Daisywheels
Well-Known Member
- Joined
- July 1, 2014
- Messages
- 271
- Reaction score
- 2
- Year, Model & Trim Level
- 1999 XLT XP SOHC V6
Hi, I've been posting questions regarding the same problem, and I'm not sure if I should start a new thread each time or not? Can someone please advise?
The definite common denominator for my problem from all you guys is a vacuum leak. Obviously I have been unable to find it!
I had P0300, and P030X codes, so far I replaced plugs, wires, and coil pack. I had already replaced the MAF sensor back in August. Now my codes are P0300 and P0303
I tried to test the cylinders by removing one of the wires from the coil pack back in the Summer while running. Not a good idea - ZAP. So I finally decided to pull the plug wires from the plugs themselves yesterday. Good news is I did not get zapped, but there was no change in idle while pulling wires on the ENTIRE BANK 1. There WAS spark getting to the wires as it bounced off the heads with wires in hand. Bank 2 wires pulled did what they were supposed to do - lowered idle noticeably.
I'm still at a total loss as to why this truck won't cooperate. One last piece of information is on my OLD MAF sensor, I was getting P0174 (lean code), and with the new MAF sensor, the scanner was reporting P0102 Mass or Volume Air Flow Circuit Low Input. Basically the PO174 went away and was replaced with P0102 with the new MAF sensor.
BOTH banks LTFTs read 25, which just tells me the computer can't calculate it properly due to the motor not running properly.
ANY help would be greatly appreciated, and if I left anything out please ask!
[EDIT] Yes, I do have a flashing CEL.
Thanks - DW
The definite common denominator for my problem from all you guys is a vacuum leak. Obviously I have been unable to find it!
I had P0300, and P030X codes, so far I replaced plugs, wires, and coil pack. I had already replaced the MAF sensor back in August. Now my codes are P0300 and P0303
I tried to test the cylinders by removing one of the wires from the coil pack back in the Summer while running. Not a good idea - ZAP. So I finally decided to pull the plug wires from the plugs themselves yesterday. Good news is I did not get zapped, but there was no change in idle while pulling wires on the ENTIRE BANK 1. There WAS spark getting to the wires as it bounced off the heads with wires in hand. Bank 2 wires pulled did what they were supposed to do - lowered idle noticeably.
I'm still at a total loss as to why this truck won't cooperate. One last piece of information is on my OLD MAF sensor, I was getting P0174 (lean code), and with the new MAF sensor, the scanner was reporting P0102 Mass or Volume Air Flow Circuit Low Input. Basically the PO174 went away and was replaced with P0102 with the new MAF sensor.
BOTH banks LTFTs read 25, which just tells me the computer can't calculate it properly due to the motor not running properly.
ANY help would be greatly appreciated, and if I left anything out please ask!
[EDIT] Yes, I do have a flashing CEL.
Thanks - DW