start and cutoff

Technical Tips, Tricks and Q & A
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vinchez78
'93 Cobra Luhva
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Re: start and cutoff

Post by vinchez78 »

Z282SLO wrote:
vinchez78 wrote:Well... It's doing that shit again :cussing: :cussing: think it could be the IAC? And what exactly does that do??
The attached may be of help to you, Vin. Good luck.

http://www.ehow.com/list_7219549_signs- ... valve.html
Thank u Z, that was very helpful, think its time for a new IAC!!
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Romo93
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Re: start and cutoff

Post by Romo93 »

vinchez78 wrote:
Z282SLO wrote:
vinchez78 wrote:Well... It's doing that shit again :cussing: :cussing: think it could be the IAC? And what exactly does that do??
The attached may be of help to you, Vin. Good luck.

http://www.ehow.com/list_7219549_signs- ... valve.html
Thank u Z, that was very helpful, think its time for a new IAC!!
Vincent - did the IAC fix the issue?
1993 Black / Black Cobra #3929. V3 with a couple bolt-ons - 63,000 miles and counting....
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vinchez78
'93 Cobra Luhva
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Re: start and cutoff

Post by vinchez78 »

Haven't had a chance to order one yet, I think it might ignition related, I've noticed that when I turn the ignition all the way up, it will crank, start then cutoff,happens mostly in the morning when its cold, but then if I turn the ignition then turn down just slightly it will act like it will cutoff for a split second but stays on, I change out the ignition middle of last year, motorcraft , maybe I should put the old one back in.... :help:
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bryan93
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Re: start and cutoff

Post by bryan93 »

vinchez78 wrote:Well... It's doing that shit again :cussing: :cussing: think it could be the IAC? And what exactly does that do??
Not saying it cant be...but I've had a few IAC's die on a mustang and the result both times was a hanging idle(2k+rpm).

Your issue sounds fuel related on paper. Dying fuel pump, bad regulator or plugged fuel filter are the three most obvious that would create a problem starting/running.

1. Fuel filter is $10 and takes 5 minutes to change...if you never have changed it or aren't sure, now should be the time.

2. Check your regulator...pull the vaccum hose off the top. If there is fuel in that connection, you probably found your problem.

3. Dont forget spark...I've had the TFI module create some wild symptoms before and other times just wouldnt start. I think autozone checks them for free. Plug wires, coil, cap, rotor all in good shape?

I had my factory fuel pump die in my old 95 Cobra...started taking more and more turns to start until it wouldnt start anymore.

Good luck sir...chasing gremlins sucks. :beer:
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vinchez78
'93 Cobra Luhva
Posts: 3696
Joined: Wed Apr 04, 2012 3:46 pm

Re: start and cutoff

Post by vinchez78 »

bryan93 wrote:
vinchez78 wrote:Well... It's doing that shit again :cussing: :cussing: think it could be the IAC? And what exactly does that do??
Not saying it cant be...but I've had a few IAC's die on a mustang and the result both times was a hanging idle(2k+rpm).

Your issue sounds fuel related on paper. Dying fuel pump, bad regulator or plugged fuel filter are the three most obvious that would create a problem starting/running.

1. Fuel filter is $10 and takes 5 minutes to change...if you never have changed it or aren't sure, now should be the time.

2. Check your regulator...pull the vaccum hose off the top. If there is fuel in that connection, you probably found your problem.

3. Dont forget spark...I've had the TFI module create some wild symptoms before and other times just wouldnt start. I think autozone checks them for free. Plug wires, coil, cap, rotor all in good shape?


I had my factory fuel pump die in my old 95 Cobra...started taking more and more turns to start until it wouldnt start anymore.

Good luck sir...chasing gremlins sucks. :beer:
Thank u saving private Bryan, I changed my fuel filter last year around Oct time frame, I would have to check on the cap, rotor and plug wires, not too mechanically inclined, however I've learn to do many fixes on my cobra with due research, thanks for the info, will keep in mind. Yes it does suck.

