1.9 hesitates when accelorating

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by donn, May 5, 2008.


  1. donn

    donn New Member

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    I changed the plugs, wires, PVC, a couple of cracked vacuum lines, and thermostat. The engine hesitates when I accelerate...if I light on the throttle its sometimes is fine. I got wires from Kragen and Plugs are Bosch, no gap type.

    Could be running at 55 and have to give it gas, I have to down shift...other wise it will not go.

    Any thoughts!
  2. merctracer

    merctracer New Member

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    get rid of the bosch. they have alotta problems. also you may want to check your igntion timeing. run some fuel injector cleaner. clean your maf and throttle bady to those also may help.
  3. donn

    donn New Member

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    Thanks will do that when I go on Vacation starting Monday.
  4. Lambo_Paul

    Lambo_Paul New Member

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    Same problem

    I have a 1993 Ford Escort Wagon 1.9 liter with the EXACT same problem. I have nice plugs in it. Wires are good, etc... After long trips sometimes the IACV (Idle Air Control Valve) feeds too much air in there and keeps the rpms from coming down very quickly.

    I believe that could be one problem. Anyone think that would fix the problem with the hesitation during acceleration? I also have to down shift at 55 mph if I'm on any kind of slope (even the slightest one). Once I get up to 65 mph I seem to have enough torque to keep it in 5th gear. I really have to baby the throttle a lot when starting off or even acceleration. Any help here would be very appreciated.

    Edit: I've also run cleaners and they don't seem to do much. The question of timing has come up before, but I hear it's costly.

    Edit2: Whoa, I just looked at this diagram

    http://www.autozone.com/images/cds/gif/ ... 1564b7.gif

    and it looks like my car is actually missing both the pressure feedback EGR and the EGR vacuum regulator. I got the car used and maybe the previous owner forgot to replace it or is my car not supposed to have those? There are two open plugs there that would fit the parts I mentioned.
  5. Jonathan

    Jonathan New Member

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    I have the same problem in 5th on the highway, all the other gears are fine, but when I need to get up a small slope, it hesitates. New plugs and wires too.
  6. dellstopescort

    dellstopescort New Member

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    guess i will join the club and say i have the same problem, maybe not as bad as you guys but definitely hesitates i did the fuel filter today in hopes it was my culprit, no success. Although it needed to be done since it was the original
  7. Lambo_Paul

    Lambo_Paul New Member

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    Here is what I've done so far to try and resolve this issue.
    New plugs
    New fuel filter
    Tested the computer and the distributer. Both gave all green lights.

    Looking at replacing the wires, injectors, and IACV (idle air control valve) next.

    I know for certain that there is a problem with the IACV. I don't have the website address on me at the moment, but there was an article by ford about the IACV's going bad. Noticable after long trips, causes the idle to stay high rpm or sluggishly return to idle rpms. Typically this does only happen after long trips, but I don't think it's the culprit for this hesitation... I don't believe the previous owner of my car changed the plugs very often at all. In fact the one that is hard to get to didn't look like it had ever been changed. I now have the V tipped plugs.

    What I think happens when it hesitates is for whatever reason, the fuel to air ratio isn't correct, therefore a piston doesn't fire. Just a theory, and I don't know what would cause that. Might try hooking up a computer to the car to see what it says.
  8. donn

    donn New Member

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    Thanks for all the tips, I did get rid of the Bosch plugs but no change, what it turned out to be was the (3-week old) NEW plug wires I bought from Kragen Auto! I went to Pep Boys and purchased another new set and walla...the problem was gone.

    I was extatic and pissed at the same time...and because I don't have the receipt anymore Kragen won't refund or exchange them either...but that is my fault I should of kept the reciept for longer then a week, but then again I didn't think a new set would of failed in that short time frame...

    Just wanted to let you all know what fixed my 94 Wagon...
  9. Jonathan

    Jonathan New Member

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    seafoaming fixed mine!
  10. graciante

    graciante New Member

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    I ran codes and only got a temperature sensor coolant sensor.

    No codes after replacing the sensor.

    Went after the fuel system. Changed filter & fuel pump screen/strainer. Helped a little.

    Darned if it wasn't the plug wires. I've never seen plug wires misfire with only certain gears and under a load before. It just defies all logic.

    Glad you had this thread going. Fixed ours.
  11. FordMan59

    FordMan59 FEOA Member

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    Many times I've seen cars that seemed to run good until they were put under a load and it be a bad wire or plug.
  12. pell

    pell FEOA Member

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    My 95 auto was doing the same thing. Also hard shifts between overdrive and drive with very little load.(small hill at 40 mph). Thought it might be a tranny problem; but also slow to get going from a stop. So reading this thread I changed the wires out, I can't believe how this car responses to the throttle now and no more shift problems. Thanks guys. :D
  13. taylormah

    taylormah New Member

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    I know it was posted a while back, but donn if you read this post, can you please share the brand name of wires you got from PepBoys?? I was just going to buy wires from Kragen tomorrow, but now I will watch out. Can someone please share what kind or brand of wires I should get or avoid?? Also, I am getting AutoLite XP Iridium spark plugs. Are they any good??
  14. graciante

    graciante New Member

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    I bought Borg Warner plug wires.

    I'm picky about electrical parts for Fords. I had to learn the hard way to watch what brand you buy for a Ford. I've seen some real craziness over the years with generic parts from auto parts stores.

    I prefer to go to Ford and get OEM stuff if it is still made. I do keep the parts guy at Ford entertained. I always call and ask and give him first shot.

    On a bad note. Our Escort got hit by a Yukon in a parking lot. The lady never saw it. She tore the front end up. My husband was parked and sitting in it. :mad: She was cutting through 2 empty spaces to rush near the front of the store for that primo parking spot. I'm pretty sure we have more damage than what the car is worth.

    The car looks like it was bit. Front bumper cover is half gone. Cornering light destroyed. Fender is out of alignment.

    It couldn't have happened before I worked on it?!

    Learn something new every day. Never knew plug wires could behave and then misbehave under load.

    Thanks.
  15. zzyzzx

    zzyzzx FEOA Member

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    Get Rid of the Bosch plugs and get Autoliptes!
    I use APP5144's

    How many likes are on the car? If high mileage, replace the IAC. I replaed mine at 150K, but had I known better, I would have replaecd it earlier.

    You can have vacuum leaks inside devices that use vacuum, bot just the hoses and connectors (and have you checked the infamous PCV elbow).
  16. txescortwagon1993

    txescortwagon1993 New Member

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    Does anybody have a link to vacuum schematic diagram online? The autozone diagrams that folks link to- are gone. Thanks.
  17. txescortwagon1993

    txescortwagon1993 New Member

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    nevermind, I found my autzone diagram I had previously printed, thanks

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