Just as the title says, my engine is running rough. This problem started after I had my thermostat go bad on me. I ran the coolant temp up to 240 once and that was when I first noticed it was overheating, after that i shut it down and had some guys from work tow me in. I fixed the problem that night but noticed it was idling rough with a slight lope to it at an idle and running down the road it just doesnt sound right. I checked my LP pressure and I have 15 PSI@Idle and 10 PSI@WOT without my smarty, with the smarty set on "fuel saver" i still have the 15 PSI@Idle but my pressure drops down to 7 PSI@WOT and I checked it with a 3/8" fuel line, I also changed out both fuel filters about 4500 miles ago. I am also on my original vp44 with just over 200,000 miles.

I am just wondering where to start looking or if someone else has had this problem and corrected it. I apperciate any and all help, thanks.

 

VP-44 electronics fried? Any codes?

 

The only codes I get are when i have the smarty downloaded but as far as on the stock setting I have got nothing. But i did get a poor performance due to engine overheat code and haqs not came back since the new thermostat. I might get my injectors pop tested and do a compression test on the engine while they are out.