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rev problem 

 

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 Post subject: rev problem
Posted: Tue Jun 02, 2009 8:07 pm 
Getting Side Ways
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Ride: ef falcon, el fairmont ghia

Location: Christchurch
New Zealand

Hi im hoping someone can help me here, ive done a search but none of the topics were finished... (never said what prob was). anyhow the cars a 4speed auto 3.9L. it doesnt seem to want to go over 3500rpm when it hits around there it acts like its at top revs shatters ect. i change gear manually when passing as it doesnt kick down properly. i've had it a few months it was real sluggish when i got it has it was sitting around. so i changed oil, plugs, leads, and filters. running alot better but still wont rev out like it should so am a lose of power. my old ea would do 180 easy as( i backed off after that) ive only got up to 160 in this took a bit too, tho was up hill.

has anyone had this prob before? dont really wanna go buy a fuel pump or something and find out it was waste of money
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 Post subject: Re: rev problem
Posted: Tue Jun 02, 2009 8:10 pm 
Fordmods Junkie
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VIC, Australia

have you checked the timing?

 

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 Post subject: Re: rev problem
Posted: Tue Jun 02, 2009 8:16 pm 
Getting Side Ways
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Joined: 30th May 2005

Ride: 1993 EB XR8

Location: BrisVegas
QLD, Australia

Is your cat converter clogged?

 

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 Post subject: Re: rev problem
Posted: Tue Jun 02, 2009 8:20 pm 
Getting Side Ways
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Age: 34

Posts: 1166

Joined: 31st Mar 2005

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Ride: ef falcon, el fairmont ghia

Location: Christchurch
New Zealand

i figured the timing was ok seeming it idled fine but no i havent.
has no cat im in nz dont gotta have them, only has one muffler got the other 2 cut out about 2 months ago
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 Post subject: Re: rev problem
Posted: Wed Jun 03, 2009 3:05 am 
Getting Side Ways
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Age: 38

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Ride: 66 Coupe

Location: Perth
WA, Australia

check the accelerator cable?
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 Post subject: Re: rev problem
Posted: Wed Jun 03, 2009 8:44 am 
Fordmods Junkie
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Ride: EL Fairmont, VFR400 racer

Power: 144 rwkw

Location: Melbourne
VIC, Australia

Check your air intake system. Air filter might be stuffed, get it cleaned or get a new one.

As 66 coupe said, accelerator cable...make sure it isn't stretched or caught on something.

Check for vacuum leaks.

That's all I can think of besides fuel system and MAP sensor, but those would usually cause the car to have a rough idle and also misfire/surge/jitter when driving under load. While you're at it, replace the fuel filter if the car has been sitting for a while. Might be clogged.

Hope that helps.

phong =P~

 

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 Post subject: Re: rev problem
Posted: Wed Jun 03, 2009 11:08 am 
Getting Side Ways
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Age: 34

Posts: 1166

Joined: 31st Mar 2005

Gallery: 2 images

Ride: ef falcon, el fairmont ghia

Location: Christchurch
New Zealand

cable seems ok, air filter looks ok but maybe pretty old could a clogged filter cause it to act like its on rev limiter? fuel filter done. i'll check for leaks in the weekend and get back to ya.
the Exhaust note sounds a lil lumpy but has factory cam, that normal?

im gonna replace engine anyhow not sure what with yet?
but it be nice for this to run better for now
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 Post subject: Re: rev problem
Posted: Wed Jun 03, 2009 12:36 pm 
Fordmods Junkie
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Ride: EL Fairmont, VFR400 racer

Power: 144 rwkw

Location: Melbourne
VIC, Australia

clogged air filter can cause power loss...how much I am unsure of. You're basically choking the engine, so it won't perform very well. I'm sure that's a general rule for anything that needs to breath.

phong =P~

 

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phongus = Post whore 2006
EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

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 Post subject: Re: rev problem
Posted: Wed Jun 03, 2009 1:56 pm 
Smokin em up
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VIC, Australia

I'd go with the fuel pump. My dad had an ea that was a bit sluggish and wouldnt rev very high, the new fuel pump fixed that up. You could try doing a test of the fuel line to see how much fuel its deliverying and then try the fuel pump if it's low.

 

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