Question about Infiniti Q45

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Car shakes a little when taking off had fuel system cleaned injectors etc, some one said I could have a cylinder down but when I accelerate over 2500 rpm it goes away below minor shake at low speeds, also smell fuel when a/c is on was wondering if it could be injectors the car is a 1991 infinity q45, 188000 miles on it all belts and fluids have just been changed couldn't do the plugs said it takes 5.5 hours of labor can someone tell me common issues or if this sounds like a cylinder is down or if I just need plugs wires and injector rings, and I have the manual is it that hard to do myself?

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Sounds like a spark plug misfiring or not firing especially if you are smelling gas. One of the cylinders not firing would cause the gas not to ignite and thus not burn. You definitely want to check them if not just replace them. Too bad it is so time consuming to switch them out.


Posted on Jul 14, 2009


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