MAF or not???
Elder User
Joined: Nov 1999
Posts: 780
Likes: 1
MAF or not???
"Two hoses"--that's the giveaway. You have a speed density setup.
Were it MAF it would have the same twin-butterly throttle body, a plastic "Y" adaptor to join both bores into one large-diameter hose leading across to the air box.
You would also have a '95Calif./'96 50-state truck, and OBD-II.
Eddie
Were it MAF it would have the same twin-butterly throttle body, a plastic "Y" adaptor to join both bores into one large-diameter hose leading across to the air box.
You would also have a '95Calif./'96 50-state truck, and OBD-II.
Eddie
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
MAF or not???
That's sorta true except Mass air didn't come out til 1994. And I don't think 351's got it until 1995. 300's didn't get Mass air until 1996. (49states) And possibly the 460 never got it. I don't know why not, they used a 302 computer and firing order anyway.
Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
MAF or not???
Actually some of the earlier trucks (california) had mass air before 94. I found a note in my Chiltons repair manual that stated that.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
Elder User
Joined: Nov 1999
Posts: 780
Likes: 1
MAF or not???
Gentlemen, I stand corrected!
Burning question: was there an OBD-I MAF system available for 4.9L, manual transmission trucks? What was it available on? Which model(s) do I need to be searching the boneyards for? Over 8,500-lb. GVW trucks and vans?
Eddie
Burning question: was there an OBD-I MAF system available for 4.9L, manual transmission trucks? What was it available on? Which model(s) do I need to be searching the boneyards for? Over 8,500-lb. GVW trucks and vans?
Eddie
Freshman User
Joined: Aug 2000
Posts: 26
Likes: 0
MAF or not???
Eddie,
Have you looked into trying to find somebody to burn a chip? That seems like the easy way out if it is possible.
Just my 2 cents.
Tom
Rockwall, TX
87 F150 4.9 4spd
Bone Stock
Have you looked into trying to find somebody to burn a chip? That seems like the easy way out if it is possible.
Just my 2 cents.
Tom
Rockwall, TX
87 F150 4.9 4spd
Bone Stock
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Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
MAF or not???
Hotrodford_88: That is a possibility, but none inside the other 49 states had em.
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Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
MAF or not???
Right, California is the first to get everything. Darn the luck.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
MAF or not???
I have seen that some of the newer cars (crown vics, caprices, and the like) are coming with (get this) 6 Cats! I cannot believe that, it's no wonder why car prices are so stinking high!
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
MAF or not???
Mass air, measures the amount of air coming into the engine, and figures the ari/fuel ratio by that.
Speed density, takes a measurement of the speed you are going and figures the air fuel ratio.
Therefore mass air is better, it allows for Modifications to be done to the engine that affect air flow. With speed density, if you change the amount of air going in, then you mess up the calculation of the air fuel ratio by the computer.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
Speed density, takes a measurement of the speed you are going and figures the air fuel ratio.
Therefore mass air is better, it allows for Modifications to be done to the engine that affect air flow. With speed density, if you change the amount of air going in, then you mess up the calculation of the air fuel ratio by the computer.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
MAF or not???
Today's cat convertors are more breathable than our years. I guess this would explain why most cars have 4 anymore. My best friend has a 96 Gt 4.6L and his has 4. I can't imagine how it will run with a X-pipe and 2 convertors.
Thread Starter
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Senior User
Joined: Mar 2001
Posts: 177
Likes: 0
MAF or not???
ok its me again, I have put true duel exhaust and a K&N air cone on my truck, its speed density, could that be the reason why it backfires when i down shift?? Is there anyway to cure it?? How hard is it to change it over to a mass air flow system?