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77 280Z Losing Pressure When Pressing Throttle


REAP_

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Okay thanks for the help everyone. I ended up opening up the AFM and seeing if the previous owner had tampered with it at all and of course he had. The AFM was set for a rich fuel mixture. I ended up fixing that and the car is Running better. As for the problem with cylinders 3 and 6 yes the spark plugs do have combustion deposit and raw fuel on them. Also I did put new fuel into the car instead of running what was in there.

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I'd go ahead and replace the plug wires as a first step.  Bad wires can give you a weak spark and misfiring/stumbling under load.  If that doesn't clear the problem up, then consider your injectors.  I've had very good luck cleaning fuel varnish with Chemtool B12.

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I keep an "emergency box" of stuff, such as a set of new, premium sparkplug wires, cap & rotor, spark plugs, coil, etc. I didn't get it all at once, but bought things with the spare cash. I only use it temporarily to diagnose a problem, or for emergencies, so most of it has only been used for a few minutes.

Edited by TomoHawk
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