Tweet
Last night I was driving to Huber Heights here in Ohio...and the whole way there she was fine. Well I was running low on gas, so I started to pull into speedway and she started running real rough.
So I put gas in her, and left speedway, still running rough. I made it to my friend's house ( 1 am ) and looked in the engine bay and heard some tapping. I immediately looked for arching wires...I found two, cylinder 2 and 4. I made it back to my place and I pulled the wires off ( 2am ) and didn't see any burn marks...so we waited until morning and I went and bought some AC Delco wires, and put them on. It calmed the miss fire down, and cured the arching...however...it didn't cure the miss fire.
I pulled the plugs, and the plugs look fine, no major carbon build up, just signs of running lean...
I put it to an OBDII scanner and picked up 7 codes ( low MAF output, that's me I unplugged it to see how it ran...when the MAF originally went out she ran better without it. ), 2 Random Multiple Cylinder Miss Fires, 2 System too lean bank 1 and bank 2 and 2 pending system too lean bank 1 and 2.
My first thought "...O2 sensors. " but I thought about it, and hooked it up to one of the more expensive OBDII scanners, and both the O2's are running the exact same output still, and the simulator on the 3rd O2 is still running fine. My sensors came out fine as well.
...so I hooked up a Fuel pressure test gauge on it. At key on when the fuel pump is priming it shoots to 50psi, and then down to about 42. I turn her on and it stays at 41-42. I gave it a little bit of a rev about half way through my rpms, and it dropped to 38.
...Ideas?
Also, it never did this before, but right now as it sits, whenever the clutch is engaged it makes a tapping sound around the clutch assembly, and when I disengage it's quiet...never did it before...
Ideas? I want to blame the coil packs and ICM....but that doesn't really explain the fuel pressure.
So I put gas in her, and left speedway, still running rough. I made it to my friend's house ( 1 am ) and looked in the engine bay and heard some tapping. I immediately looked for arching wires...I found two, cylinder 2 and 4. I made it back to my place and I pulled the wires off ( 2am ) and didn't see any burn marks...so we waited until morning and I went and bought some AC Delco wires, and put them on. It calmed the miss fire down, and cured the arching...however...it didn't cure the miss fire.
I pulled the plugs, and the plugs look fine, no major carbon build up, just signs of running lean...
I put it to an OBDII scanner and picked up 7 codes ( low MAF output, that's me I unplugged it to see how it ran...when the MAF originally went out she ran better without it. ), 2 Random Multiple Cylinder Miss Fires, 2 System too lean bank 1 and bank 2 and 2 pending system too lean bank 1 and 2.
My first thought "...O2 sensors. " but I thought about it, and hooked it up to one of the more expensive OBDII scanners, and both the O2's are running the exact same output still, and the simulator on the 3rd O2 is still running fine. My sensors came out fine as well.
...so I hooked up a Fuel pressure test gauge on it. At key on when the fuel pump is priming it shoots to 50psi, and then down to about 42. I turn her on and it stays at 41-42. I gave it a little bit of a rev about half way through my rpms, and it dropped to 38.
...Ideas?
Also, it never did this before, but right now as it sits, whenever the clutch is engaged it makes a tapping sound around the clutch assembly, and when I disengage it's quiet...never did it before...
Ideas? I want to blame the coil packs and ICM....but that doesn't really explain the fuel pressure.
Comment