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Stalls when slow down, rides rough

Tiny
RAIDAKAOZ
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 112,000 MILES
The car rides rough, it stalls when driving slow, misfires, when starting you have to gas it even though it is fuel injected. Tried changing the Mass airflow Sensor, it got worse so put the old one back on, cleaned the EGR valve, changed the plugs and wires, fuel filter. Also the gas seems to be going down really fast. Im pretty sure it is a sensor am just not sure which one it would be and they all cost so much that is kinda hard to just go and start buying them all till the problem is solved. So any help would be very appreciated.


thank You
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Sunday, July 25th, 2010 AT 8:40 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Have car scanned at local parts store.
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Monday, July 26th, 2010 AT 8:40 AM
Tiny
RAIDAKAOZ
  • MEMBER
  • 1 POST
Did that and they told me a few things can be wrong. But I found the problem and fixed it, it wasn't on the ;ist of potential problems. The problem was fuel pressure regulator was bad. This displays similar problems to the mass airflow sensor with added black smoke from the tailpipe and eats the gas up. So I we put in a new fuel pressure regulator and it is running pretty now.

Thanks for your help.
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+1
Tuesday, July 27th, 2010 AT 4:47 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Glad to hear it.
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Wednesday, July 28th, 2010 AT 8:16 AM

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