P.S Don't call me Sir, I work for a living :wink:
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vinchez78
'93 Cobra Luhva
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Re: start and cutoff

Post by vinchez78 »

vinchez78 wrote:Haven't had a chance to order one yet, I think it might ignition related, I've noticed that when I turn the ignition all the way up, it will crank, start then cutoff,happens mostly in the morning when its cold, but then if I turn the ignition then turn down just slightly it will act like it will cutoff for a split second but stays on, I change out the ignition middle of last year, motorcraft , maybe I should put the old one back in.... :help:

Well, it turned out that when I replaced the ignition cylinder with a new motorcraft one, it worked for a little while, then I started noticing the crank/cutoff, and it pissed me the F off cuz lately it got worse :cussing: , so luckily I saved the original cylinder and key, went ahead and put the old one back on today , and now it starts first crank :pepper: , I must've bought a defective cylinder, any thoughts??
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Cobra Jet
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Re: start and cutoff

Post by Cobra Jet »

vinchez78 wrote:Well, it turned out that when I replaced the ignition cylinder with a new motorcraft one, it worked for a little while, then I started noticing the crank/cutoff, and it pissed me the F off cuz lately it got worse :cussing: , so luckily I saved the original cylinder and key, went ahead and put the old one back on today , and now it starts first crank :pepper: , I must've bought a defective cylinder, any thoughts??

Check the actual ignition "switch" and the large harness connector that goes to it. This is a common problematic area w/ the 79-93's. The switch is located under the steering column shroud. It becomes intermittent over time and most folks think its just the ignition cylinder. The connector that goes to the actual switch is known to melt, caused by the metal contacts inside becoming fused together. The reason being is over time, the connector becomes brittle and starts to crack. Due to the composition of the plastic with age and constant use, cracking allows the contacts to meet each other, causing shorts. If not taken care of, the plastic connector will continue to deteriorate, causing melting, other electrical shorts and wiring harness issues which could result in a possible fire.

Not trying to scare you into thinking the car will burn up, but, as stated above a bad ignition switch is common on those vehicles. Replacement switches are available from multiple vendors.

Here ya go, part info and video to SHOW the problematic area:
http://www.latemodelrestoration.com/pro ... ch-Install

For future reference - this was also a national Safety Recall issue, see below:
Overview of Recall 95S28

November 29, 1995

To: All Ford Dealers
Applies to CA and Federal Vehicles

Attention:
Dealer Principal
Service Manager
Parts Manager

Subject:
Safety Recall 95S28 - Ignition Switch Replacement

^ All 1989-1990 Model Year Escort

^ All 88 EXP

^ All 1988-1993 Model Year Mustang
Build date thru Sept. 30, 1992


^ All 1988-1993 Model Year Thunderbird and Cougar
Build date thru Sept. 30, 1992

^ All 1988-1993 Model Year Tempo and Topaz
Build date thru Sept. 30, 1992

^ All 1988-1989 Model Year Crown Victoria and Grand Marquis

^ All 1988-1989 Model Year Lincoln Town Car

^ All 1988-1991 Model Year Aerostar

^ All 1988-1991 Model Year Bronco and F-Series Light Trucks


In OASIS: Yes

Listings: Yes

Parts Return: No

Recall Time Limitation: None

^ Please read and circulate these instructions to your Service and Parts personnel.

^ Dealership personnel should become familiar with this recall and be able to respond to owner inquiries.

^ Please ensure servicing technicians understand and comply with the technical instructions for this recall.

***********************************************************************

Affected Vehicles

There are approximately 248,000 vehicles affected by this action.

Reason For Recall

On some of the affected vehicles, a short circuit could develop in the ignition switch that could lead to overheating, smoke, and possibly fire in the steering column area of the vehicle. The condition may occur while the vehicle is in use or unattended.

Service Action

To correct this potential condition, the ignition switch will be replaced with a revised design switch. The wiring in the upper steering column area will also be inspected for the installation of any aftermarket electrical accessories. If an improper installation is noted, you are to advise the customer of the need to have the condition corrected. These correction costs are not part of this recall.

