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Author
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Topic: need help asap
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dzznuts
Journeyman Posts: 48
From: oakville, ont, canada
Registered: Apr 2002
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posted 04-02-2004 01:16 PM
   
im having some real problems with my winterbeeter (just so you know i have a 70 mav for the summer). It is a 86 grand marque with the completely stock 302. The problem is a bit complicated..or so i think anyway. if you start the car in the morning, or after it has been sitting for a couple hours it will run perfectly. However if you shut the car off for a couple min (anything under about 3 hours) when you start the car again, it runs at a normal idle, then almost dies, sometimes knocks, the run then almost dies, each period lasting for a couple seconds each. if you stomp on the car it will go. if you easy on the gas it will either stall imediately or go but when it goes the engine is still doing its running then nearly stalling routine so at every light it looks like my first time driving stick shift (even though its a automatic). At the begining of the winter i replaced the cap, rotor, plugs, and the fuel pressure regulator.
any help here would be a huge help!!
thanks a bunch
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Moneymaker
Administrator Posts: 26813
From: Lyons, IL, USA
Registered: May 99
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posted 04-02-2004 05:02 PM
Sticking or plugged up EGR.
Remove and clean or replace. Don't forget to clean out the passeges.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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dzznuts
Journeyman Posts: 48
From: oakville, ont, canada
Registered: Apr 2002
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posted 04-02-2004 07:28 PM
the problem got a bit worse today, with the pedal to the medal, the car was only doing 20km/hr. i pulled into the nearest lot where i could leave to car, and the thing was billowing smoke. i looked under the car, and the cat's were glowing red.im going to pull off the egr tomorrow. how do you clean it though? just in varsol? do i need to buy a new one? times are a bit tight and if i could save 150 bucks right now i would be very happy.
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Bluegras
Journeyman Posts: 64
From: Easton,Pa.
Registered: Nov 2001
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posted 04-03-2004 12:50 PM
Over heated cats is a sign of to much fuel being burned in the exhaust and the air injection pump adding air on top of it..
You need to get a code reader and output the codes to get a start on the problem.
EGR will not cause anything but rough running if stuck open but in this case the excess fuel may have something to do with it.
The EGR if not stuck open, only opens during cruise conditions at about 2000 to 2400 rpm and relitivly steady throttle positions.
Since you already changed the fuel regulator, I would be looking at bad injectors hanging open or possibly an open coolant sensor that the EEC reads as a very cold condition.
Some of the reactions you are getting is the EEC going into and out od
of limp mode operation, advancing timing as a normal response to the fault.
You should be seeing a check engine lamp.
Over heating the cats to that extent too often will damage them beyond their use. A red color seen in day light is a temp. of well over 900 degrees and can set the car on fire as well a damage wiring and other soft item near by. The cat shell outer guards are stainless steel for that reason.
Good luck.
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dzznuts
Journeyman Posts: 48
From: oakville, ont, canada
Registered: Apr 2002
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posted 04-03-2004 07:33 PM
What do i do if im not getting a check engine light??
i went down to my local parts store and was told that a code reader wont return any data if the check engine light isnt on.as for the egr, it has no carbon build up and is moving quite well.
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Moneymaker
Administrator Posts: 26813
From: Lyons, IL, USA
Registered: May 99
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posted 04-04-2004 12:54 PM
The processor stores hard codes.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
Bluegras
Journeyman Posts: 64
From: Easton,Pa.
Registered: Nov 2001
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posted 04-06-2004 01:11 AM
If the check engine light does not come on at prestart, the lamp is out.
As for codes, they are stored if the fault results in the EEC having to sub a value in memory. Any past faults that may have been stored are still there unless the battery was disconnected 10 min or more.
You have trouble signs so the computer has to see it if it is coming from the motor where the Oxygen sensors would detect the rich condition and report it as a fault.
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dzznuts
Journeyman Posts: 48
From: oakville, ont, canada
Registered: Apr 2002
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posted 04-07-2004 12:34 PM
the only code reader that i could find locally was going for just over 2 hundred, so i took the car to ford, and they found that the throttle position sensor was gone and that i had quite a bit of carbon build up.
Is there a difference between the fuel system flush that the dealership will do and the fuel additives you can buy (apart from about 120 bucks that is)? which fuel additive workd best?
thanks for everyones help.
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SteveLaRiviere
Administrator Posts: 44935
From: Saco, Maine
Registered: May 99
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posted 04-07-2004 05:44 PM
The main difference is the stuff at the dealership actually works.  ------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
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