Ford Ranger / B-Series :: 1993 - Getting 157 / 158 And 159 Codes - Mass Air Flow Voltage?
Aug 6, 2015
Truck is a 1993 ranger 4.0 ohv
Ok I have been getting 157, 158, and 159 codes. I have cleaned and replaced the MAF with no success. I checked the voltage to the sensor 12v, checked the voltage from the signal wire and it is to high. It has been high on the cleaned unit and on both replacements, so I am thinking it is not the MAF, but what will cause it to register high. I cant get the signal voltage below 1.9V at idle.
Signal also reads high with the ignition on and the engine off. What would cause the voltage to be high, I have read it could be an IAC but I would think that would not effect it with the engine off.
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I just tried doing the self test for reading the codes via the check engine light with the OBD1 system on my '93 4.0 Ranger. Problem is: When trying to mark down the flashes of the check engine light, they flash so erratically and rapidly that there is no way to accurately count. At times the light flickers so fast it never even gets to get fully bright enough to tell if it is actually a "flash" or not. I'm (again) trying to diagnose an issue with the truck starting and running fine for about 3-4 minutes and then like flipping a switch begins blubbering and belching out black smoke, check engine light flashes on/off randomly, then the engine will eventually die. It will restart provided the ignition switch is turned all the way off and attempted again, generating same results only within 30 seconds or so. If you try restarting w/o turning the ignition all the way off, it'll spin over but won't start. ECM?
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I recently picked up a 2000 jetta vr6 for a very good price its a glx I have owned a vr6 before and done timing chains myself on it this one is a glx , I am having 5 fault engine codes on my vagcom they are cam position sensor , knock sensor, secondary injection pump, and mass air flow it ran fine 100 miles yesterday this morning the epc came on then went off and ran bad can these codes all be related or do I have to replace each sensor individually..
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What controls where the air flow is directed in the cab? I've just finished replacing my power steering pump, ac compressor, dryer, and ac hoses. I have air flow to the defrost and some on the floor bu none coming straight out. It worked normally before so I did something. ('96, 4.0, auto tranny, XLT).
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The air flow with ac and heat is low on my ford ranger. I can hear the blower change speeds, but on high, it barely comes out. The temp is fine and achanges from cold to hot like it should. i had the ac checked out by a shop that that does free checks - no problems with lines or compressor. I replaced the blower motor. The air changes from defrost to floor and all the positions fine, but the air flow out all the vents just isn't what it should be. It was working fine the first couple of days. I've read about the blend door motor, but I haven't read about people having this exact problem. I am almost to the point of bringing is to the dealer, but would rather fix it myself.
2007 Ford Ranger ... 6 cyl. 3.0 L ...
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I have a 5.0 with the Explorer intake, GT40 heads, RJM harness, E303 cam, and a A9M computer in a '68 Mustang.
When you let off of the throttle the CEL comes on indicating low voltage on the MASS air meter. I changed the MASS from the '89-93 5.0 Fox Mustang meter to a new '94 Cobra style meter, reset the computer and it does the same thing (immediately).
Current intake setup is the Explorer throttle body, an '89-93 Fox 45* elbow, MASS air meter and a double cone Spectra air filter mounted directly on the meter.
I don't really have room to go cold air unless the battery goes in the trunk and since this is my wife's daily driver, I am reluctant to. Car is running open loop at 12mpg.
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I have a 2000 Ford Ranger 3.0L engine, 2 wheel drive, with automatic transmission. Check engine light came on about 3 months ago. checked with scanner and P0401 EGR flow insufficient came up. cleared it and it came back. truck seems to be running fine. I didn't take autoshop as a kid, so i probably will need a little hand holding on this one.
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I got an 0401 EGR Flow Insufficient last week. I cleared it and it showed up again after a couple of days. I replaced the EGR Valve and the 0401 reappeared. I replaced the DPFE and the code did not reappear. Great!
About a week later, I got an 0402 EGR Flow Excessive. New EGR Valve. New DPFE. The hoses to and from the DPFE to the tube look decent. They don't appear to have any build up inside. Code 0401 or 0402 to the tube?
My first instinct is to replace the EGR valve again, assuming the one AutoZone gave me is stuck open. Is there any servicing I can do to it first? Like maybe soak it in carburetor cleaner? Or spray it with WD-40?
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So I had a post up saying "is MIL P1444 a urgent fix" and I got "no". On an other website though it said that it was an urgent fix. They said it was "similar to running a bad catalytic converter. You don't want to do it."
P1444:
Possible causes
- Faulty Purge Flow Sensor
- Purge Flow Sensor harness is open or shorted
- Purge Flow Sensor circuit poor electrical connection
So I located the purge flow sensor and look at the tube that connects to that,the canp solenoid, and the carbon canister. Nothing looks bad, but I did notice that the tube that connects to the carbon canister to the solenoid is not connected. The part that connects to the carbon canister dry rotted off. So I turned on my car to see if anything was coming out of that tube or air and there was nothing (not sure if that's good or bad). Also a week ago when I filled up my gas tank (before the check engine light was on) a lot of fumes were coming out of the tank while pumping.
The scanner i use also lists the secondary air system, the EVAP system, Heated catalyst, and the AC refrigenant has red X's, but they weren't continuous.
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I had a check engine light on my 2005 Ford Taurus and my mechanic suggested cleaning the mass air flow. Afterwards, the light was off and the car seemed to drive fine ( it was driving fine even with the check engine light on) But my mileage dropped drastically. On the freeway it went all the way down to 10mpg! Right now around town it is fluctuating a bit, but around 14mpg. Should I have the mechanic check for a loose wire or something not connected properly? Or just replace the darn mass air flow?
