Engine - 1.9 ruff idle | Ford Escort Owners Association (FEOA)

Engine 1.9 ruff idle

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by 93 green wagon, Apr 10, 2016.

  1. 93 green wagon

    93 green wagon FEOA Member

    Messages:
    17
    Likes Received:
    2
    Trophy Points:
    13
    93 1.9 runs great. Have rough idle when in drive, have replaced both trans mounts front and back. Idle in drive on brake by factory tach is 550rpm. should it be more? Shakes likes real bad!!
  2. zzyzzx

    zzyzzx FEOA Member

    Messages:
    14,727
    Likes Received:
    1,099
    Trophy Points:
    463
    Location:
    Baltimore, MD USA
    Did you check for vacuum leaks:
    Did you check the PCV system?
  3. 2 LX4s

    2 LX4s FEOA Member

    Messages:
    20
    Likes Received:
    10
    Trophy Points:
    3
    Location:
    Calif.
    If its shaking really bad, its makes me wonder if its running on all 4 cylinders. How long has it been idling rough? How's the gas mileage?
    zzyzzx likes this.
  4. LariRudi

    LariRudi FEOA Donator

    Messages:
    2,341
    Likes Received:
    219
    Trophy Points:
    313
    Did it get better or worse when you changed those mounts? These are inherently rough on the idle, and if it's REALLY bad, there is a TSB on it's "fix", and is in these forums. Of course you MAY have an ignition or other problem too, but you are not the only one to report a situation like this.

    I know somebody might "nail" me on that comment "inherently rough idle", so forgive me, please as no offense is intended. All I've got or had in Gen 2's are 5 speeds, but I HAVE driven other "Ford/Mercury" BRAND NEW [4 cyl] that are much rougher on the idle than the manual shifts.

    Ford recognized this and put out the TSB's.

    Good luck,

    LarryR
  5. 2 LX4s

    2 LX4s FEOA Member

    Messages:
    20
    Likes Received:
    10
    Trophy Points:
    3
    Location:
    Calif.
    Neither one of mine idle rough. One is an auto and one is a 5 spd. Maybe mine were fixed by the dealer before I got them. I wonder what the "fix" was.
  6. Pizzaman5000

    Pizzaman5000 FEOA Donator

    Messages:
    1,461
    Likes Received:
    436
    Trophy Points:
    183
    Location:
    Central OH
    If idles fine under no load, but really low under load... IAC?

    Mine runs great, I do consider it a "bumpy" idle. More like a dog growling at the end of a chew toy. I don't want to get into the idle roughness debate right now lol
  7. EatChevy

    EatChevy FEOA Member

    Messages:
    37
    Likes Received:
    5
    Trophy Points:
    8
    Location:
    Amarillo
    I have a 93 wagon that sounds a lot like the same problem, mine was a combination of different problems.
    that was partly caused by the surge valve sticking causing problems idle and power ,but mine had a lot of Back pressure in the fuel tank when ever the purge valve would be stuck closed ,then when it opened a lot of gas vapor rushed from the gas tank through the purge valve to the intake manifold and made the engine running away for about 10 seconds at a time,the charcoal canister was just a empty canister something or someone destroyed it before I bought the car last year. That problem took me awhile to find.
    The idle control valve inside of the unit was in two pieces, replaced it,the PCV stuck closed caused to much crankcase pressure and forcing blowback to gum up throttle body, I overlooked the obvious on that one for a couple of days. Now it's running pretty good but at times at idle the thing would be perfect at times and other times it would rattle shake and sometimes die and would have low power like the car was going to give it up , take 2 blocks to get up 40 mph. Then it would start running perfect again, no problem at all. Of course when I had time to work on it the car would be fine.
    Finally I installed a new timing belt kit, that included tensioner, idlers, water pump, everything that is in contact with the timing belt. It's been running perfect now for a few weeks, the best it has done since I bought it.
    I think the timing belt was jumping around, stretching, something there was going on causing the problem.
    Long story, but now my 400 dollar car runs great, we'll my sons 400 dollar car. He got a ticket for 84 mph.in a 70 mph. Zone. So it's costing him more than me...
    Anyways, don't know if all this is any help, I hope it is somehow.
    If you have good engine compression and fuel pressure, go for it.
    I forgot one of the most important thing that helped the idle the most was the water temperature sender for the computer, not the gauge, sender for the computer ,it controls a lot of the timing and fuel delivery system.

Share This Page