94 Bronco Confusion, please Help
Thread Starter
|
Senior User
Joined: Aug 2004
Posts: 125
Likes: 0
From: Thayne, WY
94 Bronco Confusion, please Help
I have a 94 Bronco with a 5.8L and a 4r70w auto tranny. Is this a rollercam engine or how can I find out? Is this a speed density system and if so should and how do I convert to MAF? It runs great, but after it warms up and I shut it off and restart it ,It feels like it is going to die, sputtering and when I step on the gas it hesitates for about 5 seconds, then takes off like nothing was wrong, does anyone have a clue as to what this could be. I am not getting any error codes, and am baffled. I thought a complete tune-up would solve problem, but it is still happening. Any help would be greatly appreciated.
Last edited by 80Bronco94; Aug 2, 2004 at 02:42 PM. Reason: add Icon
Senior User
Joined: Jul 2004
Posts: 351
Likes: 0
From: Arkansas
as far as SD or MAF the SD throttle bodys have dual intakes and hoses
the MAF have single intake throttle body and hose or they can have a dual intake throttle body with the two hoses merging into one (atleast thats how i tell im sure there are more accurate ways)
in order to switch from sd to maf you would need the computer, harness, and maf sensor
as far as the idle maybe start by cleaning the throttle body and replaceing fuel filter
im not the most mechanical person so someone should chime in to back up/disagree
the MAF have single intake throttle body and hose or they can have a dual intake throttle body with the two hoses merging into one (atleast thats how i tell im sure there are more accurate ways)
in order to switch from sd to maf you would need the computer, harness, and maf sensor
as far as the idle maybe start by cleaning the throttle body and replaceing fuel filter
im not the most mechanical person so someone should chime in to back up/disagree
Thread Starter
|
Senior User
Joined: Aug 2004
Posts: 125
Likes: 0
From: Thayne, WY
Ok, so I know I have SD, where can I get a laundry list of items I need to convert it? What are the best donor vehicles to get the parts? I have already changed all the filters and cleaned the entire engine and throttle body, I bought this Bronco in May and it was a very neglected beauty. I have done an extensive tune-up to it, but the problem is still there, thanks for any advice
Senior User
Joined: Jun 2003
Posts: 201
Likes: 1
From: NC
don't bother converting to MAF. fix your problem first.
Some 351 do have hyd roller cam from factory or the block have roller provision for roller lifter spider tray and dog bone setup. Easiest way to check is remove the valve cover and 1 rocker arm. look down the pushrod hole with a flashlight and check for " dog bone " and " spider set up" .
Throttle body for speed density and MAF are 100% identical.
I just work on 2 MAF full size 1996 Ford F150 truck this past weekend. One is 6 cylinder and other is 302 with 351 firing order.
yes, you read it correctly....factory stock 302 truck motor with 351 W firing order. This motor have roller camshaft.
Some 351 do have hyd roller cam from factory or the block have roller provision for roller lifter spider tray and dog bone setup. Easiest way to check is remove the valve cover and 1 rocker arm. look down the pushrod hole with a flashlight and check for " dog bone " and " spider set up" .
Throttle body for speed density and MAF are 100% identical.
I just work on 2 MAF full size 1996 Ford F150 truck this past weekend. One is 6 cylinder and other is 302 with 351 firing order.
yes, you read it correctly....factory stock 302 truck motor with 351 W firing order. This motor have roller camshaft.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
first off ,dont convert. stay with the stock system . go to an autoparts store and have them pull codes. its free and will give you an idea of whats wrong. also give you rig a tune up would be another good start. that consists of plugs (cheap autolites,motorcraft,champion) are all good. dont get platnium plugs. get a new cap & rotor, 9mm fordmotorsport wires. also replace the fuel filter. get yourself a haynes manual it will help and so will we with questions you might have. by the way your tranny would be the E4OD.
late
late
Thread Starter
|
Senior User
Joined: Aug 2004
Posts: 125
Likes: 0
From: Thayne, WY
Is there some kinda marking on the block telling me if it is roller or setup to be roller? On the tranny, how do I tell the difference between 4r70w and e40 d, I had it serviced and was told it was the 4r70w? are there markings on it anywhere telling me for sure? Why wouldn't you put platinums in the engine? I have already replaced plugs, wires, cap, rotor, all filters and fluids. I appreciate the advice. Can I increase displacement and stroke it with it being a SD system?
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
no you cant stroke with speed density that would be the only reason to convert.
yes there should be a marking on the block try a search on this site and on the 302/351w forum . i just cant remember it off hand. i couldnt tell you how to indentify what tranny you have try a search on that to.
the reason for not using plat is because even though they last longer plat is not a good conductor so your basic cheap copper plugs actually give better spark.
yes there should be a marking on the block try a search on this site and on the 302/351w forum . i just cant remember it off hand. i couldnt tell you how to indentify what tranny you have try a search on that to.
the reason for not using plat is because even though they last longer plat is not a good conductor so your basic cheap copper plugs actually give better spark.
Trending Topics
Thread Starter
|
Senior User
Joined: Aug 2004
Posts: 125
Likes: 0
From: Thayne, WY
thanks, I really appreciate the help, I am thinking that something in the ignition is going bad, IE coil or something in that area, it only does it when its hot and seems like either no fuel or something going crazy in the ignition. If anyone can help me in identifying the block and tranny I would be extatic. thanks for the help guys.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Senior User
Joined: Jun 2003
Posts: 201
Likes: 1
From: NC
forget about T.B spacer..useless.
underdrive pulley does make a difference but it is not practical on trucks in my opinion.
They do reduce alternator charging operation if you got more than 1 or 2 accessories turn on.
Module?? you mean aftermarket TFI module?? I haven't seen any significant changes by installing aftermarket TFI module on stock motor.
you can stroke any speed density motor as long the camshaft duration is less than 220 degrees and uses wide centerline. above 112 degrees.
There are Mustangs and Trucks out there with a stroker speed density motor.
Identification on block isn't a sure fire way to determine if the block is roller camshaft or not. You can still have 1 casting number for both roller camshaft block and flat tappet hydraulic camshaft block with no provision for roller camshaft spider tray and dog bones. [ I've been there and done that a lot of times ]
You still need to remove valve cover and check it.
underdrive pulley does make a difference but it is not practical on trucks in my opinion.
They do reduce alternator charging operation if you got more than 1 or 2 accessories turn on.
Module?? you mean aftermarket TFI module?? I haven't seen any significant changes by installing aftermarket TFI module on stock motor.
you can stroke any speed density motor as long the camshaft duration is less than 220 degrees and uses wide centerline. above 112 degrees.
There are Mustangs and Trucks out there with a stroker speed density motor.
Identification on block isn't a sure fire way to determine if the block is roller camshaft or not. You can still have 1 casting number for both roller camshaft block and flat tappet hydraulic camshaft block with no provision for roller camshaft spider tray and dog bones. [ I've been there and done that a lot of times ]
You still need to remove valve cover and check it.