Ford Ranger / B-Series :: 1991 - Throttle Hesitation When Accelerate
Aug 21, 2012
My ranger is an 89 but it's got a 91 motor in it, 2.9 V6. When I accelerate it hesitates before actually accelerating which makes me think the TPS is bad. Probed and tested and I got .85V throttle closed and 4.65 at wide open. Specs call for .8V - 4.5V
I'm not sure if there's an allowance of fluctuation, but is that high enough to point out a bad TPS? If it's not the TPS, is the ignition timing off or what else could it be?
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So among the other annoyances my 92 Ranger 4.0 auto has it has a hesitation before it starts spinning the tires under full throttle from a dead stop. It's the 4.0 automatic. I thought it would have more power than it actually does being use to a 2.5 auto. But this 92 4.0 runs and drives good. I've gotten it tuned up with new motorcraft wires, plugs, new coil, fuel filter, fuel pump assembly, fuel pressure regulator, air filter, idle air valve, new O2 sensor, new Dynomax muffler. I can't find any vacuum leaks. The engine idles slightly rough after you start it up from it sitting for a few hours, but quickly smooths out as soon as you start driving it.
This one here has no EGR. Transmission feels good, may have even been replaced by previous owner before we got it. It shifts good and the fluid is clean and the transmission is the cleanest part under the whole truck. No way of knowing for sure. The truck currently has 111,000 miles and I did all that stuff when we got it at 101,000 miles. So what could it be? I'm thinking a lazy injector or could it be the catalytic converter? Or could it be the throttle body? I know I once had a BBK throttle body on it and it made the world of difference in off the line power but it kept throwing too rich/lean condition and a TPS code so I had to return it. It sucks because it did wake up the motor. I returned it and since then the Check Engine Light hasn't come back on.
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My 1991 ranger with a 4.0 turns over but will not start. It acted like it ran out of gas put again seems to do ok then it did same thing it sat over night then would not start so I thought I would put some gas in the intake so it starts ran real rough but smoothed after a few minutes ran fine after that next morning same thing no start did same put gas in intake at first no start just turned over didn't even try let it sit for awhile then tried again it fires up ran rough but ran now I get nothing just turns over pulled codes 22and 122 replaced both had ignition mod checked its good new coil pack no change so at this point i hear fuel pump kick on fuel getting to fuel bar but seems a bit week on pressure going to get pressure gauge and see what it says but in the meantime I am loosing my mind...
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I recently bought a 91 Ranger 4wd for my son. The guy I bought it from put new manual lock outs on it. every time I take the tire off on either side the hub comes with it! Is there a clip or retainer missing? If so what and where can I get one?
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My dad's 1991 Ford ranger 3.0 2wd just died on him when he was driving home and I checked to see if the truck had a spark and it did not so I replaced the ignition control module, then ignition coil, then distributor and rotor cap(plug) and I put new plugs and wires on it a few months back too. I also checked to make sure that the timing chain was working as well (while I had the distributor cap off). Then I realized that the EEC maxi fuse was blown. I then found a fourm that said it might be the relay so I replaced the EEC and the fuel pump relays while I had them both out. Every time I put a new 30 amp fuse in the EEC slot and turn the key to start it the fuse blows and the truck won't start. What might be wrong?
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Getting the Banana ready for it's smog test appt at the shop last night (it WAS today) Check engine light had popped on and it had been starting to sputter and surge at the idle occasionally for the last few days so I took a look at the MAF and saw dirty wires. Aha I can fix that, a couple squirts of MAF cleaner, plug it back in and voila! No more light, the Banana ran down the road around the block, over the hill and through the dale like a champ. I shut her down and call it a night.
This morning, hop in and fire the Banana up like usual and all I get is a nice peppy crank over. The Banana has had a bunch (pun intended) of new parts throw at her recently... new battery, starter solenoid, plugs and fuel pump relay and fuel filter. All within the last couple of months.
Out of complete disbelief, I ground on the ignition for a little while and she finally kicked over and sputtered to life. I let her idle a couple of minutes and things seemed fine so off we go. I make it about a block before the Banana starts hiccuping and bucking like something possessed and dies.... kaput.
The Banana has a 3.0, manual transmission and at least half a tank of fuel. Long story short and a tow truck ride home again, half a day trying unsuccessfully to pull a code, any code.... nothing. She will half-heartedly cough and spastically run with ether shots and near as I can tell I'm not getting fuel to the fuel rail relief port. I'm really hoping there is some way to diagnose a faulty fuel pump without having to drop the tank and fish the damn thing out.
I'm not hearing it run when the ignition is turned on but then again I don't think I've ever heard it run. Any other things to try before I replace the pump itself???
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1991 2.3 l. Thought I had an exhaust manifold Leak. Replaced gasket. New gasket didn't work. Removed gasket and mounted manifold to engine metal to metal, still and noise. Installed New manifold with gasket. Still same noise. Am thinking noise not coming from manifold. Torqued all bolts to spec. Could it be lifters .
