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Unusual Idle

Tiny
BROKENARROW1000
  • MEMBER
  • 1995 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 163,000 MILES
I have a 1995 Chevy k1500 with a 5.7L v8 that idles rough and chokes out when above 55-60 mph. As well as delayed acceleration and choking when coming to a stop. Replaced MAP sensor and fuel filter. Tested TPS, IAC and cleaned throttle body. All of that helped but still having issue and looking to the crankshaft sensor next?
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Sunday, April 10th, 2016 AT 1:47 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan it don't guess on parts. These tbi units loved to blow the gasket under tbi unit. Spray with choke cleaner if that is problem rpm will change. Also check other hoses and for soft hoses especially to map sensor as they suck together and don't let vacuum pass. You can also check fuel pressure but you will need an adapter for it. Auto parts rent gauge
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Sunday, April 10th, 2016 AT 3:41 PM

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