P0301 code still

Tiny
RSCAMARO73
  • MEMBER
  • 2001 FORD WINDSTAR
Engine problem 6 cyl Front Wheel Drive Automatic 80,000 miles

I had the P0171/P0174 codes, and before I did some repairs started getting the P0301 code. I ordered a kit to replace the seals, isolator bolts, and valve cover & PCV valve. All that was changed, van ran pretty good. Added seafoam to the tank, started running a little better after that ran thru it. Was still getting an intermittent misfire. Could feel it thru the gas pedal as it backfired thru the exhaust. Loud too. Had checked fuel pressure, and it was about 28 at idle, and would not go above 30 in idle at 3000rpm.
The other day it was raining alot and of course the engine gets some water spray in it, belt starts to squeal. Misfire got REALLY bad and CEL was flashing, and staying on. Had NO power at all below 3000rpm. Wasn't in a spot to stop so I had to keep going. FFWD to today, I scan it and get the P0301 code still, with a slight misfire and random popping in the exhaust.

My questions are the following: would a failing coil cause this? I had a similar issue with a 94 Grand Am, but the misfire didn't show up until the engine was under load and I didn't find it until I started pulling wired with it running to isolate the cylinder (no CEL on that one). I'm not versed on what Ford is using on the 01 Windstar, coil wise.

Other notes as follows:

I've changed the plugs about a year ago, and would rather NOT have to spend another hour under there with my arm in a painful position changing #1 plug 'in the blind' again.

I've read about EGR ports, and I checked a few when I had the upper intake apart. Nothing found with a pick and sprayed a few with carb cleaner. I didn't touch #1 since I found mostly oil residue on the front side (4-5-6 cyl) of the block.

All parts I removed were inspected for movement and grit/dirt and other than some oil on the inside of the intake, there was nothing else (other than the leaking seals, which all were replaced). Should I have dabbed some RTV on the bottoms of the seals?

Thanks for your help :)
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Thursday, February 14th, 2008 AT 11:33 AM

4 Replies

Tiny
FLEXY5
  • MEMBER
The first question I'll answer is about the silicone. You did good and did not need to add RTV. If the Engine is popping it's because the cylinder is loading up with fuel. Is the miss consistent when under a load or is it any range of throttle? If it is under a load, it is probably ignition. My guess is it is related to the plugs or wires. It may be the plug that has gotten some garbage in the intake. There are some other possibilities that I can share with you if you would like, but I would check the plug first (sorry). If you want to spend about ten minutes taking off something else to get to plug #1 from the top side, I can share that with you also. Just let me know.
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Thursday, February 14th, 2008 AT 6:34 PM
Tiny
RSCAMARO73
  • MEMBER
Well, I went back at it this afternoon. Pulled the upper intake off, and cleaned up the ports more, cleaned out the egr ports, sprayed carb cleaner in there and the butterflies and the port/bowl area there. It was NASTY. Worse than any carb'd 70's engine. Wiped off any oil on the seals (still have a problem getting oil in the intake like before since it was cleaned off less than 3 weeks ago).

Misfire is still there. Just got the P0301 code. And its surging like there's a vac leak. Starts to pull and take off from about 2500rpm's and up. Real heavy surge like it wants to die, but jumps up again. My hands HURT from trying to just TOUCH the #1 plug. There's no way I can get to it from the top. So its back at it from the bottom.. Just need some warm weather annd some funds for a new set of plugs and wires. Any pointers?
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Thursday, February 14th, 2008 AT 8:34 PM
Tiny
FLEXY5
  • MEMBER
I worked for Ford for years. I've never pulled a plug from underneath a vehicle. If you remove the wiper arms, you can remove the plastic cowl. After the cowl comes off, disconnect the wiper motor plug on the drivers side. Then look for several small bolts. There are two on each side, and six in the middle. Take them off and you can lift out the entire wiper transmission cradle. This whole process takes about 5 minutes if you have done it before--ten if you have not. Then you can get to it from the top. By the way, the intake will always have oil puddled in the plastic part. And I had thought about the EGR butterfly's, but dismissed it because they usually produce a P0316 random misfire code.
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Friday, February 15th, 2008 AT 9:17 PM
Tiny
DJT4LIFE4EVER
  • MEMBER
Have P0301 code, looking to try and repair. I will try flexy5 suggestion on the plug and wires first. Is there there a way to test the coil packs? I can only guess this would be the next step in determining the cause. To clear the code, I have been told that after 2-3 restarts once fixed would clear itself or has to be removed from a tester, is this all that can be done? Lastly, radio console went out, checked the fuses on drivers side and all seem to be good, any ideas?

2003 Windstar 3.8L V6, Auto
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Wednesday, February 11th, 2009 AT 11:13 PM

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