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So, I've got a new toy (FORscan ODBII software) and a new code that isn't turning on the CEL (yet) but also didn't show up in OBDWiz either.
P1100 - Mass Air Flow (MAF) Sensor Circuit Intermittent
I cleared it, drove a few miles, checked again and it's set again.
The little troubleshooting advise window in FORscan says to monitor the MAF voltage while wiggling the MAF harness and see if the voltage goes below 0.23v or above 4.60v. I was unable to manually make that occur, no matter how I tapped on the MAF or wiggled the wiring.
However, in oscilloscope mode, look at this (at idle):
It sure looks like it went below 0.23v here. I have no time tonight to do any research. This is a relatively new MAF (one week old, Delphi unit). I think I'll swap it out for one of my two old OEM MAFs sometime this week. But if any opinion about this, pipe up. I do damned little work with scanners these days, and the tech keeps changing.
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I am starting to work on my 93 ranger when funds are there. But my question is do i need a Cat. for PA state emissions? I have heard you do but then I hear you don't. I have also heard a few things on the fuel millage and power.... Looking for some info on this because I am not trying to cut it off and have to go back and fix it again... I want to do it once and be done with that part!
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Today on my way to work my 1993 ford ranger would shift fine but would refuse to go over 35mph and shook pretty bad. I don't know where to start...
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Not only will it not go into gear, truck will not start unless clutch is to the floor, and in neutral (it's only possible place) if you pick the pedal up 1/4 inch off the floor the odometer starts spinning around 1 mile in 5 seconds.... if you lift it any more it kills the engine like you shut it off with the key.... odometer reads 99,004 miles now (the last 2 are mine) I bought this truck like this ....
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Im trying to change my spark plugs in my 2.0T. For some reason I can not figure out how to undo the mass airflow sensor from the connector and the same for the spark plug coils.
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I have a ranger as said in title. No a/c. I noticed my belt was cracked very badly so I bought a new one. Dayco made for Ford and Mazda 3.0L V6. Looked the same length as the old one so I put it on and all was good. Then about 2 days later it started squeaking very loudly, not all the time, just 1500 rpm and higher. The hotter the motor got (not overheating just to running temp) the higher rpm it took for it to squeak. I put a stethoscope on all the pulleys/pumps and alt. It sounded the strongest on the idler.
So I replaced the idler and bearing (which the bearing was bad, but not the source of sound) it wasn't that. So I thought I'd give the belt a couple days, maybe it was too tight causing a bearing to get too tight and squeak. And the more I drove it the louder it got with less rpm needed to make it squeak. So I tried belt dressing, and still no fix. So today I put the old belt back on to see if that was the issue. Sure enough, it started up and squeaked just the same, but I tried the belt dressing on the old belt and it went silent, even at 3000 rpm. So I assume from this the new belt was a smidge too big. Right?
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How do you remove this clip holding the wiper linkage to the back of the motor? I can't see what kind of clip it is to know how to remove it. Ford says to remove the wiper pivot and let it drop. Is that necessary? I can't barely get to the back of the motor so I'm having to feel the clip and remove it but since I don't even know what kind of clip it is it makes it so much harder. Does the cowl cover not come off or is it just this access panel?
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I'm new to the whole Ranger truck thing since buying a 1993 Ranger 4x4 for my 14 y/o son. It has a 4 inch suspension lift and a 3 inch body lift running 33x10.5x15 tires. The front sway bar is not hooked up. I know that i will need drop brackets for the sway bar but my question is about the end links needed for this truck. There are 2 tabs with provisions for a horizontal bolt on each side of the twin I-beam where the end link would attach and the sway bar has a single horizontal hole on each end. Searching for replacement links at various auto parts websites only seems to yield the standard end links that consist of a straight bolt with a nut on each end and the rubber insulators. That clearly is not the correct end link for my application. Not sure if the front suspension is the factory installed unit or if it was swapped some time in the part.
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I am trying to replace the key lock cylinder (where you insert your key to start the truck) in my 93 Ranger. Using the Haynes manual, I have removed the steering wheel cover (I don't have airbags), pulled the steering wheel, removed the 3 plastic decorative shrouds and looked at a naked steering column assembly. The manual says there is a 1/8" hole on the bottom of the steering assembly where you can push up the actuator pin to release the lock cylinder assembly.
I looked and looked (even with a flashlight) and could not find a hole. I looked at the new key lock cylinder assembly and found the little actuator pin so I sorta know where the pin would be in the installed assembly. The entire key lock assembly is enshrouded (is that a word?) in the cast aluminum steering assembly.
There was a small metal plate - but that plate is just for access of the release of the steering wheel lock actuator (so I carefully bent it back!!). I know all this is for theft protection, but the truck is co safe I can't even replace the lock assembly.
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Where the modulater valve is on my A4LD tranny. I have a 93' ranger XLT extra cab 2wd with 4.0 engine. I have looked all over the tranny and thought it would be somewhere I could see it. I know I had one on my old full size Ford truck with C6.
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Where is the location of the fill plug for a 93 Ranger transfer case? The damper is off and I see the drain plug. Is the fill plug behind the electric motor that shifts the case? I can see what may be a plug there that looks plastic with a very small hex head in the center of it. Is that it?
Also, my Haynes manual says to use Mercon ATF in the transfer case. I see where Valvoline has a Mercon equivalent. What do ATF brand people here recommend?
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