Need some Help

[petethehack]

Hi All,

I just bought my first Ranger and I have a question. My check engine light came on and 2 codes came up. 1st was a bad CPS (or bad CPS connection) 2nd was EGR had restricted flow. The truck purrs like an old Tom Cat with only 115,000 miles and I am assuming with a faulty CPS it shouldn't be running at all. The only odd thing about the way it runs is that when I start it (hot or cold) the RPM's jump to 1500 and VERY slowly drop to a nice 700-800 idle. Sometimes it will fluctuate a little as it is slowly dropping. When I pop the hood and have someone rev the throttle I can hear a very noticable and loud sucking noise, just like a carbureted engine when you remove the air cleaner, coming from the back of the engine. Could all this trouble be from a vacuum line leak or a leak from the intake? Any suggestions would be appreciated, cuz I am stumped.

1995 Ranger XLT standard cab 4x4, 4.0 Auto. Bone stock, except for the dents.

 

[wildbill23c]

Not exactly sure on the newer electronic engines, but sounds like you have a vacuum leak somewhere which could very well cause your check engine light problem. The EGR sounds like it either needs cleaned or replaced, usually its just best to replace them.

 

[TwoTon]

Hey I have a 96 4.0 doing the same thing, except the CPS code. The motor has a very worn-out growl to it like its struggling to climb RPMs. But it still has tons of power/life. Im getting the EGR restricted flow code as well, and think it has something to do with it. I recently overheated my engine (a couple times and once very bad) and I noticed it during and after the bad one (the growling noise). All vacuum lines are properly hooked up to my EGR system. I even have the Idle issue. My EGR system however is newer and takes two flow readings being a 96 DPFE I am unaware of the year they implemented this... Planning on changing valve and cleaning MAF... I'll post results... If you find a "cure" please share it as well because it seems we are in the same boat