2000 Ford Explorer V8/ Question

[VW/FordGuy]

Hello all,

Im new to the forums. I have been following alot of these posts and found out quite a few good topics that I have used. Thanks for all the information thus far =).

Any who ive had this on going issue, and I got to the point where I would finally just ask. My 2000 Explorer V8 has been giving me some small issues lately. When I start it cold it starts fine with minimal hesitations. But after about 15-20 mins of driving and then I park it, if I let it sit say another 10-15mins before I start it back it. I wont start right away. Takes usually 6-12 engine rotations before it actually starts. The other issue I have noticed with it is... If I pull out onto traffic and just say I floor it. It doesnt seem to have any low end power. But once it gets going to about 3900-4200rpm it really takes off. I have a full exhaust on it going to a borla muffler I welded up and a K/N intake. So you can really hear the sound changes during this. Im positive they are linked together some how.

I just changed the plugs,fuel filter, new k/n filter, and cam sensor. I did notice on the coil on the drivers side that the plug for it was actually cracked and lose. But I dont see that being the issue, because it happens whether it is dry or wet out. Im a mechanic so... Diagnosing issues yous recommend is not a real issue. I lie im a VW mechanic but I work on everything. I havent gotten around to hanging a fuel pressure gauge on it yet. We are moving so all my real tools are packed away. I scanned it 2-3 times and have not got any codes or anything in the history.

Its a 2000 Explorer V8 AWD, with 198,000. The motor is a jasper replacement I put in about 9 months ago. It has approximately 10,000 miles on it. It was a short block so no accesories or any electronics were on it.

Thanks for any info in advance

 

[imp]

Hot start problem, sooo.........When starting cold, PCM strives to keep running by enriching fuel/air mixture, like the last-world's choke did. In fact, emissions are ignored until the engine reaches a certain temp.

Sounds like hot start situation is not getting enough fuel up front, quickly enough. Fuel filter first, pump next, check fuel pressure before these 2 would be best......

Just my opinion. imp

 

[VW/FordGuy]

Yeah, I was thinking pump also. I did the filter already so that outta the question. I heard a few other scenarios that I thought might of been brough up. Ill wait to here from some others. Thanks for the input. Ill hang a gauge on it sometime tommorw.

Thanks again and in advance

 

[88cougar]

What brand of plugs did you use? I had a similar problem. I was using NGKrap plugs and found that the electrodes were completely gone after less than 10,000 km. (6000 miles). I switched to Autolites and a new set of Aurora wires (Thanks Celly ) and no more hot start issues. It also cleared up my off idle stumble and pinging problem as well.

Good luck

 

[Dan Whitaker]

Have you cleaned the MAF? It's amazing how much a dirty MAF will affect performance and how many little issues it will cause.

K/N filters are notorious for oiling down the MAF sensor.