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Thread: new maf cold air running rough
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05-02-2018, 12:53 PM #11
thank you for looking into it
Last edited by brota; 06-21-2018 at 12:52 PM.
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05-02-2018, 02:53 PM #12
never heard of using "gumout" to test for vac leaks around manifold....starter fluid, yes.
The MAF is directional...I assume you have it installed so the arrow points towards engine?
Maybe that new Delphi style blade MAF is bad. FWIW I tried one and it worked fine...does not mean everyone is though
Fred is infinitely more versed in understanding data logs than me but a rich condition is often due to a vacuum leak after MAF
Maybe your "ebay intake" is not sealing as it should
you mentioned you had "MAF problem" before which apparently prompted you to replace MAF...are you sure the wiring to it is good and you have plugged in the connector the right way96 BBB 383/T56
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05-02-2018, 08:45 PM #13Xtreme Member
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Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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05-02-2018, 09:58 PM #14
yes it has a screen it
it is metal pipes
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05-02-2018, 09:59 PM #15Xtreme Member
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Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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05-10-2018, 09:28 PM #16
Hello
well got it back together fire damaged was only a few tubes.
I verified the cold air was tight.
I fixed any hoses that looked questionable.
Tested fuel pressure it was about 43, 38 running held pressure for about 30 min.
Check engine did not come back on with lean condition.
Here is the latest log.
https://black55chevy-my.sharepoint.c...OPmPg?e=8UMTV8
I was driving it, it seems to hesitate somewhere between 1200-2000.jpeg.JPGLast edited by brota; 05-10-2018 at 09:31 PM.
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05-14-2018, 03:52 PM #17
tested vacuum lines again by spraying carb cleaner around nothing seemed to make the engine surge.
Anyone have an idea why the car hesitates at around 1200?
Thank you
Brian
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05-14-2018, 09:25 PM #18LTx Guru
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I'll try and take a look at the data log. I was away over the weekend.
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05-14-2018, 09:45 PM #19
Thank you I do appreciate it.
The hesitation seems to be a common lt1 issue but nothing really solid as a fix.
It doesnt happen when the car is cold, which is strange.
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05-15-2018, 07:48 AM #20
the issue is still there when I unplug the MAF, it only seems to happen underload not in park
Last edited by brota; 05-15-2018 at 08:24 AM.
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