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I have a 1993 Pontiac benneville ssei. It starts runs fine, after it warms up it will pop am stutter at highway speeds when I kick the gas down to pass. I have replaced the fuel pump and it still does this. No check engine light comes on. Could it be an ignition coil?

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  • 248 Answers

Work your way through spark plugs, ignition coil, fuel injectors. If all these look fine then it is likely electrical. When you check the spark plugs if they are blackened then this also points towards fuel injectors also.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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  • 625 Answers

SOURCE: 91 nissan Sentra losses power at highway speeds

remove the front 02sensor and drive the car like that, remove means complety take it apart from exaust, if problem goes away or gets so much better then your catalitic converter at the exaust is restricted and need a new one

Posted on Jun 19, 2008

  • 4 Answers

SOURCE: 2000 Alero hard to start

I had this problem with my 1999 alero i took it apart and investigated it myself because i have been a mechanic for 25 years now but i had to replace the starter relay the whole ignition system and believe it or not new valves. After I replaced all of those my alero drove better then eer and the lights never went back on or any of the other lights....

Posted on Jan 07, 2009

  • 141 Answers

SOURCE: Engine runs rough after about ten minutes /idles really low

Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.

Posted on Jan 17, 2009

alicantecoli
  • 22156 Answers

SOURCE: 1980 VW rabbit, manual/fuel injection: I am

it starts from cold because the auto choke is on ,allowing a richer mixture ,try removing the sender unit in the tank and seeing if the connection from the pump to the outlet connection is ok or leaking causing a loss of fuel pressure

Posted on Aug 02, 2009

  • 55 Answers

SOURCE: '98 S10 4 cyl. 5 speed: Sudden high idle, now surges.

Go to your local shucks or auto zone and they can check any codes behind your check engine light and it's free. It sounds like one of two things a O2 sensor or your mass airflow sensor but they will tell you for sure

Posted on Oct 02, 2009

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