More sharing options...
Jeremy Nicholas Posted December 2, 2020 Report Share Posted December 2, 2020 Hello, friends, I am almost new to Boxster 2.5/986/1998, done 94349 miles, as I am having the same story, RAC called and reported B1/4-5-6 multiple misfire, they advised don't start the car, as there is chain stretched, smell of rich gas....... but I changed, the after market MAF sensor, new plugs, TB all complete cleaned, all TB new clamps. Now, sounds much better no misfire, 2 minutes later slight rough engine running, with 900rpm, when heaters turned on RPM goes up and back on 900, The major problems before were the air intake leaks, it is absolutely smooth running, apart from these frightening misfires........please help me. Much appreciated. The fuel was only on 3liters, I only wanted to fill up half tank and see any improvements, would you all guys may advice on changing the RON's please, NB: last week l also I addended some fuel treatment in the fuel tank....would that make any mal-functions please? Link to comment Share on other sites More sharing options...
½cwt Posted December 3, 2020 Report Share Posted December 3, 2020 Low or bad fuel won't help but that would affect all cylinders not just 4,5,6. I think you need a Porsche specialist to help avoid costly damage. Link to comment Share on other sites More sharing options...
Natplant Posted December 3, 2020 Report Share Posted December 3, 2020 On 12/2/2020 at 7:34 PM, Jeremy Nicholas said: Hello, friends, I am almost new to Boxster 2.5/986/1998, done 94349 miles, as I am having the same story, RAC called and reported B1/4-5-6 multiple misfire, they advised don't start the car, as there is chain stretched, smell of rich gas....... but I changed, the after market MAF sensor, new plugs, TB all complete cleaned, all TB new clamps. Now, sounds much better no misfire, 2 minutes later slight rough engine running, with 900rpm, when heaters turned on RPM goes up and back on 900, The major problems before were the air intake leaks, it is absolutely smooth running, apart from these frightening misfires........please help me. Much appreciated. The fuel was only on 3liters, I only wanted to fill up half tank and see any improvements, would you all guys may advice on changing the RON's please, NB: last week l also I addended some fuel treatment in the fuel tank....would that make any mal-functions please? Is it putting on cel light? Link to comment Share on other sites More sharing options...
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