vaccum problem

The heat in my 2007 Explorer Eddie Bauer 4.0L works great if i keep the heater valve zip tied in open position. I have vaccum tested the control valve and it holds vaccum. Where do i search next? blend door works great selector switch seems to do what i tell it. I believe there is a vaccum issue...

After changing the oil, fuel and air filters, I developed a miss in my truck. Sounded like a bad injector. I thought something was in the fuel filter and got into the fuel system. So I pulled the injectors and cleaned them, and the rails. After putting everything back together, I now have a...

Ok changed fule pump 2x fuel tank fuel filtter 3x. And it wont stop pullin bank 1 bank 2 system too lean also changed temp sensor could it be a vaccum leak I cant find any thing bout alot of part I do all my own work some one tell me where to start.

I was wondering if anyone knew when the ignition coils should be replaced .... The truck chuggs when you push down on the accelerator and when I took it to the shop they hooked it up to the scanner and it said it was in need of a tune up and it was misfiring, that the O2 sensors are bad and...

Greetings all, first time here. I tried to find an answer, but was unable to, so I thought I would post this question for all you experts out there. 1995 Explorer XLT, 4.0liter engine purchased about 18 months ago. It had a few things wrong with it, the windshield washer didn't work...