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One piston is Weak

Posted: Mon Jul 02, 2012 10:11 pm
by PowderJZX
Hey guys

One of my cylinder is weak! chances are its the compression but then again, there is spark but there's no smoke so it can't be it. I changed the leads, spark plugs, and cap and dist rotors and still nothing (made it an upgrade tho lol).. I'll have it compression tested if i couldn't find it. but my guess is, its the injectors.. well one of them. i put a new sparks in and took #2 out (the weak one) tried smelling it and there's no gasoline smell to it!.. I took it off the road for 2 months and now that i am driving it again, it just started happening. I'll swap injector 2 with injector 1 and see if it changes to #1 piston. and if its not, worst case is the bulb inside..might be corrodade. anyone know what the problem is?

Re: One piston is Weak

Posted: Fri Nov 09, 2012 4:36 am
by Dwight
You should change the all piston from your car because one is repair and other are genuine and this is totally bad effect will at your car.

Re: One piston is Weak

Posted: Mon Nov 12, 2012 12:13 pm
by lofreq
Dwight wrote:You should change the all piston from your car because one is repair and other are genuine and this is totally bad effect will at your car.
Dwight do you recommend forged pistons or cast?

Re: One piston is Weak

Posted: Mon Jan 28, 2013 8:43 pm
by lolyf
How do you know the compression is weak if you've not tested it yet? If you suspect the injectors run the motor and listen with a meatillic rod, you can hear it ticking.