Idle Problems!
#1
Idle Problems!
Okay, I've got some problems here.
First-off, I'm driving a 2002 FX4 w/Manual Trans. Now to the unknown problem.
Sometimes when driving, and say the light turns red ahead, I'll push in the clutch and take it out of gear, but the RPMs stay up near what I was driving at (last was at 2500-3000), until I slow down. I dont know, but assume that all Rangers do this for some reason?
Second problem is this: I was just driving to the grocery store, about to turn it, when all of a sudden I notice I have no power steering! I look down, and my Chekc Engine Light is on! Now, obviously the engine stalled, but I can only assume it went down to Idle too far. I know I didnt stall it by leaving it in gear because otherwise I would have come to a rough stop. The Radio was still on and going, so I had no idea. I have noticed this also before, but never has it stalled. The truck idles a little bit above 500RPM, and sometimes when coming to a stop, after it comes down from 3000ish RPM (as mentioned above), it will dip down below, but then bounce up. Was this just a fluke that it stalled, or what?
Right as I parked the truck at the store I opened up my glove compartment and looked at my warranty info. Figures, I'm just over by 200Miles. And I know someone is going to say something about checking my Vacuum lines, but how and where are the only questions I have.
Anyone?
First-off, I'm driving a 2002 FX4 w/Manual Trans. Now to the unknown problem.
Sometimes when driving, and say the light turns red ahead, I'll push in the clutch and take it out of gear, but the RPMs stay up near what I was driving at (last was at 2500-3000), until I slow down. I dont know, but assume that all Rangers do this for some reason?
Second problem is this: I was just driving to the grocery store, about to turn it, when all of a sudden I notice I have no power steering! I look down, and my Chekc Engine Light is on! Now, obviously the engine stalled, but I can only assume it went down to Idle too far. I know I didnt stall it by leaving it in gear because otherwise I would have come to a rough stop. The Radio was still on and going, so I had no idea. I have noticed this also before, but never has it stalled. The truck idles a little bit above 500RPM, and sometimes when coming to a stop, after it comes down from 3000ish RPM (as mentioned above), it will dip down below, but then bounce up. Was this just a fluke that it stalled, or what?
Right as I parked the truck at the store I opened up my glove compartment and looked at my warranty info. Figures, I'm just over by 200Miles. And I know someone is going to say something about checking my Vacuum lines, but how and where are the only questions I have.
Anyone?
#3
#6
For your MAFS sensor, use electrical contact cleaner that leaves NO film/residue behind. For IAC, you can use brake cleaner I believe but 99% of the time, when the IAC goes south, cleaning it gives very short term relief if any.
If your MAFS is dirty, cleaning it will help your idle a lot. Seems his IAC is taking a dump IMO. Mine is starting to act like his truck...when coming up to a stop sign or red light or making a turn w/ my foot off the gas, RPMS will dip to 300rpms on the tach gauge and the engine will almost stall out then they will jump up to about 700.
If your MAFS is dirty, cleaning it will help your idle a lot. Seems his IAC is taking a dump IMO. Mine is starting to act like his truck...when coming up to a stop sign or red light or making a turn w/ my foot off the gas, RPMS will dip to 300rpms on the tach gauge and the engine will almost stall out then they will jump up to about 700.
#9
#11
Originally Posted by Morph
Sometimes when driving, and say the light turns red ahead, I'll push in the clutch and take it out of gear, but the RPMs stay up near what I was driving at (last was at 2500-3000), until I slow down.
By far, the most common cause for the high or low RPM problem is a sticky/dirty IAC valve, even more so if you run an oiled gauze filter like a K&N.
The Throttle Position Sensor can occasionally give a high idle problem on deceleration but it is rare. It happens because the PCM cannot sense the closed throttle position so it keeps the IAC open too far and too long.
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