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!

2004 F150 maf specifications

fvalck
Topic Author
Offline
New Member

8 years 10 months ago #2993 by fvalck

2004 F150 maf specifications was created by fvalck

Hi to everybody, new to the forum and to the diagnostic. I'm looking for the specification of the drop in maf sensor on a 2004 5.4l.
So far I have negative long term fuel trims at idle and between 12 and 18 at 2500 rpm. The voltage koeo on the signal wire is 0.5. On koer the idle voltage is 0.7 and at 3000 rpm is 1.6. I already clean the maf and no change. Please help.

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

cheryl hartkorn
Offline
Platinum Member

8 years 10 months ago #2995 by cheryl hartkorn

Replied by cheryl hartkorn on topic 2004 F150 maf specifications

what does the grams/second read at idle?

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

Tyler
Offline
Moderator
Full time HACK since 2012

8 years 10 months ago #3000 by Tyler

Replied by Tyler on topic 2004 F150 maf specifications

I've got some known good data from an '05 F-150 5.4L I worked on recently:

www.scanshare.io/share/LSMwrX9cbEy44uGhy...12,26,27,28,29,30,31

Looks like the idle MAF voltage was .87V. If the MAF was causing the rich trims, then I figure your MAF voltage would have to be higher than that, not lower.

Cheryl, any luck on your F-150 with rich codes?

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

cheryl hartkorn
Offline
Platinum Member

8 years 10 months ago #3004 by cheryl hartkorn

Replied by cheryl hartkorn on topic 2004 F150 maf specifications

reflashed it a couple weeks ago. haven't seen it since. didn't want to post the fix until it had a few weeks to see if the flash took care of it

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

Tyler
Offline
Moderator
Full time HACK since 2012

8 years 10 months ago #3006 by Tyler

Replied by Tyler on topic 2004 F150 maf specifications

cheryl hartkorn wrote: reflashed it a couple weeks ago. haven't seen it since. didn't want to post the fix until it had a few weeks to see if the flash took care of it

Sweet! Gotta tell matt.white that I won our bet

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

fvalck
Topic Author
Offline
New Member

8 years 10 months ago #3026 by fvalck

Replied by fvalck on topic 2004 F150 maf specifications

At 607 rpm the g/s is 5.37.

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

Noah
Offline
Moderator
Give code definitions with numbers!

8 years 10 months ago #3047 by Noah

Replied by Noah on topic 2004 F150 maf specifications

A quick hip-shot spec is 1g/s for every liter of displacement at idle..
So 5.37g/s is pretty close to the 5.4l displacement of the engine.
This isn't the best rule to follow, there are exceptions, but it can be useful..

"Ground cannot be checked with a 10mm socket"

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

Time to create page: 0.364 seconds