Time to get an easy out kit...Errrr.

[Ldub]

A few random thoughts...

If it were the timing belt, it wouldn't run right at any rpm.

You don't need a new coil pack to play "musical chairs", though the random misfire code isn't pointing to a specific coil pack, which makes it hard to know which one to switch first. (to see if the misfire code moves with it after resetting the ecu)

Any unmetered air getting into the system via leaks in any vacuum controlled system will wreak havoc & throw "codes-a-plenty"...

As a last, or maybe first resort, try to find a VX Bro or Sis who is sympathetic to your problem, & switch ECU's, to see if that's the culprit...

[Y33TREKker]

Fuel pressure regulator? Very common VX ailment it seems, and a faulty one would be causing the symptoms you've described.

[Ebenezr]

Fuel pressure regulator? Very common VX ailment it seems, and a faulty one would be causing the symptoms you've described.

I did check the fuel pressure as mentioned above. It was 38 with key on and 32-34 with the engine on. I'm thinking now that may be low. Does anyone know what it should be. I can't seem to dig up this info.

[Y33TREKker]

I did check the fuel pressure as mentioned above. It was 38 with key on and 32-34 with the engine on. I'm thinking now that may be low. Does anyone know what it should be. I can't seem to dig up this info.

Is it possible it was just checked during one of those "good" moments though?

And the downloadable manual suggests that "Key On" fuel pressure should be between 333-376 kpa (48-55 psi).

If the problem is intermittent like you described, who knows if even the comparably low pressures you read remain constant under actual load/driving conditions.

[Ebenezr]

Is it possible it was just checked during one of those "good" moments though?

And the downloadable manual suggests that "Key On" fuel pressure should be between 333-376 kpa (48-55 psi).

If the problem is intermittent like you described, who knows if even the comparably low pressures you read remain constant under actual load/driving conditions.

Hmm. I am curiious where you found that in the manual.? I couldn't find it. Thinkin then I should go for FPR replacement.

[Y33TREKker]

Hmm. I am curiious where you found that in the manual.? I couldn't find it. Thinkin then I should go for FPR replacement.

My initial search term was "fuel pressure", and when following one of the "fuel pressure regulator" search results, I saw a link that said "fuel system diagnosis". After that I used "fuel system diagnosis" as my search term, and the fuel pressure readings were listed under a few different topics.

Most of the results were in section 6E - Engine\ 6VE1 3.5L Engine Driveability and Emissions.

[Ebenezr]

My initial search term was "fuel pressure", and when following one of the "fuel pressure regulator" search results, I saw a link that said "fuel system diagnosis". After that I used "fuel system diagnosis" as my search term, and the fuel pressure readings were listed under a few different topics.

Most of the results were in section 6E - Engine\ 6VE1 3.5L Engine Driveability and Emissions.

Thanks. I bumped into similar info googling it.

[tom4bren]

If it were the timing belt, it wouldn't run right at any rpm.

Right but would show up more to the Butt Dyno during acceleration rather than RPM related. Remember the timing lag on the old MOPAR engines???