So there's a backstory as to how this is all my fault, but it's kind of embarrasing so here's the end result. I have a 2006 Ford Explorer XLT. As the result of something I was experimenting with there was some severe damage to the air intake system (An explosion that destroyed most of the plastic parts). I've replaced just about everything under the hood, but I still have an issue with the vehicle, and here are my symptoms.
- If the engine is cold, it starts right up with no problems. However, if it's hot outside, or if I've been driving recently and I try to start the engine, it tries to die unless I slap the gas. It will stutter for 5-10 seconds and eventually even out. After it evens out it runs great.
- When I fill up the gas, it doesn't want to start, it's the same as when the engine is warm, but much worse. When I fill up, I have to hold the starter and hold the gas down. Then, once it starts, I hold the RPMs at around 2,000 for about 10 seconds, and when I let off it will run just fine. If I let off the gas too early once it starts, it will just die.
- If I drive for a really long period of time without stopping, it doesn't want to shut off. For example last September I ended my contract with the Army and drove back to Kentucky from Washington. I would put in about 700 miles a day, and would fill up every 350 miles or so. I didn't usually stop between fill-ups, I would just stop at a truck stop or something where I could also eat and everything. When I would stop after driving for 300+ miles without stopping, when I would turn off the engine and remove the key, the engine would continue to sputter and crank for 3 or 4 seconds, as if it had an excess of fuel that was being burned off.
- Gas mileage does not seem to be affected, at least not very noticeably anyway. I was getting about 20 mpg on the highway before the damage, and am getting about the same now, depending on terrain.
I really don't want to spend thousands of dollars replacing every little piece it could possibly be in hopes of finding the right one early, so any advice or suggestions you could offer to help me eliminate this problem would be greatly appreciated.