Refunds

Only for owner/dealer-paid ignition switch replacements and made before receipt of the owner letter or after receipt of the owner letter if an emergency replacement was made away from the selling dealer.

NOTE: Refund requests concerned in any manner with fire-related damage are to be forwarded on a goodwill facsimile request form, for review, to the Customer Assistance Center at 1-800-387-7988. Retain original supporting documentation in your records.

*******************************************************************

Recall technical statement release by Ford:

ATTACHMENT III
Safety Recall 95528
Ignition Switch Replacement

1. Connect Rotunda Memory Saver 014-R1064 or equivalent.

2. Disconnect battery negative cable.

NOTE: Access to the ignition switch varies depending on the vehicle line. In all cases the switch is mounted on the steering column and certain items will need to be removed to gain access. Examine the components around the ignition switch to determine what may need to be removed or positioned out of the way. Refer to the appropriate service repair manual for removal and installation procedures. Once access is gained, proceed as follows.

NOTE: The new ignition switch is shipped in the LOCK position. Keep the ignition lock cylinder (ignition key) in the lock position during this procedure.

3. Disconnect electrical connector from the ignition switch.

4. Remove ignition switch retaining screws.

5. Disengage switch from the actuator pin and remove switch from vehicle.

6. Remove the positioning clip from the new ignition switch if so equipped, and install the switch onto the actuator pin. Align the switch mounting holes with the column lock housing threaded holes.

7. If supplied, install new retaining screws. If re-installing original screws, apply Ford Threadlock and Sealer E0AZ-19554-AA (CXC-70) or equivalent to the threads. Tighten to 6-8 N-m (53-70 in-lb).

8. Connect electrical connector to the ignition switch. Ensure that the connections are tight and fully seated.

9. Connect battery negative cable and remove Rotunda Memory Saver.

10. Check ignition switch for proper function, including START and ACC positions.

11. Check the wiring in the area of the upper steering column. If abrasion or exposure of bare wires is found, repair as necessary. If aftermarket accessory wiring is improperly connected, advise the vehicle owner. Advise also the repairs of such faults are at customer expense.

12. Install any components previously removed for access ensuring that no wires are pinched and the components are properly seated. Refer to appropriate service repair manual as

Recall 95S28

November 29, 1995

If the recall has never been done on your vehicle, get it done through Ford. If the Dealership says "the car is too old" for the recall, tell them you will report them for non-compliance of a NHTSA safety recall. It's still an open recall and is to be completed on applicable vehicles that have never been fixed.

Here, use this link too to find out any additional open recalls or safety issues for any make/model:
http://www-odi.nhtsa.dot.gov/owners/SearchVehicles
- Phil
1994 Cobra coupe SVT #13
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Z282SLO
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Re: start and cutoff

Post by Z282SLO »

Cobra Jet wrote:
^ All 1988-1993 Model Year Mustang
Build date thru Sept. 30, 1992



If the recall has never been done on your vehicle, get it done through Ford. If the Dealership says "the car is too old" for the recall, tell them you will report them for non-compliance of a NHTSA safety recall. It's still an open recall and is to be completed on applicable vehicles that have never been fixed.

Here, use this link too to find out any additional open recalls or safety issues for any make/model:
http://www-odi.nhtsa.dot.gov/owners/SearchVehicles

Good info. However, none of our Cobras were built before 9/30/92 (except for possibly a pre-production model) so a Ford dealer is likely to say this doesn't apply to the Cobras.
03 COBRA Black with VMP
93 COBRA Black #3754 (RIP)
89 GT Black/Scarlet Red (SOLD)
86 GT Bright Red/Gray (SOLD)
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vinchez78
'93 Cobra Luhva
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Re: start and cutoff

Post by vinchez78 »

Thanks for the info Jet, but like Z said, doubt they will comply due to our Cobra's being built in 93
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