Post interference valve-job poor idle not vacuum; 'thoughts?

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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby moapys » Fri Aug 28, 2015 1:51 pm

I stand corrected; thanks *TONY*...will report out shortly!
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Re: Post interference valve-job poor idle; hoping not vacuum

Postby moapys » Sun Aug 30, 2015 5:25 pm

Quick update: I struck-out on the smoke re-test results (having made a jury-rigged bidge for past E46 troubleshooting), as it indicated no evident errant wisps.

I finally did a stomp test - I was foolishly late in considering that, having no CEL illuminated - to see if it reinforced the vacuum thesis; TADA = it yielded 1-2-2-2 (Lambda 1) code: This still can be sensors, vacuum, O2, etc; so I guess I am still back to checking final connections made upon finishing the head rebuild ; ...never any easy ones, I guess... If not an oversight in reconnection upon bundling up, I can only guess that I have loast a sensor somewhere, or have a truly insidious leak hiding from me.
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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby M20_fever » Mon Aug 31, 2015 3:24 pm

Does the idle get worse if you remove the oil cap? If not you have a vacuum leak. The o2 circuit on an e30 is very basic, you can unplug it and see if it changes. If it runs better unplugged you probably have a bad o2. Since the issue is not temp related you can probable rule out the CTS. If everything else checks out I would take a DMM to the AFm and see if it has a dead spot at idle.
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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby moapys » Tue Sep 08, 2015 2:28 am

<to the above; yes - oil cap removal worsens the idle dramatically - O2 connector remova made little difference>

Well - the latest...: I cleared the 1222 code - it was a holdover from past vacuum noodling - last several starts/trips resulted in no (eg 1444) code. Alas, so much for that red herring... I did re-adjust the valves, stone cold, they were a bit tight, so put them back to a solid .010 - and checked both ends of the rockers for .01 / .007 consistency...all good. I even checed the 02 sensor for good measure; proper waveform and voltage levels.

Finally, I took it to an independent ASE shop for a real smoke test - which they claimed it passed "with flying colors". Since the lumpy idle persists, I am throwing in the shop-towel and taking it to a specialist. I only hope they read my litany of tests run...versus assuming that they're starting-from scratch :-( ...I'll be sure to post the results (beyond wallet depletion) once received!
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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby Yoshi » Tue Sep 08, 2015 12:23 pm

Let us know what it is. At this point it sounds like maybe clogged injectors or something odd like that. You did all the basics so no fault on you for not trying hard.
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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby Ryki » Wed Sep 16, 2015 8:50 am

I'm with Yoshi, good effort put it in, here's to hoping it works out!
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Re: Post interference valve-job poor idle <believed> not vac

Postby moapys » Wed Sep 16, 2015 11:15 am

Thanks - and 'just got back from biz travel, which has delayed progress... I have been trying to reach my local "BimmerFixinHaus" (non stealership) but they haven't responded. May just drop it off - with my wallet - and hope for the best. I'll keep everyone apprised!
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Re: Post interference valve rework;still seeking "indie" in

Postby moapys » Sat Oct 03, 2015 3:54 pm

All - per the above, I began looking for e30 expertise in Indianapolis: I've now tried Merkle (dissatisfied/no-help), Mikar (great guys; too busy) - and it looks like I'm relegated to Reggies...who is well respected by the racers, but I suspect will be VERY costly as a "boutique shop"...

Does anyone have any favorite BMW service experts in the greater Indianapolis area? It's quite driveable - but wouldn't relish a trip to Chicago unless my only recourse. 'Continued thanks, guys.
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Re: Post interference valve-job poor idle not vacuum; 'thoug

Postby M20_fever » Mon Oct 05, 2015 12:33 pm

Way too far for you probably, but The Werk Shop in Libertyville is one of the best in the country. People send cars from around the world, and for good reason, but bring your wallet. http://www.thewerkshop.com/aboutUs/

Also Browns Motor Werks in Waukegan does very good work for reasonable prices. No website, just a small shop with an owner that specializes in BMW. http://www.yelp.com/biz/browns-motor-works-waukegan

Both places are north of Chicago, so it would be a hike.
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