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Acceleration Issues


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mrrko
Novice

Jan 20, 2010, 6:57 AM

Post #1 of 10 (2952 views)
Acceleration Issues Sign In

2002
Ford
Escape XLS
V6 Engine
100,000+ Miles

After a inspection, took the car on the road and the EGR Valve Blew out with a hole in the side of it. I was also running on a Engine with a misfire. We fixed the misfire and also replaced the EGR Valve and the EGR solnoid. so when applying gas, the car gives little to no power, flooring it still gives about 20mph. Any idea what that may be?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 20, 2010, 7:40 AM

Post #2 of 10 (2950 views)
Re: Acceleration Issues Sign In

Guess and I hope you fixed all the damage from this "blow-out" with a hole! If you drove that any significant time with a misfire you may have clogged up converters which would cause loss of power. For now I'd check for exhaust restriction,

T



mrrko
Novice

Jan 20, 2010, 8:31 AM

Post #3 of 10 (2945 views)
Re: Acceleration Issues Sign In

sounds like a good solution to me, I will take a look at the catalytic converter. Its possible. I will get back to you on that information. thanks alot


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 20, 2010, 8:52 AM

Post #4 of 10 (2939 views)
Re: Acceleration Issues Sign In

If you don't know how to check for exhaust restrictions or excessive back pressure hit back. Just looking will mean nothing,

T



mrrko
Novice

Jan 20, 2010, 10:34 AM

Post #5 of 10 (2933 views)
Re: Acceleration Issues Sign In

Yes I would love some guidance on how to check. I appreciate the help.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 20, 2010, 11:09 AM

Post #6 of 10 (2929 views)
Re: Acceleration Issues Sign In

Couple ways but start with an easy one:

Put a "T" in a known actual intake manifold vacuum line. Hook that up to a vacuum gauge and unless very high altitude it should read about 18 +/- . Now hold idle (no load) at 2,000 and it should read the same as at idle. If not there's a restriction but doesn't tell you where. Converters are the most likelyUnsure but you don't know for sure.

Another test is to loosen exhaust before converter(s) and go for a quick drive. Noisy, but if power is up to par again it seriously points to restriction.

Start with the first and see what you find,

T

PS: This is a fav tool of mine. Both a vacuum pump for testing things AND has stuff to put in lines with the gauge! Voila!





(This post was edited by Tom Greenleaf on Jan 20, 2010, 11:21 AM)


mrrko
Novice

Jan 20, 2010, 11:24 AM

Post #7 of 10 (2923 views)
Re: Acceleration Issues Sign In

Thanks for the information. I will try these steps as soon as possible and let you know the outcome.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 20, 2010, 11:27 AM

Post #8 of 10 (2922 views)
Re: Acceleration Issues Sign In

Oh - look back as I added a pic of a neat tool I like that's handy for this that you might have missed,

T



mrrko
Novice

Jan 20, 2010, 11:39 AM

Post #9 of 10 (2917 views)
Re: Acceleration Issues Sign In

What do you think about these
  • P1400 Differential Pressure Feedback Electronic Sensor circuit Low Voltage
  • P1401 Differential Pressure Feedback Electronic Sensor circuit High Voltage


  • Could any of these be the cause for the no acceleration?


    Tom Greenleaf
    Ultimate Carjunky / Moderator
    Tom Greenleaf profile image

    Jan 20, 2010, 11:43 AM

    Post #10 of 10 (2915 views)
    Re: Acceleration Issues Sign In

    That suggests what was suspected but know I'm retired and don't have the charts for what each code means nor exactly what it's trying to say. Post just those code #s like you just did under the section "Trouble Codes" or whatever we're calling it now,

    T







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