My car has an intermittant miss

Hello,

Usually the Crankshaft Position Sensor (CKP) is the sensor the Power-train Control Module (PCM) or "computer" uses for it's misfire monitor. It can determine misfires from the CKP because every time there is a misfire, the crankshaft will slow down and the PCM is able to track this with great precision, even being able to determine which cylinder is misfiring. I can send you the Ford factory pinpoint test for your vehicle's misfire monitor, Pinpoint Test HD, but it requires the use of a scan tool capable of accessing the vehicle's PID values, and a special tool, called a breakout box. If you would like us to send you these tests, please get back to us and let us know, otherwise, here is a link for you to go to.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Hello again,

That's awesome. I have a supercharged 97 Ford Mustang GT that I built from the pistons up that is producing around 400 rwhp, and I haven't touched the restrictive first generation heads on my engine, and haven't touched the cams at all yet. Look if you know cars, then you know modern cars. All the sensors are doing is taking something that older cars did mechanically, and is converting it to electricity. Electricity is the language that the computer(fuel injection and ignition timing input/output device) understands. All cars are the same, basically, and it breaks down like this, Mass Air Flow Sensor (MAF) reads the amount of air the engine is ingesting, Intake Air Temperature Sensor (IAT) reads the temperature of the air, Throttle Position Sensor (TPS) reads where the throttle is idle - Wide Open Throttle (WOT), Engine Coolant Temperature Sensor(ECT) reads coolant temperature, and Heated Oxygen Sensors(O2 Sensor) which reads the Oxygen in the exhaust for the Air:Fuel ratio(14.7:1). There are a few others, but they all deal with emissions and are not for engine performance. There it is. Not so difficult after all. Remember, the sensors take mechanical and turn it into electricity. The breakout box you can purchase on Ebay, they cost around $300.00. Basically it is a box with the 104 holes on the face that you plug inline in between the Power-train Control Module (PCM) or "computer" connector and the PCM. Each hole substitutes for that pin on the connector and you can use your multi-meter to run tests without messing up the pins on the PCM or the Connector or wiring harness. Anyway I will get those pinpoint tests to you in a few.

Thanks,
Alex
2CarPros