20 Most Recent 1991 Ford Mustang Questions & Answers


1991 Mustang not equipped with DRL.

1991 Ford... | Answered on Dec 31, 2018


First when was the engine tuned up last ? is it using oil ? How many miles are on the engine. The knock you are hearing is it up top or louder under the car. Need more information. you could spin the oil filter off and cut it apart and see whats on the paper part of the filter. if there are metal flakes then you have something failing inside the engine.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/darryl_24e8d8d43e609e3c

1991 Ford... | Answered on Sep 19, 2017


Reset the inertia sensor. This part is a safety switch to prevent fires in collisions. The downfall is that shutting a door or trunk-lid can sometimes activate this feature. It is a simple device using a magnetic ball to connect the power to the fuel pump. Most are mounted in the trunk and have a reset button to press.

1991 Ford... | Answered on Aug 22, 2017


Check all the fuse links under the hood. Get a manual for your car at an auto parts store for the locations of them.

1991 Ford... | Answered on Jun 17, 2017


I'd start with the mass air flow sensor as your friends have pointed out. This is the first link in what could be the cause of lack of air flow, or a lean/rich fuel mix sensing issue. Your catalytic converter would be the next check I'd make. If your running rich, the converter will plug up or the O2 sensor may be affected and then the car will be shaking and loss of acceleration is often a result.

1991 Ford... | Answered on Apr 12, 2017


Sounds like the actual pressure plate but you won't be able to confirm without dismantling it.

1991 Ford... | Answered on Mar 01, 2017


The starter solenoid is most likely shorted. Located close to battery and positive cable goes to it.

1991 Ford... | Answered on Apr 11, 2015


there is a solenoid that locks out gear shifter. it is controlled by the brakelight switch. there is an override . see your owners manual

1991 Ford... | Answered on Mar 30, 2015


The ignition module sends a "pip" signal to turn on the fuel pump and keep it running. If the signal is lost, or not present you get no pump. This is a safety in case of accident or other hazard in order to shut off the fuel so it wont keep pumping into a car with the key still on but engine disabled for some reason. Take the module to your local parts store and have it tested, for free to check.

1991 Ford... | Answered on Jan 07, 2015


If you are going to work on this car Purchase the Clymer manual.. or borrow one from the library.. Wiring diagram? there are 8 plug wires (firing order) and a plug for the IGN module. you did not say why you needed a diagram.. What is the car doing ? WRITE A COMMENT AND LET US KNOW WHAT YOU NEED.

1991 Ford... | Answered on Jan 07, 2015


well, check the fuse/relay then you will need to remove the control panel to access the switch then check the switch its self in all positions with a volt meter. if none of those things have found the prob then you prob have a bad blower motor. most likely its a fuse/relay usualy or a switch. when a motor goes it usually will still blow on high. if its out completely it ususaully smells like burnt tape.dont worry its prob something simple and cheap, ie fuse/relay. Let me know MrRodneyLong@gmail.com

1991 Ford... | Answered on Sep 13, 2014


seems to me that you could have an air lock, try loosening the rad cap slightly and run car until fans kicks in, squeeze upper rad hose a few times to push any air out. Careful with hot hoses. see if this helps.

1991 Ford... | Answered on Sep 07, 2014


Assuming there are not any codes. I would lean toward issue with the distributor.

1991 Ford... | Answered on Jul 12, 2014


1991-1993 Mustangs are bad for this problem. It is usually a flasher unit problem. There are 2 flasher units. One is under the dash on the driver's side and the other is behind the dash between the glovebox and the radio (you can get to this one if you push the sides of the glovebox in and open it all the way out). Usually it is this flasher unit that causes this problem but you might have to change them both. Also, try this first before changing the flasher(s) - Try pushing the emergency flasher button on and off several times because it might not be making good contact. Good luck !! 3668e5fd-06e7-4b12-80a4-50332ff5d23f.jpg

1991 Ford... | Answered on Jul 04, 2014


The side that is not blinking has a burned bulb, or ground short in the bulb socket. Set the side that will not blink. Look at the bulbs to see which is not lighting. Change the bulb.

1991 Ford... | Answered on Jul 04, 2014

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