× Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

2005 F-150 low volumetric efficiency test

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 13:05 #32233 by Cheryl
I’m working on a F-150 just had the engine replaced low power or atleast in my opinion. Intake air temp 112 mag g/s 178 rpm 5060. Using the otc calculator online I’m coming with 69-70%. Checked exhaust back pressure it was okay. Front o2 sensors go lean under wot. Checked and cleaned maf also replaced. Checked for intake tube restriction. Also it has a pending code of p2006 intake runner stuck closed. I’m wondering if that could possibly count as an intake restriction?? The guy who put the engine has the wiring harness tangled on the rods so he’s going to re do his work. Hopefully that has an improvement on the test I did. Any recommendations??

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 15:42 #32240 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test
You're on the right track with the IMRC. The intake runners not operating properly will definitely cause low VE. Been there, seen it.

Also, give the ATG calculator a try. You're likely to get significantly different readings from OTC.

Unfortunately, the IMRC doesn't explain the low O2's at WOT. Even with the runners stuck, the O2's should still show rich. I think you've got two problems...

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 16:52 #32242 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
He got the intake off again the wiring harness was jammed in the rubber rods. Put it back on seems better than before. Where do I find the ATG calculator vs otc calculator?? I’ll compare the two of them

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 16:54 #32243 by Tyler

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 17:21 #32244 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
So how do I read this. It’s giving me 2 readings at the end a theoretical load and estimated be.

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 17:22 #32245 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
Ve

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 17:26 #32246 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test
EST_VE is the number you want.

What did you get for VE after the intake fix? I have an '06 to compare to if needed.

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 17:56 #32249 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
74% after the fix. Could you give me the 06 to compare to if you could

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 18:03 #32250 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test
Sorry, I lied, it was an '07. Not sure it'll matter. I posted about it here:

www.scannerdanner.com/forum/diagnostic-t....html?start=34#31239

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 18:25 #32252 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
Not sure if I missed it or not but what was the fix on yours??

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 18:41 #32253 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test
Reinstalling the intake so the runner actuation rods move freely. :silly: So you fixed the intake on yours, yet the VE is still low... Are the O2's still low at WOT, too?

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 19:07 #32254 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
Yep the guy who installed the engine got the runners to move again. But it’s still low on ve. I looked and it appears to be a dorman maf sensor on it... I’ve checked the air filter for cleanliness. It’s a brand new jasper engine. Desired and actual fuel rail pressure match. O2 sensors still go lean. Either the maf is junk or possibly an injector flow issue. But that wouldn’t explain low numbers on ve

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 19:09 #32255 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
I’m using the launch x431 scanner possibly the scanner isn’t updating quick enough and I’m missing peak numbers on the maf. I might try and borrow a snap on scanner since there graphing is a lot better. And retest.

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 19:28 #32256 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test

Cheryl wrote: Either the maf is junk or possibly an injector flow issue. But that wouldn’t explain low numbers on ve


It definitely could, especially being Dorman junk. :cheer: VE is mostly based on the peak MAF rate. So if the MAF is underreporting, you'll get a lean @ WOT and low VE numbers.

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 19:38 #32257 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
I’ve always used the general rule of engine displacement multiplied by 49 to get a w.o.t maf reading. What’s your rule of thumb

Please Log in or Create an account to join the conversation.

  • Cheryl
  • Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
29 Jul 2019 19:38 #32258 by Cheryl
Replied by Cheryl on topic 2005 F-150 low volumetric efficiency test
40 not 49

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
29 Jul 2019 19:42 #32259 by Tyler
Replied by Tyler on topic 2005 F-150 low volumetric efficiency test
Same, but I tend to rely on Load PIDs more and more these days. Dunno that your '05 would have Absolute Load? Might be fun to see what it says.

Please Log in or Create an account to join the conversation.

  • Not Allowed: to create new topic.
  • Not Allowed: to reply.
  • Not Allowed: to add attachements.
  • Not Allowed: to edit your message.
Time to create page: 1.148 seconds