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98.5 svt contour. I took the screen off the bottom of the fuel pump and ran the car. Now if I give it good throttle accelerating in first it hesitates badly making the car jerk very hard. Before removal, the car would have hesitating accelerating over 3000 rpm bad not as bad as now. Once I get into higher gears, the car runs smooth. What can be causing this new problem. Also, if the fuel pump is bad, what is a good aftermarket replacement? Thanks.......
98 SVT
89 Mercury Cougar
98 Honda Civic
80 Mazda RX-7
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Originally posted by 1974:
.... Now if I give it good throttle accelerating in first it hesitates badly making the car jerk very hard. Before removal, the car would have hesitating accelerating over 3000 rpm bad not as bad as now. Once I get into higher gears, the car runs smooth. What can be causing this new problem....
Did you change the fuel filter? You may have stirred up some sediment during the screen removal.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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The fuel filter is only a couple monthes old. Do you think it could have been clogged up again this quick? I took the sock off yesterday.
98 SVT
89 Mercury Cougar
98 Honda Civic
80 Mazda RX-7
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I have no life
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I have no life
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Originally posted by 1974:
Also, if the fuel pump is bad, what is a good aftermarket replacement? Thanks.......
It is bad...
http://store.mauromotorsports.com/walbrofuelpump.html
Fuel filter is so rarely the culprit.
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Originally posted by Tony2005:
You may have stirred up some sediment during the screen removal.
Originally posted by 1974:
.. Do you think it could have been clogged up again this quick? I took the sock off yesterday.
Your 8-year-old gas tank may have more sediment than you think. 
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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Read My Post On FSVT Smart Pump How-To. That May Clear A Few Things Up. You Should Also Use That Pump As Your Aftermarket Solution.
CSVT E0 3L
14.5 @ 94mph, Stock Intake, Stock Exhaust minus Resonator, CEL, And Broken Pass. Side CV...Untuned.
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How's the plugs and wires? Can cause misfires and carbon tracks, lurching acceleration.
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Hold the phone.
Your 98.5 does not have the returnless system. Removing the fuel pump screen seldom has any benefit unless you have the returnless system, which did not come into use until mid 99.
The Focus smart pump probably is not an answer for your return system.
Start over. Change the fuel filter. If problem persists, find a fuel pressure gauge to hook up and drive so that you can see if the fuel pressure drops off when it is acting up. If it is, you probably do need a fuel pump (remember to change the fuel filter before testing the fuel pressure).
Jim Johnson
98 SVT
03 Escape Limited
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I like the idea of monitoring with a fuel pressure guage, this seems to be the best way to troubleshoot the problem. What is the best way to set it up to monitor during driving? Also is the Walbro GSS-342 the correct pump for the svt? the link in this thread doesnt say anything about Ford products.
98 SVT
89 Mercury Cougar
98 Honda Civic
80 Mazda RX-7
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Originally posted by FavoriteMystaque:
How's the plugs and wires? Can cause misfires and carbon tracks, lurching acceleration.
Check into this before you play with the fuel system.
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