Engine Performance problem
1992 Ford F150 V8 Four Wheel Drive Manual
When the key is on but not started the check engine light will flash and rpm needle bounces around. When the vehicle is on and is hot the check engine light goes on and off, its idles rough and rpm needle bounces, and it sputs like its running out of gas, but is not. When its cool out and the vehicle has just started, it runs fine till engine gets hot. I had it tested under the obd1 tester. It said it was the map sensor. I've replaced the map sensor, along with the computer, spark plugs and wires, distributor cap and rotor, intake air temp sensor, tps electrical sensor, throttle positioning sensor, coolant temp sensor, fuel filter, fuel regulator, idle air control cylinoid, bypass air idle speed control cylinoid, thermostat, and have also had the electronic ignition module tested. Also, when hot tail pipe blows black smoke. After fixing all of these things there is still no change. Please help with any info you can. Thank you.
Wednesday, June 25th, 2008 AT 9:19 PM