MAF screen revisited - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-27-2005, 04:31 PM   #1
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Default MAF screen revisited

Since I changed to a rice pipe recently, I decided to take the MAF screen back out to see how the new intake would handle it. Well, idle quality is **** poor.

BUT... The car seems to pull harder than it has recently at the top end. It could be the temps being 15 degrees cooler than before I took it out (Friday afternoon), I don't know. MAF readings are no higher than normal.
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Old 09-27-2005, 04:36 PM   #2
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Most likely temps
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Old 09-27-2005, 04:39 PM   #3
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GM tuners did a test with a Maf and Non Maf and the non maf TB flowed better than the TB with the screen
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Old 09-27-2005, 04:41 PM   #4
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With that said.. there is something nice about your car idling properly.
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Old 09-27-2005, 05:15 PM   #5
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Would you think idle is related to the length of the pipe and size of the filter? My idle is and has always been fine with the rice pipe installed, but then again I cut a good inch or two off the end of it before I put it on, and my filter is smaller then most.
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Old 09-27-2005, 05:18 PM   #6
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I cut an inch and a half off the pipe and I'm using the ol' RX-4750.
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Old 09-27-2005, 05:47 PM   #7
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Hmm, im using some sort of stubby filter, it is K&N though. Where is your AIT sensor?
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Old 09-27-2005, 05:57 PM   #8
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In the hole that was already in the filter.
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Old 09-27-2005, 06:13 PM   #9
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On my 91, without the screen, the idle is **** poor... I had to reinstall the screen for a proper idle... Keep in mind I am not SC'd

I'm not sure what year it starts, I think 94, so 94 and later should idle fine without the screen... And in most cases while idling you could unplug the MAF and there shouldn't be much diffrence... I think my 91 stalls out when the MAF is unplugged... lol

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Old 09-27-2005, 07:48 PM   #10
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My 93 idled poorly for about a day when I took the screen out. It cleaned right up after that (this was on the stock throttle body, not the butchered TB).
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