# SR swap breaks up on tip in, sometimes WOT...

**URL:** https://forums.speedlife.net/t/sr-swap-breaks-up-on-tip-in-sometimes-wot/107112
**Category:** SON240sx Automotive
**Created:** [June 25, 2007, 2:02pm UTC](https://forums.speedlife.net/t/sr-swap-breaks-up-on-tip-in-sometimes-wot/107112 "2007-06-25T14:02:53Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)
#### Post date: [September 10, 2007, 2:00pm UTC](https://forums.speedlife.net/t/sr-swap-breaks-up-on-tip-in-sometimes-wot/107112/9 "2007-09-10T14:00:06Z")

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> [@Amazing ventriloquist...](https://forums.speedlife.net/t/amazing-ventriloquist/14011/3):
>
> bump this up. Car just came back from paint, so now i need to get it running.
> 
> Here are the symptoms:
> 
> car starts and idles fairly well.  
> however, if i try and rev it in neutral it falls on its face. it starts to rev, then it sounds like it just cuts out.
> 
> [16:46] christian: but once it hits about 3500 ROM  
> [16:46] christian: RPM

If it cuts out @ 3500rpm then the MAFS is toast… try swapping it out with another (SOHC KA MAF) and see if the problem goes away.

You can also check the ECU and see if its spitting out any codes because if the MAFS is indeed faulty then it should be spitting out a code 12 (air flow meter)

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