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Discussion Starter · #1 ·
93 Escort LX, Sometimes it starts fine, sometimes it starts then stops right away.

The problem has existed for about 8 months. and it's going more and more often now. I have noticed that it starts up fine every morning. Any other time during the day, 50-50.

I have changed fuel filter, spark plugs last summer. air filter was ok when I last checked a week ago. I have cleaned throttle body. Battery is new.

Any idea?
 

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Discussion Starter · #3 ·
Nope. no noise, no smells.
It's just like it can't keep idling. I felt the idle speed was low.

It's like ->
Engine starts -> Idle low -> Engine stalls

or
Engine starts -> Idle low -> Idle high -> Idle low -> engine stalls
 

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well can you keep it running yourself...hold the gas so it idles higher? sounds like your not getting enough fuel/air to the chamber...check intake tubing, and voltage on injectors...if you get crazy have another person keep the car running, and pull the power to one injector at a time, if its the injectors then youll have one or two bad. And if the idle changes when you pull the plug, then that injector is good...got me? oh yea and dont forget to check your TPS
 

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My 91 has been doing something slimalar. When I start it "hunts" for idle and never finds it, high rpm to a low rpm back to a high rpm and sometimes it stalls when it goes to low rpm. I changed the idle air control motor. It is located on top of the intake manafold @ the throttle body. Mine said "ATTENTION Do Not Clean Inside Throttle Body Or Addjust Hard Stop Screw. Special Coating On Throttle Plate And Bore." I got it for 40$ @ the local preformance auto. PT # STD / AC62 IDLE VALVE. I put it in saturday and it has been great since. Hope that helps and let us know if it fixes it.


Grav1ty
 

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siragan said:
Yep, I was going to say the IAC (idle air control) valve. These things tend to be outrageously expensive, so be careful if you try to fix it yourself.
:withstupid:

but...when i first bought my car it would idle like crapolio, and sometimes die. Then me and my brother bought a new ignition coil, installed it and it idled like a champ.
 

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Discussion Starter · #9 ·
Forgot to mention one thing.

It never dies while I'm driving. It idles fine when I stop at a traffic light.
Sometimes the idle speed might be a little bit low, but never stalls.

What I have been doing with the car is everytime I start the car, I try to shift the gear to D or R immediately. Once it's in the driving gear, it will be just fine.
 

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Had the same problem. It's vacuum leak somewhere. Most likely cause if not a bad IAC is old vac lines. I re-vac lined my entire car with silicone hose and it made a big difference. Some of the old rubber lines had holes in them above being cracked and torn 8O

If you don't want to re-vac line the car, you still have to trace all of them out so you can find the bad one. Kind of cumbersome, but it's the only way. Rubber lines tend to wear out, crack, and just overall discintegrate after 10+ years of Canadian climate.

Matt 8)
 

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Discussion Starter · #11 ·
Matt, I agree with you. My car is 11 yrs old. It has got almost 300k. So it wouldn't surprise me if any of those rubber hoses' worn out.
Two questions, how many vacuum hoses are totally in there? Are they all connected to the intake manifold?
Thanks.
 

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There's about 25 feet of vac hose on an LX if you replace everything, including the plastic tubing. More so the plastic tubing (like the kind that runs from the intake manifold to the fuel pressure regulator) cracks and leaks air bad. The only hoses that can't be replaced with all one size hose is the brake booster hose (don't usually wear out) and the PCV breather hose (More common). To do it the quick and easy way, replace the only the PCV hose and connections as I've replaced these a couple of times over the years and seem to go more frequently. Not all of them lead to the intake manifold. There's a vapour line that connects underneath the throttle body, and another from the vapor canister that runs all around. Most of them however run from wherever to the firewall.

Matt 8)
 

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I've got an Escort LX 1.4, same year, same problem. I've been searching the net and have found people solving this by cleaning or replacing their IAC valve all over the place - so obviously I'd like to try that.

Just one problem - where is it?! :lol: Someone suggested under the airbox to me, with one wire attached and in and out tubes but that wasn't enough for me to find it :?
 

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93_escort_lx said:
Nope. no noise, no smells.
It's just like it can't keep idling. I felt the idle speed was low.

It's like ->
Engine starts -> Idle low -> Engine stalls

or
Engine starts -> Idle low -> Idle high -> Idle low -> engine stalls
in order for it to keep running, do you have to apply gas while idling? i had that problem, it was this little valve that sealed the tubing together for the air intake. it was collapsed & was leaking air - all it needed was to be replaced. very cheap and easy to do.
 

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it's the piece that your throttle cable is attached to.

pop your hood, then while your hanging out the door looking under the hood, mash on your gas pedal. It'll be the piece that's moving when you press on the gas pedal.

It's between the intake manifold and rubber intake hose.

edit -

RED - throttle body
GREEN - i'm pretty sure this is the IAC valve (like i said, i'm no 1.9 guru)
 

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Yep.. the IAC is a piece of cake to replace. Did mine in about 10 minutes, and that included the time required to go pick the part up!

oh, and Tito's green circle indicates the IAC valve. :)
 

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Discussion Starter · #20 ·
DeathSlinger00 said:
93_escort_lx said:
Nope. no noise, no smells.
It's just like it can't keep idling. I felt the idle speed was low.

It's like ->
Engine starts -> Idle low -> Engine stalls

or
Engine starts -> Idle low -> Idle high -> Idle low -> engine stalls
in order for it to keep running, do you have to apply gas while idling? i had that problem, it was this little valve that sealed the tubing together for the air intake. it was collapsed & was leaking air - all it needed was to be replaced. very cheap and easy to do.
Yes, Sometimes I had to pump more gas in to keep it idling.
IAC valve is not cheap though, at least not in Toronto. Canadian tire's asking $100 for it. plus tax. makes it like $90 USD. But I got one from a junk yard for 10 bucks. :lol:

To all you guys who are considering cleanning the IAC Valve, Be Careful, Don't use too much those CARB cleanners. According to my experience, it made the problem even worse.
 
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