What's the problem?

[joshwfl]

My 2000 GT was running decent, but stumbling occasionally so I replaced the plugs, a couple coil boots, fuel filter, and cam sensor (due to a code). It ran amazing right after, then upon the next start up has no power. It doesn't stall, but the rpms go from 1000 to about 400 back and forth idling. I had the alternator tested and it passed but with excessive ripple. The engine runs smooth, but is lacking power. No misfire or bucking, just feels like v6 power. I've also noticed the exhuast is not as loud. Should I be cleaning the MAF, replacing the alternator, or is it possibly something else?

 

[wmburns]

Let me get this straight. The alternator is confirmed to have excessive ripple?

YES, replace the alternator! Excessive ripple will cause all sorts of problems including idle, power, ect.

Today's cars simplely will not run right without a solid alternator and battery.

After the alternator is confirmed good, re-post the current results.

Never hurts to clean the MAF.

 

[joshwfl]

Yep, the printout said excessive ripple, but it also said passed. I'll order a new one tomorrow and hopefully all will be well. Thanks!

 

[joshwfl]

That was great, never had an alternator that easy to change before. Problem solved!