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|Replace spark plug wires (Old one were original so 20 years old)|
|Spark Plugs (OEM plugs from dealer and when I replaced them I found the ones in the truck were new but I replaced them anyway)|
|Replace Coil Pack (This made a big difference in power) It had 4 cracks in it which 3 were on the bottom|
|Replace Cam Phaser (This got rid of the squeak that sounded like a belt)|
|New Oil Pressure switch (Dealer recommended this to fix crazy oil pressure readings)|
|Fuel system cleaner (2 cans) (contained PEA)|
|Replace PCV valve (this made a huge difference and was hoping was the smoking gun. The 90 deg hose that goes to this was completely collapsed so I replaced it as well.|
|engine fuel injector/throttle body cleaner service (My mechanic did this and made a pretty big difference)|
|Replace Air cleaner filter|
Ron:All shown data looks fine
EVAP codes won't effect engine performance, worst case would be slightly higher idle from vacuum leak between EVAP Solenoid and engine's vacuum port for that solenoid
@Blitz Do you have FORScan? I would like to know if you too have a low misfire count.
I do have an update. I put a vacuum gauge on the intake and its running at 15Hg on idle but the needle is smooth. I stick the vacuum gauge on my Dads ranger and it idles at 20Hg and smooth. I know little about low vacuum troubleshooting but is this truck is out of time? It only has 85,000 miles so I am guessing the engine is not wore out? Any help on this one?
MAF sensor was fine. My check engine light is still lighting up every couple weeks for small evap leak.Just an update on whoever is interested. I replaced the Vapor canister purge valve and found what was causing it to stick open. The vent hose feeding it was in bad shape. Ford does not make this hose anymore so I got one from a pull and pay. So far its has been a couple weeks and no check engine light yet. I read in other forums that if your A/C system is low on Freon it will cause a rough idle so I had my mechanic check my system and was pretty low (- 1.0lb) it does idle a little better and I would almost say pretty good. Next thing I am going to do is clean the MAF sensor and intake temperature sensor. Looking back that should of been one of the first things I should of done. I will let you know.
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OK I see some people are interested in this so here is the latest update. Since this is my daily driver and I had the bed off I tried to patch this hole with RTV. It worked for first few week but when my Ranger sat at airport for 2 weeks the light came back on as soon as I hit the highway on way home. I bought a new filler neck and hose from Rock Auto and will install it as soon as I get a break from work. This is only to fix the check engine light not the stumble in the idle which is still there. As far as the stumble goes my next task is to get my fuel injectors cleaned and rebuilt. I will let you know if this helps anything.