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Join Date: Dec 2008
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Modified 930 Immissions Test

What is everyone doing to pass IM.
I have a 1988 930, 3.4, twin plugs, EFI, AEM management system, custom exhaust.
I just got the car running right and now need to pass IM.
I do have the original exhaust with CATS. Will simply bolting this on, get me through?
Thoughts.

Old 01-16-2009, 10:44 AM
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Location: Folsom, CA
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I just got through CA Smog test and I needed to: adjust my AFR, Idle speed, and install an exhaust system with a cat.
In addition I needed to find a place that would look the other way when performing the visual inspection. As my 930 is sans the smog/air pump, and with aftermarket IC and CAI.
Passed with a third of the allowable emissions, on all categories.
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Sean D. 1987 930
India Red/Beige/Black; Mahle 3.4L; Kokeln IC; K27 7200; GHL Headers; Borla Stainless Muffler; SC cams; Sachs Aluminum Clutch; Aluminum flywheel; Bilstein Sport Shocks; Adjustable Rear Sway Bar; Weltmeister Shock Tower Brace; Lowered and Corner Balanced; MOMO RSGT Seats...
Old 01-16-2009, 12:21 PM
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Guys/Gals;

For those of us in California, (and maybe in Utah?), aftermarket intercoolers are legal. A knowledgeable smog inspector should never question an aftermarket unit because it's considered a device that won't alter emissions in a harmful manner. Written affirmation is located in one of the Appendices in the back of the California Smog Manual. You can find in on the net.

UtahRuf, good luck passing your inspection. Sorry, I can't help you on Utah's rules. Here in Cali, you have a real problem. Scott
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Scott - 1987 930: 3.45L Supertec engine w/GT3 crank, California Motor Sports upgraded 930 trans, modified suspension, Zuffenhaus 9's and 11's, black on black..."The Black (Financial) Hole"
Old 01-16-2009, 01:59 PM
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You in Utah? Have visual inpection?
If not and your place is like Washington State, then just passing the emissions would probably require you to fab a pipe with catalyst.

Total cost about $150 plus your time / labor costs.
This is what I had to do -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
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Old 01-16-2009, 04:09 PM
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UtahRuf- PM sent

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Old 01-16-2009, 07:54 PM
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