20 Most Recent 1991 Ford Mustang - Page 2 Questions & Answers

if you're trying to hold the idle over 3500 , you're going to hit the Rev Limiter, Einstein. Racing cars will lead you to no good , son. If I'm wrong or missunderstanding you please clarify.

Start by checking for vacuum leaks, compression then a scan for fault codes. One of those should turn up a problem

could be the control module . many of the fords have them that bolt on the outside of the tranny .......check local parts house for replacement part, and they should be able to tell you how it goes on...... otherwise , aamco , can test the tranny to see if it's more serious issue.....

Firing Order is 1-3-7-2-6-5-4-8 cylinder number 1 is on the passenger side of engine at the front - 1234 (front to back) on the passenger side 5678 (front to back) on the drivers side here is a picture to help: Orange County Mobile Mechanics 714 709 4594 I hope this helps you, if so please post your comments by clicking "submit a review" Thanks! Robert Grove Wego2u Mobile Mechanic

I would check the timing could have jumped a tooth on the timing belt/chain. Also check the rotor in the distributer make sure that it is not worn out. I have also seen a plugged catletic converter cause big time power loss and really strange problems

Get a cheap set of noid lights and check for electrical pulse. If there is none, test your crank positioning sensor and the wires to it. If that don't work, try testing the distributor's electronic module.

One of the wires on your ignition feed is possibly wrong, causing the engine to switch off when leaving the ignition.

did you replace the distributer lately? if so it could be in the wrong position. check the firing order for the plugs first. the hard way is to take the number one plug out. hold your finger over the hole and have someone "bump" until you feel air push on your finger. then check timing mark on the pulley in front of the engine. should be a marker there and a line on where it should be. Make sure distributer is out when doing this. when the timing mark is before the maker. insert distributer with the rotor facing to the number one plug position. attach plug wires. replace number one plug. and then try to start. if it runs rough just twist the distributer until it runs at its best.

the ground is controled by the computer . u have and ignition control module fault . it is located on the side on the distibutor take less then 10 minute to replace and is always the problem i worked for ford for the last 24 years

The firing order is shown below from Jeff back in April 2011. The order is 1-3-7-2-6-5-4-8 and cylinder one is front passenger side of engine.I would agree with the person who answered your question earlier, all of the injectors are powered by the same red wire, half of them are grounded on one circuit and the other half on a second circuit. Both circuits come from the computer.So if you have spark the ignition module is working, which would point to the computer being the problem.

what is your model number is then we can get started then

If you've recently added (or oiled) a cotton air filter like a K&N, extra oil can foul the MAF sensor causing drivability issues. Most helpful thing you could do is pull the codes though and post them on here, as it could be many things... bad O2 sensor, intake leak past the MAF, failing fuel pressure regulator (my main guess) and others. It'd help if you listed what engine your car has as well and how many miles it has, and if you have this problem under load only or even when it is in idle. Pull the codes.

Poss water pump bearing, grab the water pump pulley and see if it moves side to side and up and down, if so the bearing is gone.

check for power to the coil pack and also ground signal from the ECM.