I have a 2004 impala. My problem is car will start and run great for about 15 - 20 minutes then if i stop to turn it starts spitting and sputtering and tach starts bouncing all over.
Sounds like your problem is air. Although the erratic tach could be indicative of the throttle positioning sensor being faulty.
Yet before replacing this, I know that if you pull in a shop or open the hood for one too many backyard mechanics, they will eventually have you replacing the mass air flow sensor and the air intake temperature sensor and while they may very possibly be the actual culprit and even need replaced, I have found that 9 times out of 10, the air intake just needs to be cleaned. Look for air filter, trace the big hose back to engine <there it is>.
This is something you can do yourself or even have a small child handle it rather than a shop. I highly suggest doing this yourself at home so you know it has been done.
You'll need a screwdriver (or small socket/wrench - most are screws). and a few baby wipes.
*unfasten your air intake hose at the <Air Intake> on the Motor.
*Simply wipe out the inside of the throttle body as completely as possible and for as far in as you can reach. (I use baby wipes, but they are readily available and work great). Wiping out this intake will remove any sticky varnish or gummed up surfaces, Make sure to pay attention to the edges on both sides of that butterfly gate at the throat of it. (the gate or shutter door usually have a build up of residue which when it gets hot - heats the residue enough to reach melting point and they drip, then when you slow down and stop they are not fluttering and opened wide, but usually they are almost closed. So while waiting at a light for example, the residue between the body and the gate causes them to stick shut.
I also suggest wiping out the inside of the hose before connecting it back to the intake.
Good Luck and Happy Motoring .
Jun 22, 2017 |
Cars & Trucks