Car knocks in open loop

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09-18-2005, 09:53 PM

Jarrod Sinn

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Join Date: Aug 2002

Location: Lexington, SC, USA

Posts: 11

Car knocks in open loop

My car (1995 Z 28) runs great in closed loop, but in open loop it starts knocking severely if you give it too much gas. This occurs in all six gears. Any help would be appreciated.

09-18-2005, 10:43 PM

shoebox

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Join Date: Dec 1969

Location: Little Rock, AR

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Re: Car knocks in open loop

Define "knocking" so people will know what you mean.

09-19-2005, 12:55 PM

Jarrod Sinn

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Join Date: Aug 2002

Location: Lexington, SC, USA

Posts: 11

Re: Car knocks in open loop

I am sorry, spark knock. Any load that is put on the engine, even minor will cause this.

09-19-2005, 01:17 PM

Deenasty

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Join Date: Jan 2004

Location: San Francisco

Posts: 1,322

Re: Car knocks in open loop

how are you determining this? Do you have any scanner software (i.e freescan, datamaster)? If you do, log the car, and send me the file to Deenasty83@comcast.net I will take a look, and see if I see anything...Thanks..Also please mention in the e-mail what mods have been done to the car..