# redtop running rough (resolved)

**URL:** <https://forums.speedlife.net/t/redtop-running-rough-resolved/95736>\
**Category:** SON240sx Automotive\
**Created:** [May 9, 2006, 8:44am UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736 "2006-05-09T08:44:33Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![modded](https://avatars.discourse-cdn.com/v4/letter/m/43a26b/32.png) [@modded](https://forums.speedlife.net/u/modded)\
**Post date:** [May 9, 2006, 8:44am UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736/1 "2006-05-09T08:44:33Z")

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I just did the swap… Car starts nice. When revving between 3500-4000 rpms it runs like shit sputtering. then it stalls when we let off.

ecu code 55 on ecu…

pulled a test on maf… Plug and unplug… Seems to run the same but with it unpluged u get a code and it doesn’t run pass 2500rpms. with it plug no codes and passes 2500

would bad maf do this??

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**Author:** ![Habib\_Albi](https://avatars.discourse-cdn.com/v4/letter/h/ed8c4c/32.png) [@Habib\_Albi](https://forums.speedlife.net/u/Habib_Albi)\
**Post date:** [May 9, 2006, 3:48pm UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736/2 "2006-05-09T15:48:19Z")

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no has nothing to do with it . when i did my swap my car ran like shit for about 15 minutes the ecu had to relearn because i got it tuned. that could be it let it run for a while at idle and see what happens

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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:** [May 9, 2006, 4:28pm UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736/3 "2006-05-09T16:28:04Z")

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> [@modded](#):
>
> I just did the swap… Car starts nice. When revving between 3500-4000 rpms it runs like shit sputtering. then it stalls when we let off.
> 
> ecu code 55 on ecu…
> 
> pulled a test on maf… Plug and unplug… Seems to run the same but with it unpluged u get a code and it doesn’t run pass 2500rpms. with it plug no codes and passes 2500
> 
> would bad maf do this??

(Incase you dont know)

Code 55 = Other Malfunction. (CONSULT Terminal Required)

If it runs like crap “sputters then dies” I’d be leaning towards Timing myself…

How does it run from idle - 3500 or past 4000rpm ? (is the problem only between 3500-4000) then does it go away ?

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**Author:** ![\_M\_aurice](https://avatars.discourse-cdn.com/v4/letter/_/c5a1d2/32.png) [@\_M\_aurice](https://forums.speedlife.net/u/_M_aurice)\
**Post date:** [May 9, 2006, 7:10pm UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736/4 "2006-05-09T19:10:05Z")

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Boost leak? The turbo is spooling by then, neh?

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**Author:** ![modded](https://avatars.discourse-cdn.com/v4/letter/m/43a26b/32.png) [@modded](https://forums.speedlife.net/u/modded)\
**Post date:** [May 10, 2006, 11:04am UTC](https://forums.speedlife.net/t/redtop-running-rough-resolved/95736/5 "2006-05-10T11:04:48Z")

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fixed problem… bad maf… voltage not consistant on old one