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Can't boost ... wtf?

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Old Dec 3, 2008 | 12:51 AM
  #1  
hurleysurf24's Avatar
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wtf rotary wtf
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From: Who knows
Can't boost ... wtf?

Finally got my car back, and I'm 80% sure the TPS is shot (as is the guy that built my car) however I want to confirm my thoughts with your opinions before I splurge and drop another 250 bucks I don't have.

This is on a fresh rebuild with new injectors, afm, and plugs.

Issues are as follows:
- Car runs fine under full/partial throttle as long as I run in vacuum. Once I go into positive vacuum/boost it runs too choppy and doesnt accelerate (seems like its flooding)
- Car idles at 1500, but there is a pretty massive streetport on the engine. However sometimes you'll hear the brppp-brppp-brpppp sound from the exhaust followed by a prolonged brppppppppppppppppp sound. Hmmmmm
- Car is getting around 6 MPG.

Temps and pressure look fine on the car.
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Old Dec 3, 2008 | 01:08 AM
  #2  
BOOSTscoop's Avatar
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From: Somich
break in mode??...
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Old Dec 3, 2008 | 03:32 AM
  #3  
proz07's Avatar
looking for 82-83 corolla
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From: ar
have you tested the TPS or adjusted it? or are you just shotgunning the problem till its fixed?

z
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Old Dec 3, 2008 | 08:55 AM
  #4  
hurleysurf24's Avatar
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wtf rotary wtf
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the latter. i dont really have time to test and tune since i work a million hours a week.
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Old Dec 3, 2008 | 09:22 AM
  #5  
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Is it back firing when you get into boost? Sounds like limp mode to me. See what codes if any the car is throwing and start from there.
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