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#474551 11/06/02 06:17 AM
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Whenever I start my car and just go my car act's like it is going to shut off on me. It drives fine but when i stop at a light it does this thing the the car's rpms go down and then back up as if to stay on. What can be the cause of this how can it be fixed? I was told it's the fuel filter needs to be changed. any comments can help please.

95 contour 2.5 V6 90,000 mi
In New York
it's about 50 degrees

Thank you


95 Contour SE Champaign MODS. 9mm Ford Motor Sport Plugs
#474552 11/06/02 06:43 AM
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I have the same problem when I pull up to stop lights and I changed my fuel filter but that didn't help it at all. So any suggestions that somebody may have will help. Please.


98 SVT 18" Enkei RS6's, NITTO 555 Extremes Intrax lowering springs K&N filter Sho-Shop Y pipe (without cats) Stock "gutted" manifolds Carbon Fiber Cowl hood Carbon fiber sail panels
#474553 11/06/02 07:56 AM
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Look very carefully for vacuum leaks around the PCV valve.
The EGR valve could be staying open.
The MAF could be dirty and affecting mixture.
The IAC may be sticking.
A temperature sensor may be bad.
Could even be plugs and wires.
IMRC stuck open affects cold starts and power.

Basically you have to rule them out one at a time.
If the engine has not yet been serviced for intake cleaning, it's about time it was.


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#474554 11/06/02 11:53 AM
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Originally posted by Rogerm60:
Look very carefully for vacuum leaks...


Agree.

The brake system is hooked into the vacuum system. When you apply brakes, if you have a leak, the vacuum in the engine will decrease and possibly stall the car.


96 Contour SE Duratec V6 24-valve 2.5L ATX 108,000 mi. Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
#474555 11/06/02 07:49 PM
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how often should the intake be cleaned, i've had my cleaned about a year ago at sentry south when bill jenkins was there.


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#474556 11/06/02 09:56 PM
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I had the same problem and had a dirty MAF, but I was throwing a CEL. I had both O2 sensors replaced, still got CEL, cleaned MAF, all was better.

If you are getting a CEL, clean the MAF.


'97 Mercury Mystique GS (Not mine anymore...) Now running a Toyota Matrix XR Red, 16" wheels, Sunroof, VVT-i
#474557 11/06/02 10:53 PM
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My car was doing the same thing, I replaced my O2 sensors and it went away... Might want to clean your throttle body too, I have heard a dirty TB will cause the same problems.


~*TJ*~ 97 GL Sport Zetec MTX ~*RIP*~ Connie~*1/21/02* Sold the Zetec, now the prouud owner of an 01 VW GTi VR6 - Sold the GTI now have 97 Mustang Cobra
#474558 11/06/02 11:36 PM
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Intake cleaning interval depends on the amount of engine blowby, type of oil, and driving conditions. Excess heat and blowby cause intake to gunk up and even new engines have varying ammounts of blowby. The interval shortens at higher milage and if the oil seperator under the LIM is gunked up. Maybe 70k - 100k first time depending on if it's causing a problem.


"Those who cannot remember the past are condemned to repeat it" -George Santayana

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