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Grandson 1991 Ranger 3.0 v6 69,000 miles We have a long start issue after it has sat for 30 mins. plus. If you open the throttle part way while cranking it will start fairly easily. Fuel pressure comes up instantly when you turn on the key. It runs at 39 psi pull the vac line off regulator it jumps to 49 psi. Fuel pressure does drop to about 30 psi after setting an hour. It kinda acts like it is flooded when it starts. so far we have done a complete tune up plugs wires cap and rotor. The ignition module has been replaced twice last one a real Motorcraft. New fuel pump and filter. Cleaned the fuel injectors with Ford cleaning system. I will replace the coil next and maybe clean the iac.
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I have a 91 Ranger that the A/C was working great in but all of a sudden it stopped working even the fan. I turned it of and back on and it started again but then just stopped for good I can get the fan to work sometime, but no cold air. What it might be?
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I can't get power to the fuel pump on my 91 ranger 3.0 5 speed. I just bought the truck and replaced all the relays checked all the fuses under the dash and under the hood. If I jump the relay it comes on and wont go off.
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1991 Ranger 4.0L A4LD... Its a 4x4. ext cab
What else will bolt up to this 4.0L? Could i put a 4R44E/4R55E tranny? Is there a good stick that bolts up?
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I have a 91 Ranger V6 4WD with 150K that has been sitting for 7 years. The last time I drove it (7 years ago) to a mechanic, who diagnosed it with a bad head gasket - leaking coolant and coolant in the oil.
What am I looking at as far as a project: besides redoing the head gasket, what else will I most likely need to do given that its been sitting 7 years?
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I now have a 1991 ranger 3.0 super cab. I need a step by step walkthrough of how to time it. Keep in mind that I ha the distributor out while turning the engine over so I need from start to finish, including the spout connector. It runs right now but idles high at the start and the. Stumbles down to about 500rpm and sometimes dies....
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I have a 91 Ranger 4cyl. Tune up about 2 months ago. Mileage about 178,000. When the temperature gets below about 45 degrees, the truck will not start. It cranks like the battery has plenty of juice but refuses to start. Once the temp warms up, the truck will start first crank.
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That's the best way I can describe part my latest problem. If I'm stopped at a light, a lot of the time it almost feels like it wants to stall when I first pull out. Then, it seems like it is shifting funny at certain speeds like the transmission can't decide what gear it wants to be in. Tends to do that about mid acceleration (don't have an rpm gauge to look at). At idle it seems to run fine. BTW, engine also runs rough with the ac on.
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My '91 Ranger 4X4 has developed an odd rattle that sounds like it's coming from the transfer case. It seems to be pretty much the same whether the truck is stopped or moving, or in Park or Reverse, or in 2wd or 4wd or Low Range. I hear it when the engine is just idling, with the transmission in Park and the parking brake on. It seems to be getting louder. I have the 4L V-6 with auto transmission.
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It looks like my door lock wire looms go under the hood but I haven't had any luck finding them. Install an alarm with negative 500Ma pulse to operate them ? I have relays but am also wondering if the truck has its own somewhere that I can piggyback onto. I know the colors are Pink with a yellow stripe and Pink with a light green stripe.
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My 4x4 4WD Ranger has a 5 speed manual tranny that locks up after going forward a few feet. It can back up all day long but locks up going forward. some god awful noises (grinding, clunking, etc) come out of that gearbox. the 4wd is electrically operated. the ? is , can this tranny be rebuilt with a kit? I'm having great difficulty finding a replacement. Are bronco II's compatible? Engine is 2.9L V6. On disassembly I found 2 meshing gears with broken teeth.
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I spent the day with a buddy working on his 91 ranger 4 cylinder 2WD truck because the clutch master cylinder shaft that connects to the pedal bent. We took the old part out and replaced it, but now we are having problems with the little pin that holds the line from the slave cylinder to the master cylinder in place. For some reason, even though the line is securely in position and wont budge with the pin in, it still leaks so we are unable to bleed the clutch.
I have looked all around the internet, including this site and wasn't able to come up with any explanation as to why the line is leaking, perhaps it is because the line isn't pushed in far enough, but like I said, it is securely in place and I wasn't able to push it in farther before forcing the pin into place. My buddy and I spent about 9 hours working on his truck today, including probably 3 or 4 just on trying to stop the leak.
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1991 Ranger STX, 4.0. Had a leak from the rubber seal on the thermostat. Changed the thermostat (stat 195) and seal. Now my temperature gauge is not showing a constant reading, goes to half way and when the thermo opens the gauge falls down to a quarter. The gauge is cycling this way every time the thermo opens.
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I have a weird issue. When I'm running AC on my 2.3l ranger sometimes the idle wont go down but rather hold its current RPMs till i either turn the AC off or place the truck back in gear. What that could be?
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