1997 Ford Explorer performance

Tiny
RAMDIK11
  • MEMBER
  • 1997 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 132,000 MILES
I recently purchased this 97 ford explorer, and had the transmission rebuilt. I changed the plugs, the fuel filter, the battery, the egr control valve, 1 pre catalyst oxygen sensor.( Because the check engine specified that one). Cleaned the throttle, changed the oil, and put a bottle of fuel injector cleaner in. I recently took a trip through west virginia. And it's a lot of highway up and down pretty steep hillside. When i'd be flat or coming down a hill. No problems, decent acceleration, and decent power. Enough anyway. Uphill, is a totally different story. If I act like an 18 wheeler and get up enough speed and don't have to let off the accelerator or brake as i'm going up, no problems. But on my way up, if I have to let up on the accelerator even a little bit, or god forbid press the brake pedal, maybe if some one is going too slow, or cuts in front of me, and then try and reaccelerate, no go. I basically have to floor it, and even then it will just kind of feel like it's hanging in limbo. No acceleration, no power. The rpms will kind of just sit still almost, and then sometimes they will rev really high like 3.5 rpms. And it will kind of punch or kick. And then I can accelerate. Then I can let the pedal off the floor at least. But that doesn't happen all the time. It seems it depends on how much I had to slow down. If I have to slow down too much. It seems the chances are less that this will even happen. Like 3 or 4 times on this trip I floored it with no response at all. No rpms reving up. And no punch into power. Can you help me?
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Sunday, May 31st, 2009 AT 10:00 PM

5 Replies

Tiny
RACEFAN966
  • EXPERT
Ok what all have you checked so far? Do you have a digital multi meter to do some testing on a couple of sensors? I would like to test the coolant temp sensor and the tps. Have you cleaned the mass air flow meter? If not then get some mass air flow cleaner (nothing else) and clean that. Get back to me
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Monday, June 1st, 2009 AT 9:11 AM
Tiny
RAMDIK11
  • MEMBER
I don't have any testers. Can I bring that to a garage to have that stuff tested. But now that you mention the coolant temp sensor. My gauge on the dashboard always reads way below the normal level. Like the car is running way too cold. And that's all the time. It doesn't sometimes even come up off the bottom. If I run the ac. Then it comes up a little bit. But never the middle. Which would be normal. Would that affect how the car runs?
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Monday, June 1st, 2009 AT 10:24 AM
Tiny
RACEFAN966
  • EXPERT
Yes you could take it to a garage. But you mentioned the temp not getting up to normal. Have you had that checked out if the car is not getting up to temp this can cause many issues even poor MPG. It may be that the temp sender is bad and not sending the right signal or it could be that the thermostat is stuck open and it just isn't getting up to temp. I would have this checked and fixed before going any further as I have said this can cause problems as the car will alway's think it is cold and not run as it should. Let me know what you find and how it goes.
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Monday, June 1st, 2009 AT 10:34 AM
Tiny
RAMDIK11
  • MEMBER
Ok. I had the temp sensor and the temp sender changed, and I had the maf cleaned. It seemed to be ok. But i'll drive it a few days yet and let you know. So far the temp gauge is a little better, it comes up off the cold mark at least, but it still doesn't go up to the normal area, near the middle. But my mechanic said it can't be the thermostadt because I have heat right away when I start the car.
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Monday, June 1st, 2009 AT 9:09 PM
Tiny
RACEFAN966
  • EXPERT
Ok I would still check the temp of the engine when warm with an infered thermometer just so you know for a fact that the engine is getting up to full operating temp. A vehicle can get warm and warm heat but not get all the way to temp. It is just for peace of mind.
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Tuesday, June 2nd, 2009 AT 10:41 AM

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