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Car Forum / Ford / Ford Explorer / August 20061994 Ford Explorer 4x4 Acceleration Hesitates from a stop
Here is the problem with a 94 ford explorer. Whenever the truck is stopped, whether starting out from a driveway or an intersection, it hesitates / cuts out for a second when you put your foot on the gas. It doesn't seem to do this if you put your foot on the gas slowly and gradually, but lets say if you put it on a bit more, it waits / cuts out for a second then it goes. It doesn't do this when the truck is moving. I'm going to be changing all the fluids, and putting in new air and oil filters tomorrow. Could this be a spark plug problem? Previous owner said he changed the spark plugs, what if he didn't gap them properly? Don't forget the fuel filter and check/clean the maf sensor > Here is the problem with a 94 ford explorer. Whenever the truck is > stopped, whether starting out from a driveway or an intersection, it [quoted text clipped - 7 lines] > filters tomorrow. Could this be a spark plug problem? Previous owner > said he changed the spark plugs, what if he didn't gap them properly? i'll see if i can get a voltmeter to check the MAF sensor tomorrow. I thought the fuel filter was designed to last the life of the vehicle, according to the service manual, and if it did need to be changed, that the quick release clamps need to be changed too? if so I can't really do it because this tune up has to be done quick because its a friends explorer that i get for a couple of hours tomorrow and it has to go on a semi-long trip for about a week. so i'll deal with the MAF and the fuel filter when it gets back. Otherwise it runs fine except the hesitation from a stopped position. > Don't forget the fuel filter and check/clean the maf sensor > [quoted text clipped - 9 lines] > > filters tomorrow. Could this be a spark plug problem? Previous owner > > said he changed the spark plugs, what if he didn't gap them properly? I change them @ 30k because I'll buy gas wherever my tank is empty and those are not always the high volume gas stations I think 50K-60K is about the max for a fuel filter I'm sure some people have a other view on this > i'll see if i can get a voltmeter to check the MAF sensor tomorrow. I > thought the fuel filter was designed to last the life of the vehicle, [quoted text clipped - 20 lines] > > > filters tomorrow. Could this be a spark plug problem? Previous owner > > > said he changed the spark plugs, what if he didn't gap them properly? unfortunately I don't have a torx security bit to get the MAF off, but maybe when it gets back i'll modify one (have tons of torx). so with the MAF, just spray some carb cleaner let it dry, might be the problem with the hesitation (reading some other topics here). i've never taken out a MAF before, is it fragile or dangerous? > I change them @ 30k because I'll buy gas wherever my tank is empty and > those are not always the high volume gas stations [quoted text clipped - 29 lines] > > > > filters tomorrow. Could this be a spark plug problem? Previous owner > > > > said he changed the spark plugs, what if he didn't gap them properly? Yes , very fragile, no poking around with a sharp object, they sell special MAF cleaner in a spray can Is the air cleaner very dirty ??? That might be a clue, if they leak the maf gets dirty > unfortunately I don't have a torx security bit to get the MAF off, but > maybe when it gets back i'll modify one (have tons of torx). so with [quoted text clipped - 35 lines] > > > > > filters tomorrow. Could this be a spark plug problem? Previous owner > > > > > said he changed the spark plugs, what if he didn't gap them properly? says in my chilton manual that i can disconnect the air cleaner to throttle body air tube and the air cleaner housing to remove the MAF, so then I just spray maf cleaner on the filament or all over or where? i'll only do this if the tune up doesn't help the problem. > Yes , very fragile, no poking around with a sharp object, they sell special > MAF cleaner in a spray can [quoted text clipped - 50 lines] > > > > > > said he changed the spark plugs, what if he didn't gap them > properly? and do i disconnect the negative terminal of the battery when i do this also? > says in my chilton manual that i can disconnect the air cleaner to > throttle body air tube and the air cleaner housing to remove the MAF, [quoted text clipped - 55 lines] > > > > > > > said he changed the spark plugs, what if he didn't gap them > > properly? > > > > > > > Don't forget the fuel filter and check/clean the maf sensor > > > > > > > [quoted text clipped - 18 lines] > > > > > > > > said he changed the spark plugs, what if he didn't gap them > > > properly? Forget about the spark plugs unless you pull one out and it is digustingly dirty. My '94 Explorer has the exact same problem. I still haven't found the answer for it. The MAF is a great place to start. Don't bother adapting any of your existing torx fittings for it though. Just grab a punch and gently tap down the existing little annoying middle tit on the two MAF sensor screws. They will crumble like soft POS white metal that they are and you should be able to get a regular torx on it after that(at least that's what I did). I'm not guranteeing that this is going to fix your sluggish gas pedal(mine is still like that) but it may help. Try what the other posters have said first(because it is great information) and then post back with any other problems. I'm not a mechanic but I have first hand experience with the dreaded '94 Exlorer. Good luck. > > > > > > > Don't forget the fuel filter and check/clean the maf sensor > > > > > > > [quoted text clipped - 18 lines] > > > > > > > > said he changed the spark plugs, what if he didn't gap them > > > properly? Forget about the spark