Cold backfire & No power
 

I have a daily drive minor moded GT that's backfiring when you first accelerate with any power on a cold engine and was pinging. Now once it's warmed up, it surges during acceleration to a point and then just acts like a few cyclinders shut down and there's really no more power. It has a new Comp Cams timing chain in it, new cap and rotor and wires. I've adjust the timing and things get a little better or worse but still the same problem. The ignition module went bad last year so it's new and the coil was changed at the same time. Any ideas? This 5.0 is accelerating like a 1.0.

Re: Cold backfire & No power
 

I'd start by checking for vaccum leaks, check your TPS voltage and clean your MAF.

Re: Cold backfire & No power
 

clean the pin connectors, also check your headers for leaks around the gasket's.
my car will give a pop every now and then only when it's cold, but warms up fast and has plenty of power though, might check intake bolts make sure their tight.
seems egr's can surge idles as well.

Re: Cold backfire & No power
 

Problem solved. MAF sensor was bad. Thanks for all the help.