godfather18 Posted March 16, 2007 Posted March 16, 2007 Heys guys my uncles 1994 ES 300 has a Cylinder 6 misfire, we put it to a scanner and it said cylinder 1 = 0 cylinder 2 = 0 cylinder 3 = 0 cylinder 4 = 0 cylinder 5 = 0 cylinder 6 = 217 misfire we pulled and cleaned the spark plug and that didnt work, we also swapped coils and didnt work neither. If anyone has any idea why this is happening please feel free to give some input
SKperformance Posted March 16, 2007 Posted March 16, 2007 Did you hold the spark plug connected to the coil and ground it to see if it is actually firing?
godfather18 Posted March 16, 2007 Author Posted March 16, 2007 Did you hold the spark plug connected to the coil and ground it to see if it is actually firing? YES, I also left the car on and pulled each coil out and when u pull coil 6 on cylinder six it does not do anything but when u pull the other one the engine starts to shake, we also swapped the spark plugs and still cylinder six keep misfiring. (TOYSRME need some of your input)
92Lex Posted March 16, 2007 Posted March 16, 2007 Have you checked compression and fuel injector bench test? Is it a coil on plug system?
godfather18 Posted March 16, 2007 Author Posted March 16, 2007 Have you checked compression and fuel injector bench test? Is it a coil on plug system? Coil on plug system yes, thats what we r going to do next a compression test.
SKperformance Posted March 16, 2007 Posted March 16, 2007 Just because you pulled a plug does not tell you anything if it is firing. You need to have the plug in the coil and ground the side of the plug to confirm visually if there is spark across the gap and then you will also be able to see if there is any gas in the cylinder being sprayed out.
godfather18 Posted March 16, 2007 Author Posted March 16, 2007 Just because you pulled a plug does not tell you anything if it is firing. You need to have the plug in the coil and ground the side of the plug to confirm visually if there is spark across the gap and then you will also be able to see if there is any gas in the cylinder being sprayed out. we took the spark plug out, black as hell and then we cleaned it and put it back in for like 30 minutes took it back out and the spark plug was black as hell again.
JPI Posted March 17, 2007 Posted March 17, 2007 Just because you pulled a plug does not tell you anything if it is firing. You need to have the plug in the coil and ground the side of the plug to confirm visually if there is spark across the gap and then you will also be able to see if there is any gas in the cylinder being sprayed out. we took the spark plug out, black as hell and then we cleaned it and put it back in for like 30 minutes took it back out and the spark plug was black as hell again. Hello there, How is your ignition system? Are you getting sparks to the #6 cylinder? What is your fuel pressure? How about some long term fuel trim(bank 1 and 2)? What is your LT fuel at idle an 2500rpm? What is the air flow reading at idle? Have you scope the crank ? Have you hook up vaccum gauge? It's very diffiuclt to properly diagnost the vehicle without the needed information. BTW, There is no such thing as number 6 = 217 misfired. Misfired count as percentage. Sometimes it wouldn't pick up the reading on my Lexus scanner. A good ignition scope needed in these cases. JPI
tckcumming Posted March 18, 2007 Posted March 18, 2007 Just because you pulled a plug does not tell you anything if it is firing. You need to have the plug in the coil and ground the side of the plug to confirm visually if there is spark across the gap and then you will also be able to see if there is any gas in the cylinder being sprayed out. we took the spark plug out, black as hell and then we cleaned it and put it back in for like 30 minutes took it back out and the spark plug was black as hell again. Sounds like a bad injector in cyl. # 6. Black sooty plug = too much fuel in that cylinder, causing the plug to foul. Can be caused by bad spark, too - but switching plugs, coils, wires etc, as you say you have done, should have ruled that out, for now. Try a new injector (or one you know is good) in cyl. # 6 and see what happens. If it fixes the misfire... you're good to go. If it doesn't - then you will know it's probably an ignition problem & needs further detective work in that direction. Just my guess, as usual. tck...
godfather18 Posted March 21, 2007 Author Posted March 21, 2007 Found the problem guys, it was the Fuel Pressure Regulator
JPI Posted March 21, 2007 Posted March 21, 2007 Found the problem guys, it was the Fuel Pressure Regulator What was the fuel pressure? JPI
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