plugs unless you pull one out and it is digustingly dirty. My '94 Explorer has the exact same problem. I still haven't found the answer for it. The MAF is a great place to start. Don't bother adapting any of your existing torx fittings for it though. Just grab a punch and gently tap down the existing little annoying middle tit on the two MAF sensor screws. They will crumble like soft POS white metal that they are and you should be able to get a regular torx on it after that(at least that's what I did). I'm not guranteeing that this is going to fix your sluggish gas pedal(mine is still like that) but it may help. Try what the other posters have said first(because it is great information) and then post back with any other problems. I'm not a mechanic but I have first hand experience with the dreaded '94 Exlporer. Good luck. alright i'm going to attempt to clean it today. found a TSB on this: http://v8sho.com/SHO/TSB982310MassAirFlowContamination.htm i'm going to clean it with either maf cleaner or electronic parts cleaner. in that tsb it says if i disconnect the maf connector and take it for a drive and if the problems go away it's contanimated. they say to replace it but i will just clean it. also "DO NOT DISCONNECT THE BATTERY. IT WILL ERASE KEEP ALIVE MEMORY AND RESET LONG TERM FUEL TRIM AND BARO TO THEIR STARTING/BASE VALUES." i've also heard by disconnecting the battery it is a good thing for the computer to reread the values. whats your take on this? > > > > > > > > Don't forget the fuel filter and check/clean the maf sensor > > > > > > > > [quoted text clipped - 32 lines] > other problems. I'm not a mechanic but I have first hand experience > with the dreaded '94 Exlporer. Good luck. > alright i'm going to attempt to clean it today. > [quoted text clipped - 11 lines] > i've also heard by disconnecting the battery it is a good thing for the > computer to reread the values. whats your take on this? I've disconnected and reconnected my batter a few times. I've never noticed a large drop in fuel mileage or vehicle response. I've also heard about this before but don't want to say much more due to my lack of knowledge it. hmm, interesting. anyway, it seemed to be a bit more hesitant, like the timing was off just after i cleaned the maf, but after i took it for a drive, it seemed to work itself out. anyway, hopefully the computer will learn everything the way it should be because its going on a 1200km trip today and tomorrow, and coming back in a couple of weeks. so 2400km.surely it will take some statistics, because before the tune up it only got about 300km (186 miles) on the tank. Thats like 9 miles per gallon. > > alright i'm going to attempt to clean it today. > > [quoted text clipped - 16 lines] > heard about this before but don't want to say much more due to my lack > of knowledge it. Thanks a lot for your help guys! I heard before the tune up and the maf was cleaned, it would get about 320km (198 miles) on 19 gallons of gas. (9 - 10 MPG) Now, the update is 370km (229 miles) on 1/2 tank of gas, which would be 9.5 gallons i suppose. (22 - 24 MPG) Thats highway mileage though, but thats awesome for an explorer! > hmm, interesting. anyway, it seemed to be a bit more hesitant, like the > timing was off just after i cleaned the maf, but after i took it for a [quoted text clipped - 24 lines] > > heard about this before but don't want to say much more due to my lack > > of knowledge it. also, how long would it take to reread the fuel ratings and such? will mileage suck for a while? > > > > > > > > Don't forget the fuel filter and check/clean the maf sensor > > > > > > > > [quoted text clipped - 32 lines] > other problems. I'm not a mechanic but I have first hand experience > with the dreaded '94 Exlporer. Good luck. ok puled the MAF out (didn't pull it out of the tube it sits in) just disconnected it from the filter and the pip and sprayed the filaments through the mesh shield and it seems to run awesome. Starts right off the line. next question, how do you adjust the gas pedal? it seems like i have to touch it a bit more than usual before the revs go up or the engine responds. This problem was there before, or is this normal on explorers? > also, how long would it take to reread the fuel ratings and such? will > mileage suck for a while? [quoted text clipped - 34 lines] > > other problems. I'm not a mechanic but I have first hand experience > > with the dreaded '94 Exlporer. Good luck. My '94 is prone to the quite common "sticky butterfly plate in the throttle body problem". All you do is pull off the air hose from the front of the throttle body and spray the heck out of it with a throttle body safe cleaner. There's a coating on the inside of the throttle body that you dont want to disolve. I also lightly wipe with a paper towel too to get some of the goop off. Concentrate where the butterfly plate contacts the body housing. I have to repeat about every 6 months. dickm >ok puled the MAF out (didn't pull it out of the tube it sits in) just >disconnected it from the filter and the pip and sprayed the filaments [quoted text clipped - 43 lines] >> > other problems. I'm not a mechanic but I have first hand experience >> > with the dreaded '94 Exlporer. Good luck. Yeah, IIRC just remove the rubber tube from the plastic airfilter cover and clean it Do you still have the 1 that is bolted to the lower part or the 1 with the clips ?? Anyway, just make sure it is seated correctly with the new filter element to avoid dirt leaking around the filter > says in my chilton manual that i can disconnect the air cleaner to > throttle body air tube and the air cleaner housing to remove the MAF, [quoted text clipped - 55 lines] > > > > > > > said he changed the spark plugs, what if he didn't gap them > > properly? |
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