I'm about to get rid of this dam truck...its a 1994 4.0l xlt.i have had all my mechanics in town test it and they can't tell me what it is.i have had it read fore codes all I get is 111 no codes...what is doing is when I press the gas a little bit its normal but if I press it down more then the truck just falls right on its face but you let off the gas and it stops.its just getting worse and worse...no check light.what I have changed is.fuel pump,fuel filter,iac,maf,coil pack,plugs,wires,o2 sensors,have no cats...i will give money to who ever tell me what it is and it work not kidding at all......it squeal some times when its warm to.and when at idle it goes up and down alot also when driving. Is there any way its a cam positioning sensor??? I just don't want to keep spending money this sucks it never used to do this it just started doing it a couple months ago.4.0 Someone please help me thank you..

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1994 ford ranger xlt 4.0l..4 suspension 3 body...5% tint.33"tires...new clutch fuel pump fuel filter water pump led tail lights. New head lights.new silver paint job.tube back bumper all of the engine senders are changed super 10 flow master duel.sas going in soon.custom 1 price driveline.sooo much money in this thing haha

Check for vacuum leaks? TPS?

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2004 Ford Ranger XLT FX4 Level II : Weekend Driver (Oct. 2013 TOTM)
2003 Ford Ranger EDGE 4x4 : Daily Driver
1991 Ford Ranger XLT 4x4 Small Block Stroker : On going project
1994 Ford F350 Turbo Diesel 4x4, Short Bed Single Cab : On going project
1967 Ford Mustang Coupe : Restored to original

replace the TPS had one do the same thing never showed a code

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2004 jeep liberty 3.7 4x4
2000 POS ford windstar
1996 olds

But I did change the tps can it go bad by now? Found no leaks

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1994 ford ranger xlt 4.0l..4 suspension 3 body...5% tint.33"tires...new clutch fuel pump fuel filter water pump led tail lights. New head lights.new silver paint job.tube back bumper all of the engine senders are changed super 10 flow master duel.sas going in soon.custom 1 price driveline.sooo much money in this thing haha

your truck has a OBD1 system so it's different then the OBD2 system 111 code means everything is ok as far as the computer sees

check for vacuum leaks first Take a can of brake cleaner while the truck is running and spray a little on the vac lines If the engine revs up that line is leaking

If all the lines are ok make sure you are getting fuel to the engine and at the proper pressure make sure the spark plugs and good and getting power and make sure you are getting enough air into the motor

here is a diagram for the vac lines

Attached Images

image-128760267.jpg (44.4 KB, 28 views)

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95 Ranger XLT 4x2 2.3 I4 5 speed 206,000 *dead*
96 Ranger XLT 4x4 4.0 V6 5 speed 173,000 *alive*
D35 front, 8.8 rear, 3.73 gears, limited slip rear diff

X2 on checking for vacuum leaks also replace the fuel filter and check the fuel pressure.

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2014 F150 xl 3.7 6 speed auto.

and maybe check the cap and rotor, my stepdads 4 banger was doing the same thing, that's what it ended up being.

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2001 f250 7.3 zf-6
1979 f150 400/c6
Ranger free since December 2015
quote of the day:
The round flowing fenders of this vehicle have been lovingly reconstructed by a Dutch craftsman out of, what could be considered the most precious material on earth, bondo

While checking for vacuum leaks spray around the intake. See if there's a leak in the gasket.

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2004 Ford Ranger XLT FX4 Level II : Weekend Driver (Oct. 2013 TOTM)
2003 Ford Ranger EDGE 4x4 : Daily Driver
1991 Ford Ranger XLT 4x4 Small Block Stroker : On going project
1994 Ford F350 Turbo Diesel 4x4, Short Bed Single Cab : On going project
1967 Ford Mustang Coupe : Restored to original

Your 94 Ranger uses the EEC-IV engine management system, not OBD-II which came out in 96. With EEC-IV there are three types of codes, KOEO, KOER and CM. did you check all three groups?

Just because it came up with a 111 for KOEO doesn't mean there isn't a valid KOER code. The wandering idle suggests (but is not guarantee of) a vacuum leak. 4.0 Fords of your vintage are infamous for lower intake manifold gasket leaks, in fact, every one I've ever retorqued had at least one bolt that was finger tight. Knowing this, you should examine for a leak and as a PM action, retorque the lower intake to head gasket bolts.

*Did you do anything to this vehicle right before this issue surfaced?



It's a 94 4.0, it is a DIS, there is no cap/rotor.

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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl

Proudly JAP/RICE free since March 2000

You didn't mention air filter. Did you replace that as well? And just because you've replaced a part with a new one, doesn't mean it's good. Bad parts happen. I can't count high enough to register the times I've replaced parts with new just to be bad... Check 'em. Plug wires, plugs, coil, iac, maf, etc.... Don't assume it's good cuz it's new.

One other thing... Have you considered electrical faults? It's the number one overlooked diagnosis in all automotive repair worldwide. Check your grounds, check your harness plug, look for shorts, etc. I remember one vehicle at a ford dealership, a noob tech fresh out of UTI replaced over $3k in parts including the PCM, ECM, coils, etc, and it kept producing the same problem every time. Intermittent sputtering, erratic idle, loss of pwer. I finally took a look at it so we wouldn't lose anymore money, and found the culprit: a corroded ground connection. Problem: solved. Car ran fine after fixing that one ground.

Moral of the story: DON'T OVERLOOK ANYTHING!!!

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'96 Mazda B4000 LE 4x4, Auto Trans, Auto Hubs

95 not 96

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95 Ranger XLT 4x2 2.3 I4 5 speed 206,000 *dead*
96 Ranger XLT 4x4 4.0 V6 5 speed 173,000 *alive*
D35 front, 8.8 rear, 3.73 gears, limited slip rear diff

Federal MVR for 96 models sold in the US, some Fords migrated in 95. Really.

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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl

Proudly JAP/RICE free since March 2000

its a 94

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1994 ford ranger xlt 4.0l..4 suspension 3 body...5% tint.33"tires...new clutch fuel pump fuel filter water pump led tail lights. New head lights.new silver paint job.tube back bumper all of the engine senders are changed super 10 flow master duel.sas going in soon.custom 1 price driveline.sooo much money in this thing haha

still came out in 95

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95 Ranger XLT 4x2 2.3 I4 5 speed 206,000 *dead*
96 Ranger XLT 4x4 4.0 V6 5 speed 173,000 *alive*
D35 front, 8.8 rear, 3.73 gears, limited slip rear diff

Have you an answer for the question posed in post #9? Yes, it does matter.

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Yes, 95 was a mid production year migration for some Fords and as such, some have EEC-IV and since Ford migrated ahead of the mandate, some have OBD-II. Really. People looking for parts sometimes make the *discovery*, lol.

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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl

Proudly JAP/RICE free since March 2000