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Nezerconezer
CEG'er

Reged: 07/04/06
Posts: 65
Loc: PHX AZ
SVT High RPM Full Throttle Problem
#1305026 - 08/23/06 06:19 AM

A nice little problem decided to come up today. Was accelerating up an on ramp at full tilt in 2nd gear. When I got over 4500 RPM the power flow became very uneven. Just drove in it again and is still having the same problem. Its not dramatic but it is pretty substantial, you can definitly feel it. Any ideas?

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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
Re: SVT High RPM Full Throttle Problem new
#1305037 (Re: Nezerconezer) 08/23/06 10:58 AM

Three things come to mind.

IMRC acting up so that the secondaries are fluttering.

Fuel supply restricted so that it's running lean at high RPM and heavy load. Plugged filter or weak pump.

Ignition miss from weak ignition from worn plugs, leaking plug wires, or weak coil.

--------------------
Jim Johnson
98 SVT
03 Escape Limited

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Nezerconezer
CEG'er

Reged: 07/04/06
Posts: 65
Loc: PHX AZ
Re: SVT High RPM Full Throttle Problem new
#1305049 (Re: Big Jim) 08/23/06 11:36 AM

How would i go checking these things?

Heres some more info, just incase it would help.

Recently put a new sound system in it, 700 watt amp.

52k miles

Premium fuel only.

Just rained yesterday.

Have a AES SRS intake on it.

Edited by Nezerconezer (08/23/06 12:00 PM)

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Tony2005
Addicted CEG'er

Reged: 06/19/05
Posts: 5345
Loc: Virginia, USA
Re: SVT High RPM Full Throttle Problem new
#1305099 (Re: Nezerconezer) 08/23/06 01:44 PM

Originally posted by Nezerconezer:
How would i go checking these things?

...




1) Disconnect the sound system and see if it helps.

2) Change fuel filter.
Lots of How tos in Duratec Maintenance FAQ

3) Revved the car above 4K and see if the IMRC lever moves.
IMRC test

4) Have fuel pressure tested at a shop.

5) Check/change ignition system (coil, wires, spark plugs).
Coil from Autozone. Spark Plug and wires from Duratec Maintenance FAQ

--------------------
"Always do the cheap and easy ones first."

1996 V6 ATX 96K miles


Edited by Tony2005 (08/23/06 01:56 PM)

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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
Re: SVT High RPM Full Throttle Problem new
#1305576 (Re: Nezerconezer) 08/24/06 03:43 AM

Important new information. The new intake.

Combined with hot weather that may be your problem. If you are feeding the engine hot under hood air that could explain your problem. You need to have the intake inlet where it gets cold air or you need to create a hot air dam.

You may find more with a search on such topics as "hot air dam", "hot weather power loss", " or "cold air intake". One of the veterans here made his hot air dam from an old plastic trash can lid.

--------------------
Jim Johnson
98 SVT
03 Escape Limited

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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
Re: SVT High RPM Full Throttle Problem new
#1306964 (Re: Big Jim) 08/26/06 05:32 PM

Did you figure anything out yet?

--------------------
Jim Johnson
98 SVT
03 Escape Limited

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