2000 Ford Ranger stalling and idling rough

Tiny
WHEELCHAIRDUDE49
  • MEMBER
  • 2000 FORD RANGER
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 65 MILES
When cold it stalls, loss of power till it warms up. Then runs fine.
no codes or pending codes. STFT is 21.0 and LTFT is at 3.1. Cant find a vacumm leak
anywhere. Any ideas? New maf, iac, tps, plugs and wires
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have the same problem?
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Sunday, November 24th, 2013 AT 9:45 PM

27 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Without a code, it becomes a guessing game. Since the problem is when it is cold, I have to question the temp sender. If it doesn't recognize that it is cold, it may not be running the fuel mixture rich enough.

When it is cold, does it have a miss or anything? Have you checked fuel pump pressure when it is cold?
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Monday, November 25th, 2013 AT 6:13 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
No miss when cold. Loss of power, Stalling.
Fuel pressure is 68 lbs. I did change the ect sensor this summer. Bought one from Auto zone 15.99. Could be a junk part. Thanks
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Monday, November 25th, 2013 AT 7:55 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Yes, it could. Have you checked it?
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Monday, November 25th, 2013 AT 8:06 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
I went out a purchased a new motorcraft ect sensor today. Will know
more after I let it sit till it cools off. Erased the KAM also. Will do the idle relearn later today.

Motorcraft was 11.60 compared to the A/Zone value craft for 15.99
Should have bought the motorcraft in the beginning
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Monday, November 25th, 2013 AT 12:03 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Well it wasn't the ect sensor. No change in the way it runs when it's cold.
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Monday, November 25th, 2013 AT 4:43 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Was it something I said?
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Tuesday, November 26th, 2013 AT 5:05 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi:
My god, no. You said nothing wrong. I have just been swamped. Sorry for the delay. Can you tell me how many miles are on the vehicle? It says 65 on the post.
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Tuesday, November 26th, 2013 AT 5:17 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
65,000 actual miles
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Tuesday, November 26th, 2013 AT 9:05 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
I bought it in 02 with 32.000 on it
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Tuesday, November 26th, 2013 AT 9:07 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Okay. I was thinking there could be a compression issue. Have you checked that?
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Wednesday, November 27th, 2013 AT 6:14 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Yes I have no issues with compression
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Wednesday, November 27th, 2013 AT 1:01 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Yes I have, compression is mormal
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Wednesday, November 27th, 2013 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Everything we reviewed seems normal. This is a tough one. I am going to discuss it with another tech and get their input to see if we can come up with more ideas.
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Wednesday, November 27th, 2013 AT 4:38 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Ok great
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Friday, November 29th, 2013 AT 4:43 PM
Tiny
HMAC300
  • EXPERT
This has been handed to me to help. F'rom your first description I would think along the line of a vacuum leak because when it warms up the computer is richening the mix enough to take it over so it won't run rough. Or maybe a dirty egr valve/plugged passage. This could also be a broken grommet on valve cover or something similar to that or a hole int eh maf to throttle body duct work. It can be as little as a small hole in vacuum line or cracked line. Try plugging the two lines I've pointed out one at a time while cold and see if that helps if it does then the line will have to checked for a small hole/crack.
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Saturday, November 30th, 2013 AT 12:51 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Ok Thanks I will check the 2 hoses tomorrow. I did
buy a new egr that I haven't put on yet. Will install and check passages also. Tubing from maf to throttle body is fine no holes. Checked it several times.
Hope I find where the problem is.
Thanks, will let you know
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Saturday, November 30th, 2013 AT 2:26 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Now is it the top hose or bottom on the evr?
Cant tell by the picture.
Thanks
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Saturday, November 30th, 2013 AT 4:31 PM
Tiny
HMAC300
  • EXPERT
Looks like the bottom but you could unplug both and see if it makes a difference as well then you know it would bean ever or cco problem.
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Sunday, December 1st, 2013 AT 5:48 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Well today we changed the egr valve and tube Did find
that one of the bolts holding the egr valve was only tightened
half way. Changed dpfe hoses( figured it wouldn't hurt) and
the hose going from the intake to the evap service port.
Hose was looking bad but don't think it was leaking.
Let the truck cool off outside (15 F) for 2 1/2 hours. Truck
Started and didn't stumble or starve for fuel.
Will know more tomorrow after letting it sit overnight.
I will let you know this week.
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Sunday, December 8th, 2013 AT 6:26 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Started it today. Normal throttle response. New egr did help
when engine was cold. I can take right off in it. Still have a stumble at idle and stall.
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Monday, December 9th, 2013 AT 11:48 AM

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