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Joined: Jul 2000
Posts: 235
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Joined: Jul 2000
Posts: 235 |
Does anyone know for the Zetec engine how to adjust the idle speed. Currenlty too low under all conditions, cold, hot, especially with the A/C on. Is this a mechanical sdjustment or does the chip need to be re-programmed?
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Joined: Apr 2001
Posts: 498
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Joined: Apr 2001
Posts: 498 |
You don't adjust it. The PCM controls it.
{I do hate spam, but that isn't really part of my email address. Remove the string ?HatesSpam? from the email address ?BobHatesSpam@blaylock.to? to email me. No advertisements. Spammers will be dealt with very harshly!} ------- Moonlight Blue 1996 Mercury Mystique GS , Zetec engine, ATX. No mods. (Well, OK, one mod. Before I got rid of my previous car, a 1994 Tempo, I swapped radios. I liked the Tempo's radio better. That counts as a mod, doesn't it? I also kept one of my Tempo's wheels to use as a spare. I hate those stupid ?compact? spares that come with modern cars. Does this count as a mod? If so, I guess I have two mods. Replaced burned/melted blower switch and connector on 19 February 2002 with a 1P3T toggle switch from Marvac and a Molex connector from Rat Shack; I guess this now makes three mods.)
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Joined: Sep 2000
Posts: 1,969
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Joined: Sep 2000
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Its a little like chasing a ghost...
Some people have had success with the following upgrades:
Spark Plugs
Spark Plug Wires
Accel Coil
Chip
Of course if there is something wrong/ broken in the first place these may prove to be ineffective. This is a known issue on almost all zetec tours and it is normal for lack of a better term...
Kharma is very real and she is one mean b!tch.
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Joined: Jun 2000
Posts: 2,246
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My idle is like that too. The car will hesitate. So I thought it was my plugs so I changed them (same time I did my exhaust) and it didnt work. Thought my exhaust was leaky, fixed it, still a problem. Now I think it may be the wires.
David Litsky AIM: DaveL225 My Car
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Joined: Jun 2000
Posts: 2,848
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Joined: Jun 2000
Posts: 2,848 |
there is an "idle speed control" I had the same thing. The car would surge, idle a little too high, or sputter and stall when putting it into gear. NEver got it fixed, but i'm told that's the code they were pulling from the computer. FYI it was a 95.
1999 Silver Frost SVT
#609 of 2760
Born on 12/3/98
KKM Intake
Removed Resonator
35% Window Tint all around
Tinted Tail Lights
ElKy Mesh Grilles
HID
Dyno'ed at 175.3HP/155.5TQ
"How much must I live through just to get away..."
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Joined: Apr 2001
Posts: 304
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Posts: 304 |
There are a lot of things that affect the Zetec idle stability and even when perfect its not that smooth
Idle Control valve (if your car drops to 1000 rpm on lift of and then to 850 when staionary this is working
Throttle Position Sensor
Exhaust Gas Pressure Differential Sensor (tuns on and off EGR valve, fails and leaves EGR on at wrong times)
EGR valve. Sticks open, clean it
Rubber T piece below coil splits easily and is a vacuum leak (Very Common)
Pulse Air Injection system. Sticks open after warm up
HT leads break down very easily
Too large a spark gap. Try 1mm its a lot better
Crankcase Breather valve, Stalls the engine when blocked
So you have a lot to check
Mad Mole Visit Mad Moles Mondeo Madness 2L Zetec, Cams, Stage 2 head, Valve work, Powerflow, Unichip, AEM Ram, K&N, Ecotek, 75mm Lower etc. 192 BHP, Faster than a speeding Duratec!
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