random sputter?
Thread Starter
TECH Enthusiast
Joined: Sep 2008
Posts: 636
Likes: 0
From: Cheshire, CT
random sputter? so sometimes while im just coasting foot off the gas the car will sputter a little, rpms will drop a bit then go back up to normal, almost like it wants to stall, no cel on...yet, any possible ideas?
A number of areas of contributing causes present themselves: secondary ignition, fueling, vacuum leak, exhaust leak... You can start anywhere but an easy thing to eliminate in your list of suspects is to duplicate the problem while having a fuel pressure gauge taped to the windshield. There is a schrader valve on the fuel rail and you can get a gauge at Autozone for about $30.00 if you don't have one already. Watch for brief pressure drop that shouldn't be there. If/when you eliminate fueling (could be as simple as a dirty fuel filter), move on to other areas. Plenty of info here on tracking down vacuum & exhaust leaks as well as ignition troubleshooting. Maybe do a quick check of where your TPS voltage is at closed throttle as well. Best of luck; let us know how it goes.
