maf censor

Reply Subscribe

Thread Tools

Search this Thread

Aug 6, 2005 | 08:32 PM

wdb1971

Thread Starter

Freshman User

Joined: Jan 2005

Posts: 45

Likes: 0

From: ft. pierce fl.

maf censor

how does it work,could it cause the motor to run crappy /not let you get over 25mph /and not keep an idle
ive rebuilt the motor ,new injectors ,new fuel reg ,new exhaust

maf ??????

Aug 6, 2005 | 08:48 PM

Popa Tim

Posting Guru

Joined: Jun 2004

Posts: 1,781

Likes: 1

From: Central NY

The MAF sensor is the primary airflow sensor. It tells the computer how much air is coming and how dense it is. The computer uses this info to determine how much fuel to inject, so yes it can cause all these problems but so can other things. It is important that all incoming air pass thru this sensor, any opening after it will throw off the fuel ratio calculations. IE- you run like crap.

What new injectors did you put on? Were they truck 19# or mustang 24#?
You might want to tell us a bit about your rebuild that might be good to know as in any upgrades?
Check all your vacuum lines and intake for leaks and pull your codes.
http://fordfuelinjection.com/?p=13

Popa Tim

Aug 7, 2005 | 06:23 AM

wdb1971

Thread Starter

Freshman User

Joined: Jan 2005

Posts: 45

Likes: 0

From: ft. pierce fl.

well lets see my original engine had the same symptoms so i put injectors in . the old ones were cracked (8) (i think new injectors are #19) . still the same so i put a new fuel reg in and fuel pumps duel tanks ,and exhaust still no change . i had to change engines cuz the oil pump was clogged and engine was gumed up(badly) . put a junk yard motor in with my new part. same problems . so thinking the heads were bad i pull the motor had it rebuilt (30 over/m10 r20)no real upgrades

thanks
wdb1971

Aug 7, 2005 | 07:39 AM

EPNCSU2006

Lead Driver

Joined: Nov 2002

Posts: 9,555

Likes: 40

From: Concord, NC

I'd start off by seeing if there are any codes that might point you towards something being the problem. It is quite expensive to just throw parts at an EFI vehicle. The engine computer might narrow down the problem to one or two things. Here's another website on how to pull codes: http://www.thorssell.net/hbook/eectest.html

Aug 7, 2005 | 05:39 PM

wdb1971

Thread Starter

Freshman User

Joined: Jan 2005

Posts: 45

Likes: 0

From: ft. pierce fl.

thanks alot for all of your help as soon i can get the motor in my truck ill run the self test and get back with the results ( asap.)

wdb1971

Aug 7, 2005 | 05:55 PM

wdb1971

Thread Starter

Freshman User

Joined: Jan 2005

Posts: 45

Likes: 0

From: ft. pierce fl.

quick question does a 94 5.0 have a engine temp. sensor . and if it goes bad will you smell raw fuel . and were would it be on the engine

Aug 7, 2005 | 05:58 PM

Popa Tim

Posting Guru

Joined: Jun 2004

Posts: 1,781

Likes: 1

From: Central NY

You can clean the MAF wire with some spray electronics cleaner but do not touch the wire with anything!

The 5.o has two temp sensors, the one up by the thermostat is for the gauge and the one on the lower drivers side block (i'm pretty sure thats where it is) is for the computer. If the comp temp sensor goes bad then the computer will run the engine rich, thinking its not warmed up yet. IE- its stays in open loop mode and basically ignores the O2 sensor.

Popa Tim

Last edited by Popa Tim; Aug 7, 2005 at 06:04 PM.