2001 MUSTANG V6 SPUTTERS WHEN ACCELERATING

Hi,
Please don’t throw any more money at it, it’ll only confuse the issue.
When a part is proven bad by troubleshooting, then replace it.
A Shop manual is a good investment, useful.
Whether the CEL light is on or not, there still may be codes. Have a Scan-tool? If not, most chain parts stores will scan your car for free.
Did this begin after something was done to the car, or start suddenly, over a time period?
There are a few issues that don’t always trigger a CEL, 02’s, CPS, Crank position sensor, for instance.
A decent Scantool will pickup things quickly if you know what you’re looking for, 02 sensor correction, fuel trim, if you can borrow one that allows drive cycle looking, live data streaming, it may be quite beneficial.
Buy a can of CRC MAF cleaner & with a few, no contact blasts, clean the MAF. You’ll never be able to tell if it’s dirty by viewing.
Run a Cool air intake? Check for vacuum leaks in it’s clamp point connections on it or the stock setup, unmetered air from any vacuum leak needs to be addressed. Check all your vacuum lines, any loose, dryrotted lines- replace.
Check your Grounds, Battery to Block, Block to chassis, battery to Computer. Pull them, make sure they’re solid, tighten them down.
Check all your wiring connectors, any splices that may have been made, spend a little time at this, also look at the wiring for your 02 sensors, they sometimes melt to the exhaust.
Pull your MAF sensor plug off while the motor’s running, if it doesn’t run absolutely awful or stall, that’s the direction you should be looking.
Did you set your TPS to <1 DCV at idle?
CEL flash repeatedly when attempting to accelerate hard?
Does it run the same engine cold or warm?
Does the car idle rough, miss when driving slowly, or is is specifically when you hit the throttle near or > half pedal?
Filled up at a new gas station recently, or car sit for an extended period?
Use electrical conductivity grease on the new plug wire ends? Make 100% certain they are terminated correctly, securely.
The Coil pack has issues with the connectors being corroded, make certain all the plug pins are clean, spray CRC electric or MAF cleaner, use electrical grease to keep out moisture & improve connections.
Good luck!
-John

Did you try replacing throttle body sensor?

• #1

My '01 v6 is giving me problems. Idles rough when it is cold. After 20 30 minutes driving it will start sputtering rmps go up and down dies after that. I have to stop somewhere for 30 minutes to an hour let it cool down. When it starts sputtering I will try to get the RPM's up but the engine won't rev and it bogs and dies again, especially if I try to drive it bogs and dies again. The fuel pump was doing 40psi alredy replaced it. I also replaced iac valve, egr valve, egr sensor, sparks plugs, and wires. Still does the same. Im thinking replacing the coil pack.

Any suggestions?