For 1st Few Months after My EJ25 Conversion back in 2009 I ran it without a VSS

& got those Same Symptoms,,, The HiwaySpeed ShutDown & Restart is the ECU trying

to make sure that You are aware that You have an issue that needs to be addressed &

on Mine it would allow about 13Mi’s before Repeat > It’s Limp Home Mode ~

  

> On 18 Oct , 2022, at 10:23 AM, John Rodgers <jrodgers113@GMAIL.COM> wrote:
> 
> Sorry, guys. This message got chopped. Now trying again.
> 
> At 65 to 70 MPH my 2005 2.5 engine starts stumbling. Slow down, and it
> settles back down so I'm limited to 60 mph or less. My mobile car scanner
> says it's the VSS. I tend to agree since I found excess movement in the
> final drive axles coming out of the transaxle. I can get that fixed since
> I'm pretty sure the VSS is picking up a bad signal as the shaft wobbles at
> high speed since the magnetic signal comes from the CV bolt heads.
> 
> The other thing seems to occur at any normal highway speed but random in
> its occurrence. Cruising, the engine just suddenly quits cold - no warning
> at all. Just like the ignition switch has been turned off. I have found
> that if I instantly take my foot off the gas pedal and immediately apply
> pressure again it runs just like nothing happened =- until 15 miles up the
> road it happens again.
> 
> Has anyone any suggestions as to what might be going on?