I have a '97 escort with a 2.0 SPI, auto trans. 113,000 miles. Recently and frequently the service engine light comes on with a code for cylinder #4 misfire. Replace plugs and wires, ignition coil, along with fuel filter, air filter, purge flow valve and sensor, PCV valve and tube and some vacuum lines. No coolant in plug hole or visible leak anywhere. No smoke coming out exhaust and no smell either. Still every couple days the light comes on with #4 misfire. Fuel pressure checks good, compression checks good. I work at a Ford dealer and have had all the tests run and checks good. Myself and the mechanics are stumped. We're thinking possible valve sticking on #4. Intermintent rough idle and misfire re-occur. Today the car "surged" a little on acceleration (almost like the processor was debating kicking in or out of overdrive) and once again the light is on. I haven't had the code pulled yet but I'm assuming #4 misfire. Any insight or thoughts? The valve cover is leaking a little but not enough right now to be concerned. Any input is appreciated!
Not a lot left, is there?! If it was a sticking valve, you'd get a tappet noise from the engine with the increased valve clearance, I'd have gone straight for a coil pack with this one, do you still have the old one? If there's signs of black burns underneath, the thing may have blown and taken the PCM down with it... only other option is duff injector. My money's on the former, sorry...
Yeah, I have the old one. I did the sea foam cleaning last night and it seemed to help some. But today my daughter said it's not accelerating properly and the light kicked again. I'm totally stumped now!
I Have a 97 Escort wagaon that had the EXACT same problem has this one. Did you ever find out what the problem was. Mine runs fine for awhile then it starts missing, the service engine soon light blinks then stays on steady, after a few miles or when you push hard on the acclerator it goes away for a day or so then does the same thing. Always says num. 4 cyl. misfire. It's had new plugs, 2 in num. 4 cyl. New wires all new filters, injectors cleaned, throttle body cleaned, 2 new valves that have something to do with the charcoal canister, Delar put in new coil but it happened to be acting up while he had it and it was still missing with the new coil so he put the original one back in. Any thoughts?
Somebody on another board told me this; He had a 97 Escort with this same problem. It turned out that the valve seat for 34 cyl. came loose in the head. Has anybody else hhad or heard of this problem? Is it common with Escort's?
I removed the injector manifold and was going to replace the #4 injector only to get it all removed and the connector on the replacement injector was different. So I re-assembled the manifold with the original pieces and have yet to have a problem. No more lights, no more problems, runs good. You may want to give it a try. Also, I used a product called Sea Foam. That seemed to help the way the car ran and idled. May be something to think about too.
i have a escort '97 wagon and the engine light come on with the code p0420 but the engine have a misfire like your i'm going to use the seafoam, a change the two sensors, the cat, spark, maf, plug, and it fails still there,
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