problems with my L67 - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 04-06-2007, 08:09 PM   #31
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ok i will start running premium and i will also get a fenderwell intake from intense as soon as i can. anything else for the shopping list?
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Old 04-06-2007, 08:36 PM   #32
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Quote:
Originally Posted by dillcc
PREMIUM ONLY!!!!! You're probably getting MASSIVE Knock Retard running 87. Due to excess heat from the supercharger compressing the air, anything less than premium will pre-detonate and your computer will pull timing. That Hot Air Intake is only compounding the issue. For now, just put back on the stock intake and fill that baby up with 93 if available - 91 MINUMUM. Don't drive hard until all that regular is burned off.
the stock airbox was lost a long time ago after the numeras moves i've done in the last couple years. so i guess until i can get the intake from intense. any other ideas?
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Old 04-06-2007, 09:32 PM   #33
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Got a scantool?
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Old 04-07-2007, 05:40 AM   #34
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i tried buying one. but i was told that it was discontinued........oh and i ran my gas out and filled up on premium. yeah there is a differense. thanks for that pointer
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Old 04-07-2007, 04:35 PM   #35
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Afew questions first...

Do you have a 3inch DP? If not get one
What PCM was used?
If it was your stocker-stock L36 PCMs WIL NOT READ THE BBV solenoid , but you don't need the solenoid anyways.

Do a search for bypassing the BBV solenoid..This will help you out tremendously..
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Old 04-07-2007, 04:59 PM   #36
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Bad advice here. Adding a 3 inch downpipe to an L67 that isn't running right could cause more complications and undue cost. The downpipe has nothing to do with the poor running car.

NEVER bypass the boost control solenoid. The PCM won't be able to dump boost in critical situations to protect the engine. For a daily driver, ALWAYS keep the BCS. And I'm assuming this is a daily driver.

Get a scantool. You really shouldn't be tackling a swap like this without one.
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Old 04-07-2007, 08:48 PM   #37
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Mr. Wren

I beleive your missing the point.. An L36 PCM WILL NOT read the solenoid! Even if the file is encoded into the PCM. So thereforehe will never have a good running car, unless he sends the pcm back to Intense.
There are ways to bypass the solenoid-NOT THE BBV. And I agree everyone should keep the BBV.

What ppl. don't understand is swapped cars using the stock (or reproged) L36 PCM is the BBV solenoid does read. If he used a PCM from an L67 car and had the same file the PCM would control boost.

You guys over here don't have a lot of experience with the TS/swapped cars, so if you don't want my help fine.

And your right-bad advice to free up the exhaust and possibly lower KR

And I agree with getting a scantool, it should've been purchased before the swap. Or at least have full time access to one for the first few weeks afterwards.

Sorry-my bad
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Old 04-07-2007, 08:49 PM   #38
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double post, so I guess I'll try to make good use of it :P

http://www.clubgp.com/newforum/tm.as...de=&*=#3681073

http://www.clubgp.com/newforum/tm.as...de=&*=#3708874

Read the 2nd thread.. I can find MANY more that describe the exact same issue the poster is describing. BBV solenoid
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Old 04-07-2007, 09:50 PM   #39
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The SOLUTION is to get the BCS working by whatever means, the correct PCM would be best. You stated bypass, which we've found to be a bad idea. Do a search to find it.

BBV? We have a BCS and a BCA. Those are the terms we use per the FSM for consistency'* sake.

Modifying a poor running car by any means (including downpipe) is a bad idea. It'* a waste of money, as the DP isn't causing his issues. Whether a DP would lower KR or not isn't the point. He doesn't even know if he has KR. He has no scantool. And stock L67'* run with no KR with stock downpipes.
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Old 04-07-2007, 10:07 PM   #40
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No need to have this twice :P
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