1999 Ford Escort Power decrease/hesitation, very strange pr

Tiny
CHIEFSFANTOM
  • MEMBER
  • 1999 FORD ESCORT
Engine Performance problem
1999 Ford Escort 4 cyl Front Wheel Drive Automatic 127k miles

Recently had problems with car losing power while driving. Started when summer weather hit (heat). Never did it during the winter. While driving a little bit, maybe a few miles, it would start losing power, but never would die. Car would get slower and slower but every second or so, but it would push forward a little bit, going about 20 mph. After that I changed the fuel filter, plugs, wires, and the catalytic convertor. Ran fine for about the past month. Temperatures outside weren't high though. Within the past week temperatures have risen to 90's/100's and the car has started this behavior again. Car never get's too hot, internally. It has plenty of coolant and never overheats, all other fluids are full as well. After about 11 miles of driving it starts to act up. Vehicle behaves worst when going up an incline/hill. I can barely go over 20 mph when it does this. I test drove it today, and went through backroads with plenty of hills, vehicle performed greatly and ran smooth, I get back to my house and decide to make the run again, with inferior results. Car slowly crawling up the hills I had cruised over only 10 minutes prior. Best part, if I turn the car off, and turn it right back on, it runs like a champ. Today when I made my second run, when it was losing power on this steep hill, I put it in park, turned it off, turned it back on, and drove right up it without incident. Car is hesitant on flat roads as well, but I can maintain 40-50 mph, but I can feel it hesitating ever other second. Also the mpg I get it crazy with this problem. Last few weeks, I've gotten pretty good gas mileage. When I fill my tank up, the arrow goes a little bit above the full mark. I have been making 100 miles easily before the arrow reaches the full mark. Now with this problem, I filled up the tank. It read above full like usual, and I've driven 94 miles and I'm at an insane 3/4 tank!
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Saturday, June 5th, 2010 AT 11:42 PM

3 Replies

Tiny
RASMATAZ
  • MEMBER
Did you get a check engine light on prior to this problem and when was the last tune-up?

Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard.
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Sunday, June 6th, 2010 AT 6:12 AM
Tiny
T-BONE ORIGINALS
  • MEMBER
I have the same problem as chiefsfantom. Has anyone figured out what fixed this condition. I have replaced over half of these things and no change. Help!
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Wednesday, March 30th, 2011 AT 2:17 PM
Tiny
CHIEFSFANTOM
  • MEMBER
I forgot that I questioned on here. I ended up fixing it. Hopefully your problem is the same cuz it shouldn't be to difficult, well I say that, but have a wide variety of backup parts and tools. Well, my escort was doing this and we had no idea what the hell was going on to cause this problem. I put a new head on the motor when I bought it because that's what it needed. I only drove occasionaly with this escort over the winter because I prefer my truck in snow. I decided to take the head off and check that along with fuel injectors. This head was new and when I took it off, it looked like it had 150,000 miles on it easy. Where the fuel came in looked like and felt like varnish, completely gunky and took forever to clean the crap off. I then knew it had to be the gas/gas tank. I pop the back seat up and check out the fuel pump, and man did that stuff stink, it smelled so bad. I'm not sure how old, or what this lady had in her gas tank, but man it shouldn't have been in there. The filter on the fuel pump were caked with this dark brown residue and the motor in the fuel pump was pretty much locked up and hardly working. I ended up dropping the fuel tank and putting a different one in along with a different fuel pump and everything has worked fine since then.
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Saturday, April 9th, 2011 AT 11:34 AM

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