2001 Ford Ranger Loping at Idle

Tiny
CAMPERMAMA
  • MEMBER
  • 2001 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 85,000 MILES
Hi, my truck just started doing this. It runs fine but when at idle (like at a light or just stopped) it lopes. The check engine light is on and it is sucking gas like crazy.
I am buying a scan tool to day to get the codes. But an wondering what you think about this. Thanks!
Stacey
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Sunday, September 14th, 2008 AT 11:01 AM

6 Replies

Tiny
BLACKOP555
  • EXPERT
Really would not like to jump to conclusions till the codes are scanned.

But if I was to guess I would be thinking o2 sensor code.
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Sunday, September 14th, 2008 AT 4:08 PM
Tiny
CAMPERMAMA
  • MEMBER
I got a scan tool but it won't work on the ranger! No codes no messages nothing! I tried it on an older car and it worked fine. Any ideas?
I am going crazy, I need to fix this truck and now I can't even get the codes.
Thanks for your help!

Stacey
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Sunday, September 14th, 2008 AT 7:25 PM
Tiny
CAMPERMAMA
  • MEMBER
Ok found out the scanner wouldn't work because of a blown fuse!
These are the codes I got.

P0102 - MAF or VAF A circuit low input
P0171 - Systen too lean (bank 1)
P0174 - System too lean (bank 2)
P0300 - Random/multiple cylinder misfire detected (I don't believe thia one).
P1504 - Idle air control circuit

Like I said it runs fine just burning gas like crazy and lopes at idle.
Any ideas?
Thanks!
Stacey (single mom trying to help daughter out)
I was going to try cleaning the MAF and IAC today, do yu think this will help?
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Sunday, September 14th, 2008 AT 10:27 PM
Tiny
BLACKOP555
  • EXPERT
Deffintely recommend cleaning the maf sensor see if you can clear up that code, the maf sensor can cause the o2 sensors codes and the missfire code to be thrown.

Low input means its not sending as high a signal indicating too little air coming in which is likely a missread from a dirty sensor, when in actuallity it is getting too much air messing up the other codes.

Clean the iac see if that helps the bad idle, could be the maf sensor, on hook it, does it idle better?
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Tuesday, September 16th, 2008 AT 7:45 PM
Tiny
CAMPERMAMA
  • MEMBER
So it turned out to be a bad MAF, I replaced it, then I drove the truck. Check engine light came back on. Replacing the MAF cleared 4 out of 5 codes. The one code I have now is P0300, misfire.

The idle is rough and does feel like a misfire. Going to check the plugs today. If not the plugs what would your second guess be?

I have lost 4 lbs fretting over this for 5 days now. Thanks for your help!

Stacey
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Wednesday, September 17th, 2008 AT 10:24 AM
Tiny
BLACKOP555
  • EXPERT
Check the ignition coil also. Could be causing that problem.

Try unhooking various sensors and running it to see if you can cure the missfire.
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Wednesday, September 17th, 2008 AT 3:43 PM

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