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Joined: Sep 2002
Posts: 125
CEG\'er
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OP
CEG\'er
Joined: Sep 2002
Posts: 125 |
I just replaced my airbox with a Cone type filter, and the car ran fine. But I put 89 octane in, and now when I rev the engine in neutral, I get a sound from what would be the REV-Limiter; but I am only reving upto 5 grand. It revs, and then just drops of the table, bogs down, and revs up, very weak.
what the hell is the deal, im thinking bad gas or dirty filter.
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Joined: Jan 2001
Posts: 1,025
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Jan 2001
Posts: 1,025 |
-Colter
My Old Car
Current Cars-
1999 Ford Taurus SE 3.0 Duratec
1999 Ford Explorer XLT, my Geocaching car. 
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Joined: Apr 2002
Posts: 974
Veteran CEG\'er
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Veteran CEG\'er
Joined: Apr 2002
Posts: 974 |
OK First couple of things...
What year is your Zetec?
Cold Air Intake (CAI) or just replaced the filter?
Removed the air box or just partial?
Did you reset the computer?
How long has it been doing this?
Gas:
Did you go to a new location to get gas?
OK so there are a few things to look at when making this kind of mod. Number one, reset the computer. This ensures that the computer resets the way it does your mixtures. Number two, once you do that, it is a known fact that the computer will spend some time "relearning" what was "deleted" when you reset the computer or when you made a change. Third, CAI, yes yes yes! Check all your clamps and ensure that they are tight. Check to see that you are not blocking or restricting air flow in. A leak can really cause havoc! Trust me, I know. I started building my CAI and the first time I had it attached to the throttle body, I tested it on the road, and the intake tube at the elbow into to the TB came out. Talk about a LOSS of power and having to LIMP it home....NOOOO FUN......So check all the clamps.
Gas can cause major probs as well. I stopped using 89 and I now use 93 always. Some people say it doesn't make a difference, but I have found that it does seem to run smoother and is a little snappier.
Other things to consider. Remove all the resonators on the intake. The 96's had a "paddle" resonator before the TB and after the IAT sensor AND a resonator in the fender.
I have removed both of those AND the plenum piece that goes over the TB and replaced it with a rubber elbow.
LOVE IT
L8R
Rich
'04 Ecotec Cavi 140hp/150tq Fabbed intake. Header Coming, DRL's disabled, X-Drilled/slotted rotors coming....Man you really are fast. You were hauling a$$ when I passed you
RB&LB
causing problems in Huntsville
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Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
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Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
well I made a trip back from NH on a tank of 89 and then I filled up with 87. I had a sinilar problem with the engine sounding like it was hitting a rev limiter but at very low rpm. It would smooth out a bit over 3 grand but was still rough. it turned out to be the spark plug wires, even though I thought they were fine. still doesn't make much sence to me
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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Joined: May 2002
Posts: 21,653
I have no life
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I have no life
Joined: May 2002
Posts: 21,653 |
our rev limiters in neutral i believe are around 5000rpm
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
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Joined: Jan 2002
Posts: 81
CEG\'er
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CEG\'er
Joined: Jan 2002
Posts: 81 |
around 4500 or 5000..my g/f's duratec kicks in at 4 grand, but it will keep pushing
Teal|'95 'Tour GL|75k|
16V 2.0|Rebuilt ATX|
Factory Euro Mod's (Ordered in Dec '94 From Holland)-|Larger Radiator, Oil pan, Fan, Tank..little things make a difference|
Lots of mods to come....
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Joined: May 2000
Posts: 279
CEG\'er
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CEG\'er
Joined: May 2000
Posts: 279 |
On the ATX equipped cars(at least the ones I've been in)there is a limiter when the car is in 'park' or 'neutral' that kicks on about 4K rpms. I believe it is simply a fuel cut...not sure about the MTX though.
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Joined: Jul 2000
Posts: 3,465
Hard-core CEG'er
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Hard-core CEG'er
Joined: Jul 2000
Posts: 3,465 |
there is no rev limiter o the MTX I ca in neutral rev all the way to 7000rpm
2003 Subaru WRX some mods
Even if you don't have the answer, you certainly have to admire the problem.
aka ZetecRacing
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Joined: Sep 2002
Posts: 3
Newbie
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Newbie
Joined: Sep 2002
Posts: 3 |
Just a quick question how low is your octane rating on unleaded fuel?
In the UK our standard unleaded is 95 octane, Super unleaded is 97 octane and shell Optimax is 98 octane
96 Mondeo
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Joined: Jul 2000
Posts: 3,465
Hard-core CEG'er
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Hard-core CEG'er
Joined: Jul 2000
Posts: 3,465 |
87 89 and 93 are what you see at most gas stations. some will have 91 also
2003 Subaru WRX some mods
Even if you don't have the answer, you certainly have to admire the problem.
aka ZetecRacing
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