V10 Surges
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V10 Surges
Did a search and found nothing.
My 99 V10 surges while idling. It will surge from about 900rpm to over 1500 regularly, almost seems to be scheduled. It was doing this for a while a couple of months ago and before I got it to the shop it stopped. It was surging to over 2000rpms then.
I'd like to try ad get it fixed w/o taking it in, any suggestions?
Edit: Ha, I mastered the search function and found it! I'm thinking it is the IAC or PCV Elbow.
My 99 V10 surges while idling. It will surge from about 900rpm to over 1500 regularly, almost seems to be scheduled. It was doing this for a while a couple of months ago and before I got it to the shop it stopped. It was surging to over 2000rpms then.
I'd like to try ad get it fixed w/o taking it in, any suggestions?
Edit: Ha, I mastered the search function and found it! I'm thinking it is the IAC or PCV Elbow.
Last edited by Ziess; May 8, 2006 at 12:11 PM. Reason: Search and found it
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From: north west new jersey
surge is sometimes caused by the pcm adjusting the mixture up and down to compinsate for a lean mixture as you have found. i would start in 2 areas . 1 look for a vacume leak as you found and 2 replace the fuel filter as a cloged up one will also cause a lean mixture ,
and welcome to FTE hang around you will find many guys how can and always help out.
and welcome to FTE hang around you will find many guys how can and always help out.
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In order: Fuel filter, Air Filter, clean MAF, vacuum hose 90 degree elbow, IAC clean or replace.... actually I would do the first four then test it for the surging...if still there the IAC...if still there I would start thinking cam position sensor(CPS) or electrical grounds..the CPS is a rare item to crap out and it usually goes completly bad...but I have found one that had a piece of crud between it and the interupter that caused a lot of weird greif.
Lead Driver
Joined: Sep 2003
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From: Albuquerque
Originally Posted by Ziess
Ok, where exactly is the PCV elbow?
If changing the hose, then IMHO...I would also change the PCV itself.
Hope that helps...
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
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Well I couldn't see anything wrong with the hose or the valve. I guess next is the IAC.
Anyone care to tell me where that is located?
Also, how hard is the fuel filter to change?
Anyone care to tell me where that is located?
Also, how hard is the fuel filter to change?
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Lead Driver
Joined: Sep 2003
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From: Albuquerque
For the fuel filter take a look at this link...it should help. Not difficult at all...
https://www.ford-trucks.com/forums/s...d.php?t=487679
-->TIP: Either pull the fuel pump fuse and wait for engine to stop or remove the gas cap and let sit for 2 hrs. This releases the pressure in the fuel line.
As for the IAC...for me anyway...is to difficult to explain where it is. Would be better with a picture. Maybe someone will chime in soon...with a pic or location.
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
https://www.ford-trucks.com/forums/s...d.php?t=487679
-->TIP: Either pull the fuel pump fuse and wait for engine to stop or remove the gas cap and let sit for 2 hrs. This releases the pressure in the fuel line.
As for the IAC...for me anyway...is to difficult to explain where it is. Would be better with a picture. Maybe someone will chime in soon...with a pic or location.
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
Lead Driver
Joined: Sep 2003
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From: Albuquerque
Gallery IAC removal/install
Originally Posted by Ziess
Well I couldn't see anything wrong with the hose or the valve. I guess next is the IAC.
Anyone care to tell me where that is located?
Also, how hard is the fuel filter to change?
Anyone care to tell me where that is located?
Also, how hard is the fuel filter to change?
https://www.ford-trucks.com/user_gal...&albumid=22274
Hope this helps...
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
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From: Western New York
Had the exact same issue. Had my truck scanned and it listed the MAF, IAC or a vacuum line problem. Replaced a cracked PCV elbow and that solved my surging problem. Now my SES light has come back on and I am experiencing hard upshifts (sort of feels like a drag racing auto upshift). After having it scanned it says the MAF sensor is failing. Would this cause my hard upshifting and where would you guys recommend getting your MAF sensor from?
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Joined: Sep 2003
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From: Albuquerque
Originally Posted by Ronin007
Had the exact same issue. Had my truck scanned and it listed the MAF, IAC or a vacuum line problem. Replaced a cracked PCV elbow and that solved my surging problem. Now my SES light has come back on and I am experiencing hard upshifts (sort of feels like a drag racing auto upshift). After having it scanned it says the MAF sensor is failing. Would this cause my hard upshifting and where would you guys recommend getting your MAF sensor from?
If that does not do it...then...You could always go to the dealership, but NAPA has both NEW and Reman (core charge involved)...for reasonable pricing.
Good luck...
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
Last edited by biz4two; May 11, 2006 at 02:08 PM. Reason: mispelled word
Posting Guru
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From: Western New York
Thanks biz4two for the suggestion. I should have put in my previous post that we cleaned both the MAF and IAC when we had all that stuff off checking things out. Thanks for the heads up on the NAPA parts. Do they work as good as the Motorcraft parts? I am all for saving money, but not if I have to turn around and buy the same part two or three times.
Lead Driver
Joined: Sep 2003
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From: Albuquerque
In my own experience purchasing sensors from NAPA...they have all been a high quality product. Never have changed my MAF of IAC on my V10, but other FORD vehicles. All worked well...with no issues.
Maybe some other folks will chime in with their own experiences...
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
Maybe some other folks will chime in with their own experiences...
biz
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2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s
