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1990 Pontiac Firebird V6 3.1 is having a hard time starting; especially when hot. Backstory: the car came to me with a horrible stall. I replaced spark plugs, wires, injectors and fixed the temp gauge(was pegged). Fixing the temp gauge eliminated the problem completely. So I moved on to fixing my Swiss cheese exhaust. Upon replacement of the exhaust, the car makes a "whining" sound when starting, and sometimes it just stutters and dies (happens at least once if it is hot first.). If I give it gas continually when it starts rough, it will limp along until it turns off. The fan behind the radiator is operational. It kicks on at 210-215 degrees. The coolant is leaky, from above the water pump, but it is full. The fuel pump is functioning normally. What do I do? I've heard of the TPS sensor or MAF sensor being trouble, or maybe a second temp sensor (but I have no idea where it is and saying I'm a novice mechanic would be a flattery).

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Posted on Jan 02, 2017

ourhowse
  • 2007 Answers

SOURCE: car idles rough and stalls

Have you ever changed the fuel filter? If it's not that, and it's not a vacuum leak, it is probably your idle air control valve.

Posted on May 08, 2009

  • 2 Answers

SOURCE: Rough start, sometimes doesn't.

hi i have a problem with a VW POLO (6N1) -95 mod, that will not idle .. have cleaned carburetor .. Exchanges: 1 advantages accessories -2. Lambda - 3.trykkregulator - 4 plugs with wires .. But alikevl it sounds as if Bliler stock popcorn .. speed is at ca.550,-car use normal fuel and traction is normal .. is there anyone who can answer this it would have host terrific

Posted on Jul 12, 2013

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