I dont own a mustang, but its my friends so here it goes...
My friends mustang has been misfiring for the last two weeks or so.
We have replaced:
Spark plugs
Wires
Distributor cap
Rotor
Fuel filter
Air filter
It is a 1995 mustang GT
The car runs fine when it is cold, but when it warms up a little it starts to get worse and worse... to the point where it is misfiring 50 times a minute (and i'm serious).
His temperature gauge does not reach the normal position it just raises a bit from the cold and then stops there. This started when the misfires started... so I looked around on the internet and some places said it could be a sensor. Could it be the coolant temp. sensor causeing the gauge problem, and the misfire, (if i remember correcly the coolant sensor has a lot to do with a/f ratios) So could a messed up coolant sensor, cause the misfire.
BTW he does NOT have a check engine light.
Thank you very much.
My friends mustang has been misfiring for the last two weeks or so.
We have replaced:
Spark plugs
Wires
Distributor cap
Rotor
Fuel filter
Air filter
It is a 1995 mustang GT
The car runs fine when it is cold, but when it warms up a little it starts to get worse and worse... to the point where it is misfiring 50 times a minute (and i'm serious).
His temperature gauge does not reach the normal position it just raises a bit from the cold and then stops there. This started when the misfires started... so I looked around on the internet and some places said it could be a sensor. Could it be the coolant temp. sensor causeing the gauge problem, and the misfire, (if i remember correcly the coolant sensor has a lot to do with a/f ratios) So could a messed up coolant sensor, cause the misfire.
BTW he does NOT have a check engine light.
Thank you very much.
If it was there after the tune up, you could have a cracked plug or defective plug wire. Generally the hotter the engine components become, the more resistance there is in the electrical components. I have seen this many times in ignition systems. And remember, just because the part is new, doesn't mean it can't be defective. Did he use good quality parts or cheapo brand? Is there alot of black smoke coming out of the tail pipe when this problem starts to happen? This would indicate a rich condition and could be caused by various different things. The engine temp could also cause this. If the ECT reads a certain voltage, say reading a voltage telling the ECM the car is still cold,the ECM will call for more fuel creating the rich condition. In short, the ECM thinks the engine is cold due to a faulty reading from the ECT sensor. Also an engine miss will act differently than a car running overly rich. Hope this helps and good luck.
